# generated automatically by aclocal 1.17 -*- Autoconf -*-

# Copyright (C) 1996-2024 Free Software Foundation, Inc.

# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
m4_ifndef([AC_AUTOCONF_VERSION],
  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.72],,
[m4_warning([this file was generated for autoconf 2.72.
You have another version of autoconf.  It may work, but is not guaranteed to.
If you have problems, you may need to regenerate the build system entirely.
To do so, use the procedure documented by the package, typically 'autoreconf'.])])

# ===========================================================================
#  https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_CXX_COMPILE_STDCXX(VERSION, [ext|noext], [mandatory|optional])
#
# DESCRIPTION
#
#   Check for baseline language coverage in the compiler for the specified
#   version of the C++ standard.  If necessary, add switches to CXX and
#   CXXCPP to enable support.  VERSION may be '11', '14', '17', or '20' for
#   the respective C++ standard version.
#
#   The second argument, if specified, indicates whether you insist on an
#   extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g.
#   -std=c++11).  If neither is specified, you get whatever works, with
#   preference for no added switch, and then for an extended mode.
#
#   The third argument, if specified 'mandatory' or if left unspecified,
#   indicates that baseline support for the specified C++ standard is
#   required and that the macro should error out if no mode with that
#   support is found.  If specified 'optional', then configuration proceeds
#   regardless, after defining HAVE_CXX${VERSION} if and only if a
#   supporting mode is found.
#
# LICENSE
#
#   Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
#   Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
#   Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
#   Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
#   Copyright (c) 2015 Paul Norman <penorman@mac.com>
#   Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
#   Copyright (c) 2016, 2018 Krzesimir Nowak <qdlacz@gmail.com>
#   Copyright (c) 2019 Enji Cooper <yaneurabeya@gmail.com>
#   Copyright (c) 2020 Jason Merrill <jason@redhat.com>
#   Copyright (c) 2021 Jörn Heusipp <osmanx@problemloesungsmaschine.de>
#
#   Copying and distribution of this file, with or without modification, are
#   permitted in any medium without royalty provided the copyright notice
#   and this notice are preserved.  This file is offered as-is, without any
#   warranty.

#serial 15

dnl  This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro
dnl  (serial version number 13).

AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
  m4_if([$1], [11], [ax_cxx_compile_alternatives="11 0x"],
        [$1], [14], [ax_cxx_compile_alternatives="14 1y"],
        [$1], [17], [ax_cxx_compile_alternatives="17 1z"],
        [$1], [20], [ax_cxx_compile_alternatives="20"],
        [m4_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl
  m4_if([$2], [], [],
        [$2], [ext], [],
        [$2], [noext], [],
        [m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX])])dnl
  m4_if([$3], [], [ax_cxx_compile_cxx$1_required=true],
        [$3], [mandatory], [ax_cxx_compile_cxx$1_required=true],
        [$3], [optional], [ax_cxx_compile_cxx$1_required=false],
        [m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])])
  AC_LANG_PUSH([C++])dnl
  ac_success=no

  m4_if([$2], [], [dnl
    AC_CACHE_CHECK(whether $CXX supports C++$1 features by default,
		   ax_cv_cxx_compile_cxx$1,
      [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
        [ax_cv_cxx_compile_cxx$1=yes],
        [ax_cv_cxx_compile_cxx$1=no])])
    if test x$ax_cv_cxx_compile_cxx$1 = xyes; then
      ac_success=yes
    fi])

  m4_if([$2], [noext], [], [dnl
  if test x$ac_success = xno; then
    for alternative in ${ax_cxx_compile_alternatives}; do
      switch="-std=gnu++${alternative}"
      cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
      AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
                     $cachevar,
        [ac_save_CXX="$CXX"
         CXX="$CXX $switch"
         AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
          [eval $cachevar=yes],
          [eval $cachevar=no])
         CXX="$ac_save_CXX"])
      if eval test x\$$cachevar = xyes; then
        CXX="$CXX $switch"
        if test -n "$CXXCPP" ; then
          CXXCPP="$CXXCPP $switch"
        fi
        ac_success=yes
        break
      fi
    done
  fi])

  m4_if([$2], [ext], [], [dnl
  if test x$ac_success = xno; then
    dnl HP's aCC needs +std=c++11 according to:
    dnl http://h21007.www2.hp.com/portal/download/files/unprot/aCxx/PDF_Release_Notes/769149-001.pdf
    dnl Cray's crayCC needs "-h std=c++11"
    for alternative in ${ax_cxx_compile_alternatives}; do
      for switch in -std=c++${alternative} +std=c++${alternative} "-h std=c++${alternative}"; do
        cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
        AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
                       $cachevar,
          [ac_save_CXX="$CXX"
           CXX="$CXX $switch"
           AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
            [eval $cachevar=yes],
            [eval $cachevar=no])
           CXX="$ac_save_CXX"])
        if eval test x\$$cachevar = xyes; then
          CXX="$CXX $switch"
          if test -n "$CXXCPP" ; then
            CXXCPP="$CXXCPP $switch"
          fi
          ac_success=yes
          break
        fi
      done
      if test x$ac_success = xyes; then
        break
      fi
    done
  fi])
  AC_LANG_POP([C++])
  if test x$ax_cxx_compile_cxx$1_required = xtrue; then
    if test x$ac_success = xno; then
      AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.])
    fi
  fi
  if test x$ac_success = xno; then
    HAVE_CXX$1=0
    AC_MSG_NOTICE([No compiler with C++$1 support was found])
  else
    HAVE_CXX$1=1
    AC_DEFINE(HAVE_CXX$1,1,
              [define if the compiler supports basic C++$1 syntax])
  fi
  AC_SUBST(HAVE_CXX$1)
])


dnl  Test body for checking C++11 support

m4_define([_AX_CXX_COMPILE_STDCXX_testbody_11],
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
)

dnl  Test body for checking C++14 support

m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14],
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
)

dnl  Test body for checking C++17 support

m4_define([_AX_CXX_COMPILE_STDCXX_testbody_17],
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
)

dnl  Test body for checking C++20 support

m4_define([_AX_CXX_COMPILE_STDCXX_testbody_20],
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
  _AX_CXX_COMPILE_STDCXX_testbody_new_in_20
)


dnl  Tests for new features in C++11

m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_11], [[

// If the compiler admits that it is not ready for C++11, why torture it?
// Hopefully, this will speed up the test.

#ifndef __cplusplus

#error "This is not a C++ compiler"

// MSVC always sets __cplusplus to 199711L in older versions; newer versions
// only set it correctly if /Zc:__cplusplus is specified as well as a
// /std:c++NN switch:
// https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
#elif __cplusplus < 201103L && !defined _MSC_VER

#error "This is not a C++11 compiler"

#else

namespace cxx11
{

  namespace test_static_assert
  {

    template <typename T>
    struct check
    {
      static_assert(sizeof(int) <= sizeof(T), "not big enough");
    };

  }

  namespace test_final_override
  {

    struct Base
    {
      virtual ~Base() {}
      virtual void f() {}
    };

    struct Derived : public Base
    {
      virtual ~Derived() override {}
      virtual void f() override {}
    };

  }

  namespace test_double_right_angle_brackets
  {

    template < typename T >
    struct check {};

    typedef check<void> single_type;
    typedef check<check<void>> double_type;
    typedef check<check<check<void>>> triple_type;
    typedef check<check<check<check<void>>>> quadruple_type;

  }

  namespace test_decltype
  {

    int
    f()
    {
      int a = 1;
      decltype(a) b = 2;
      return a + b;
    }

  }

  namespace test_type_deduction
  {

    template < typename T1, typename T2 >
    struct is_same
    {
      static const bool value = false;
    };

    template < typename T >
    struct is_same<T, T>
    {
      static const bool value = true;
    };

    template < typename T1, typename T2 >
    auto
    add(T1 a1, T2 a2) -> decltype(a1 + a2)
    {
      return a1 + a2;
    }

    int
    test(const int c, volatile int v)
    {
      static_assert(is_same<int, decltype(0)>::value == true, "");
      static_assert(is_same<int, decltype(c)>::value == false, "");
      static_assert(is_same<int, decltype(v)>::value == false, "");
      auto ac = c;
      auto av = v;
      auto sumi = ac + av + 'x';
      auto sumf = ac + av + 1.0;
      static_assert(is_same<int, decltype(ac)>::value == true, "");
      static_assert(is_same<int, decltype(av)>::value == true, "");
      static_assert(is_same<int, decltype(sumi)>::value == true, "");
      static_assert(is_same<int, decltype(sumf)>::value == false, "");
      static_assert(is_same<int, decltype(add(c, v))>::value == true, "");
      return (sumf > 0.0) ? sumi : add(c, v);
    }

  }

  namespace test_noexcept
  {

    int f() { return 0; }
    int g() noexcept { return 0; }

    static_assert(noexcept(f()) == false, "");
    static_assert(noexcept(g()) == true, "");

  }

  namespace test_constexpr
  {

    template < typename CharT >
    unsigned long constexpr
    strlen_c_r(const CharT *const s, const unsigned long acc) noexcept
    {
      return *s ? strlen_c_r(s + 1, acc + 1) : acc;
    }

    template < typename CharT >
    unsigned long constexpr
    strlen_c(const CharT *const s) noexcept
    {
      return strlen_c_r(s, 0UL);
    }

    static_assert(strlen_c("") == 0UL, "");
    static_assert(strlen_c("1") == 1UL, "");
    static_assert(strlen_c("example") == 7UL, "");
    static_assert(strlen_c("another\0example") == 7UL, "");

  }

  namespace test_rvalue_references
  {

    template < int N >
    struct answer
    {
      static constexpr int value = N;
    };

    answer<1> f(int&)       { return answer<1>(); }
    answer<2> f(const int&) { return answer<2>(); }
    answer<3> f(int&&)      { return answer<3>(); }

    void
    test()
    {
      int i = 0;
      const int c = 0;
      static_assert(decltype(f(i))::value == 1, "");
      static_assert(decltype(f(c))::value == 2, "");
      static_assert(decltype(f(0))::value == 3, "");
    }

  }

  namespace test_uniform_initialization
  {

    struct test
    {
      static const int zero {};
      static const int one {1};
    };

    static_assert(test::zero == 0, "");
    static_assert(test::one == 1, "");

  }

  namespace test_lambdas
  {

    void
    test1()
    {
      auto lambda1 = [](){};
      auto lambda2 = lambda1;
      lambda1();
      lambda2();
    }

    int
    test2()
    {
      auto a = [](int i, int j){ return i + j; }(1, 2);
      auto b = []() -> int { return '0'; }();
      auto c = [=](){ return a + b; }();
      auto d = [&](){ return c; }();
      auto e = [a, &b](int x) mutable {
        const auto identity = [](int y){ return y; };
        for (auto i = 0; i < a; ++i)
          a += b--;
        return x + identity(a + b);
      }(0);
      return a + b + c + d + e;
    }

    int
    test3()
    {
      const auto nullary = [](){ return 0; };
      const auto unary = [](int x){ return x; };
      using nullary_t = decltype(nullary);
      using unary_t = decltype(unary);
      const auto higher1st = [](nullary_t f){ return f(); };
      const auto higher2nd = [unary](nullary_t f1){
        return [unary, f1](unary_t f2){ return f2(unary(f1())); };
      };
      return higher1st(nullary) + higher2nd(nullary)(unary);
    }

  }

  namespace test_variadic_templates
  {

    template <int...>
    struct sum;

    template <int N0, int... N1toN>
    struct sum<N0, N1toN...>
    {
      static constexpr auto value = N0 + sum<N1toN...>::value;
    };

    template <>
    struct sum<>
    {
      static constexpr auto value = 0;
    };

    static_assert(sum<>::value == 0, "");
    static_assert(sum<1>::value == 1, "");
    static_assert(sum<23>::value == 23, "");
    static_assert(sum<1, 2>::value == 3, "");
    static_assert(sum<5, 5, 11>::value == 21, "");
    static_assert(sum<2, 3, 5, 7, 11, 13>::value == 41, "");

  }

  // http://stackoverflow.com/questions/13728184/template-aliases-and-sfinae
  // Clang 3.1 fails with headers of libstd++ 4.8.3 when using std::function
  // because of this.
  namespace test_template_alias_sfinae
  {

    struct foo {};

    template<typename T>
    using member = typename T::member_type;

    template<typename T>
    void func(...) {}

    template<typename T>
    void func(member<T>*) {}

    void test();

    void test() { func<foo>(0); }

  }

}  // namespace cxx11

#endif  // __cplusplus >= 201103L

]])


dnl  Tests for new features in C++14

m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_14], [[

// If the compiler admits that it is not ready for C++14, why torture it?
// Hopefully, this will speed up the test.

#ifndef __cplusplus

#error "This is not a C++ compiler"

#elif __cplusplus < 201402L && !defined _MSC_VER

#error "This is not a C++14 compiler"

#else

namespace cxx14
{

  namespace test_polymorphic_lambdas
  {

    int
    test()
    {
      const auto lambda = [](auto&&... args){
        const auto istiny = [](auto x){
          return (sizeof(x) == 1UL) ? 1 : 0;
        };
        const int aretiny[] = { istiny(args)... };
        return aretiny[0];
      };
      return lambda(1, 1L, 1.0f, '1');
    }

  }

  namespace test_binary_literals
  {

    constexpr auto ivii = 0b0000000000101010;
    static_assert(ivii == 42, "wrong value");

  }

  namespace test_generalized_constexpr
  {

    template < typename CharT >
    constexpr unsigned long
    strlen_c(const CharT *const s) noexcept
    {
      auto length = 0UL;
      for (auto p = s; *p; ++p)
        ++length;
      return length;
    }

    static_assert(strlen_c("") == 0UL, "");
    static_assert(strlen_c("x") == 1UL, "");
    static_assert(strlen_c("test") == 4UL, "");
    static_assert(strlen_c("another\0test") == 7UL, "");

  }

  namespace test_lambda_init_capture
  {

    int
    test()
    {
      auto x = 0;
      const auto lambda1 = [a = x](int b){ return a + b; };
      const auto lambda2 = [a = lambda1(x)](){ return a; };
      return lambda2();
    }

  }

  namespace test_digit_separators
  {

    constexpr auto ten_million = 100'000'000;
    static_assert(ten_million == 100000000, "");

  }

  namespace test_return_type_deduction
  {

    auto f(int& x) { return x; }
    decltype(auto) g(int& x) { return x; }

    template < typename T1, typename T2 >
    struct is_same
    {
      static constexpr auto value = false;
    };

    template < typename T >
    struct is_same<T, T>
    {
      static constexpr auto value = true;
    };

    int
    test()
    {
      auto x = 0;
      static_assert(is_same<int, decltype(f(x))>::value, "");
      static_assert(is_same<int&, decltype(g(x))>::value, "");
      return x;
    }

  }

}  // namespace cxx14

#endif  // __cplusplus >= 201402L

]])


dnl  Tests for new features in C++17

m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[

// If the compiler admits that it is not ready for C++17, why torture it?
// Hopefully, this will speed up the test.

#ifndef __cplusplus

#error "This is not a C++ compiler"

#elif __cplusplus < 201703L && !defined _MSC_VER

#error "This is not a C++17 compiler"

#else

#include <initializer_list>
#include <utility>
#include <type_traits>

namespace cxx17
{

  namespace test_constexpr_lambdas
  {

    constexpr int foo = [](){return 42;}();

  }

  namespace test::nested_namespace::definitions
  {

  }

  namespace test_fold_expression
  {

    template<typename... Args>
    int multiply(Args... args)
    {
      return (args * ... * 1);
    }

    template<typename... Args>
    bool all(Args... args)
    {
      return (args && ...);
    }

  }

  namespace test_extended_static_assert
  {

    static_assert (true);

  }

  namespace test_auto_brace_init_list
  {

    auto foo = {5};
    auto bar {5};

    static_assert(std::is_same<std::initializer_list<int>, decltype(foo)>::value);
    static_assert(std::is_same<int, decltype(bar)>::value);
  }

  namespace test_typename_in_template_template_parameter
  {

    template<template<typename> typename X> struct D;

  }

  namespace test_fallthrough_nodiscard_maybe_unused_attributes
  {

    int f1()
    {
      return 42;
    }

    [[nodiscard]] int f2()
    {
      [[maybe_unused]] auto unused = f1();

      switch (f1())
      {
      case 17:
        f1();
        [[fallthrough]];
      case 42:
        f1();
      }
      return f1();
    }

  }

  namespace test_extended_aggregate_initialization
  {

    struct base1
    {
      int b1, b2 = 42;
    };

    struct base2
    {
      base2() {
        b3 = 42;
      }
      int b3;
    };

    struct derived : base1, base2
    {
        int d;
    };

    derived d1 {{1, 2}, {}, 4};  // full initialization
    derived d2 {{}, {}, 4};      // value-initialized bases

  }

  namespace test_general_range_based_for_loop
  {

    struct iter
    {
      int i;

      int& operator* ()
      {
        return i;
      }

      const int& operator* () const
      {
        return i;
      }

      iter& operator++()
      {
        ++i;
        return *this;
      }
    };

    struct sentinel
    {
      int i;
    };

    bool operator== (const iter& i, const sentinel& s)
    {
      return i.i == s.i;
    }

    bool operator!= (const iter& i, const sentinel& s)
    {
      return !(i == s);
    }

    struct range
    {
      iter begin() const
      {
        return {0};
      }

      sentinel end() const
      {
        return {5};
      }
    };

    void f()
    {
      range r {};

      for (auto i : r)
      {
        [[maybe_unused]] auto v = i;
      }
    }

  }

  namespace test_lambda_capture_asterisk_this_by_value
  {

    struct t
    {
      int i;
      int foo()
      {
        return [*this]()
        {
          return i;
        }();
      }
    };

  }

  namespace test_enum_class_construction
  {

    enum class byte : unsigned char
    {};

    byte foo {42};

  }

  namespace test_constexpr_if
  {

    template <bool cond>
    int f ()
    {
      if constexpr(cond)
      {
        return 13;
      }
      else
      {
        return 42;
      }
    }

  }

  namespace test_selection_statement_with_initializer
  {

    int f()
    {
      return 13;
    }

    int f2()
    {
      if (auto i = f(); i > 0)
      {
        return 3;
      }

      switch (auto i = f(); i + 4)
      {
      case 17:
        return 2;

      default:
        return 1;
      }
    }

  }

  namespace test_template_argument_deduction_for_class_templates
  {

    template <typename T1, typename T2>
    struct pair
    {
      pair (T1 p1, T2 p2)
        : m1 {p1},
          m2 {p2}
      {}

      T1 m1;
      T2 m2;
    };

    void f()
    {
      [[maybe_unused]] auto p = pair{13, 42u};
    }

  }

  namespace test_non_type_auto_template_parameters
  {

    template <auto n>
    struct B
    {};

    B<5> b1;
    B<'a'> b2;

  }

  namespace test_structured_bindings
  {

    int arr[2] = { 1, 2 };
    std::pair<int, int> pr = { 1, 2 };

    auto f1() -> int(&)[2]
    {
      return arr;
    }

    auto f2() -> std::pair<int, int>&
    {
      return pr;
    }

    struct S
    {
      int x1 : 2;
      volatile double y1;
    };

    S f3()
    {
      return {};
    }

    auto [ x1, y1 ] = f1();
    auto& [ xr1, yr1 ] = f1();
    auto [ x2, y2 ] = f2();
    auto& [ xr2, yr2 ] = f2();
    const auto [ x3, y3 ] = f3();

  }

  namespace test_exception_spec_type_system
  {

    struct Good {};
    struct Bad {};

    void g1() noexcept;
    void g2();

    template<typename T>
    Bad
    f(T*, T*);

    template<typename T1, typename T2>
    Good
    f(T1*, T2*);

    static_assert (std::is_same_v<Good, decltype(f(g1, g2))>);

  }

  namespace test_inline_variables
  {

    template<class T> void f(T)
    {}

    template<class T> inline T g(T)
    {
      return T{};
    }

    template<> inline void f<>(int)
    {}

    template<> int g<>(int)
    {
      return 5;
    }

  }

}  // namespace cxx17

#endif  // __cplusplus < 201703L && !defined _MSC_VER

]])


dnl  Tests for new features in C++20

m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_20], [[

#ifndef __cplusplus

#error "This is not a C++ compiler"

#elif __cplusplus < 202002L && !defined _MSC_VER

#error "This is not a C++20 compiler"

#else

#include <version>

namespace cxx20
{

// As C++20 supports feature test macros in the standard, there is no
// immediate need to actually test for feature availability on the
// Autoconf side.

}  // namespace cxx20

#endif  // __cplusplus < 202002L && !defined _MSC_VER

]])

# =============================================================================
#  https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_11.html
# =============================================================================
#
# SYNOPSIS
#
#   AX_CXX_COMPILE_STDCXX_11([ext|noext], [mandatory|optional])
#
# DESCRIPTION
#
#   Check for baseline language coverage in the compiler for the C++11
#   standard; if necessary, add switches to CXX and CXXCPP to enable
#   support.
#
#   This macro is a convenience alias for calling the AX_CXX_COMPILE_STDCXX
#   macro with the version set to C++11.  The two optional arguments are
#   forwarded literally as the second and third argument respectively.
#   Please see the documentation for the AX_CXX_COMPILE_STDCXX macro for
#   more information.  If you want to use this macro, you also need to
#   download the ax_cxx_compile_stdcxx.m4 file.
#
# LICENSE
#
#   Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
#   Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
#   Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
#   Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
#   Copyright (c) 2015 Paul Norman <penorman@mac.com>
#   Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
#
#   Copying and distribution of this file, with or without modification, are
#   permitted in any medium without royalty provided the copyright notice
#   and this notice are preserved. This file is offered as-is, without any
#   warranty.

#serial 18

AX_REQUIRE_DEFINED([AX_CXX_COMPILE_STDCXX])
AC_DEFUN([AX_CXX_COMPILE_STDCXX_11], [AX_CXX_COMPILE_STDCXX([11], [$1], [$2])])

# Increment this whenever this file is changed.
#serial 2

dnl GLIB_GSETTINGS
dnl Defines GSETTINGS_SCHEMAS_INSTALL which controls whether
dnl the schema should be compiled
dnl

AC_DEFUN([GLIB_GSETTINGS],
[
  dnl We can't use PKG_PREREQ because that needs 0.29.
  m4_ifndef([PKG_PROG_PKG_CONFIG],
            [pkg.m4 version 0.28 or later is required])

  m4_pattern_allow([AM_V_GEN])
  AC_ARG_ENABLE(schemas-compile,
                AS_HELP_STRING([--disable-schemas-compile],
                               [Disable regeneration of gschemas.compiled on install]),
                [case ${enableval} in
                  yes) GSETTINGS_DISABLE_SCHEMAS_COMPILE=""  ;;
                  no)  GSETTINGS_DISABLE_SCHEMAS_COMPILE="1" ;;
                  *) AC_MSG_ERROR([bad value ${enableval} for --enable-schemas-compile]) ;;
                 esac])
  AC_SUBST([GSETTINGS_DISABLE_SCHEMAS_COMPILE])
  PKG_PROG_PKG_CONFIG([0.16])
  AC_SUBST(gsettingsschemadir, [${datadir}/glib-2.0/schemas])
  AS_IF([test x$cross_compiling != xyes],
        [PKG_CHECK_VAR([GLIB_COMPILE_SCHEMAS], [gio-2.0], [glib_compile_schemas])],
        [AC_PATH_PROG([GLIB_COMPILE_SCHEMAS], [glib-compile-schemas])])
  AC_SUBST(GLIB_COMPILE_SCHEMAS)
  if test "x$GLIB_COMPILE_SCHEMAS" = "x"; then
    ifelse([$2],,[AC_MSG_ERROR([glib-compile-schemas not found.])],[$2])
  else
    ifelse([$1],,[:],[$1])
  fi

  GSETTINGS_RULES='
.PHONY : uninstall-gsettings-schemas install-gsettings-schemas clean-gsettings-schemas

mostlyclean-am: clean-gsettings-schemas

gsettings__enum_file = $(addsuffix .enums.xml,$(gsettings_ENUM_NAMESPACE))

%.gschema.valid: %.gschema.xml $(gsettings__enum_file)
	$(AM_V_GEN) $(GLIB_COMPILE_SCHEMAS) --strict --dry-run $(addprefix --schema-file=,$(gsettings__enum_file)) --schema-file=$< && mkdir -p [$](@D) && touch [$]@

all-am: $(gsettings_SCHEMAS:.xml=.valid)
uninstall-am: uninstall-gsettings-schemas
install-data-am: install-gsettings-schemas

.SECONDARY: $(gsettings_SCHEMAS)

install-gsettings-schemas: $(gsettings_SCHEMAS) $(gsettings__enum_file)
	@$(NORMAL_INSTALL)
	if test -n "$^"; then \
		test -z "$(gsettingsschemadir)" || $(MKDIR_P) "$(DESTDIR)$(gsettingsschemadir)"; \
		$(INSTALL_DATA) $^ "$(DESTDIR)$(gsettingsschemadir)"; \
		test -n "$(GSETTINGS_DISABLE_SCHEMAS_COMPILE)$(DESTDIR)" || $(GLIB_COMPILE_SCHEMAS) $(gsettingsschemadir); \
	fi

uninstall-gsettings-schemas:
	@$(NORMAL_UNINSTALL)
	@list='\''$(gsettings_SCHEMAS) $(gsettings__enum_file)'\''; test -n "$(gsettingsschemadir)" || list=; \
	files=`for p in $$list; do echo $$p; done | sed -e '\''s|^.*/||'\''`; \
	test -n "$$files" || exit 0; \
	echo " ( cd '\''$(DESTDIR)$(gsettingsschemadir)'\'' && rm -f" $$files ")"; \
	cd "$(DESTDIR)$(gsettingsschemadir)" && rm -f $$files
	test -n "$(GSETTINGS_DISABLE_SCHEMAS_COMPILE)$(DESTDIR)" || $(GLIB_COMPILE_SCHEMAS) $(gsettingsschemadir)

clean-gsettings-schemas:
	rm -f $(gsettings_SCHEMAS:.xml=.valid) $(gsettings__enum_file)

ifdef gsettings_ENUM_NAMESPACE
$(gsettings__enum_file): $(gsettings_ENUM_FILES)
	$(AM_V_GEN) glib-mkenums --comments '\''<!-- @comment@ -->'\'' --fhead "<schemalist>" --vhead "  <@type@ id='\''$(gsettings_ENUM_NAMESPACE).@EnumName@'\''>" --vprod "    <value nick='\''@valuenick@'\'' value='\''@valuenum@'\''/>" --vtail "  </@type@>" --ftail "</schemalist>" [$]^ > [$]@.tmp && mv [$]@.tmp [$]@
endif
'
  _GSETTINGS_SUBST(GSETTINGS_RULES)
])

dnl _GSETTINGS_SUBST(VARIABLE)
dnl Abstract macro to do either _AM_SUBST_NOTMAKE or AC_SUBST
AC_DEFUN([_GSETTINGS_SUBST],
[
AC_SUBST([$1])
m4_ifdef([_AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE([$1])])
]
)

# intlmacosx.m4
# serial 10 (gettext-0.23)
dnl Copyright (C) 2004-2014, 2016, 2019-2024 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This file is offered as-is, without any warranty.
dnl
dnl This file can be used in projects which are not available under
dnl the GNU General Public License or the GNU Lesser General Public
dnl License but which still want to provide support for the GNU gettext
dnl functionality.
dnl Please note that the actual code of the GNU gettext library is covered
dnl by the GNU Lesser General Public License, and the rest of the GNU
dnl gettext package is covered by the GNU General Public License.
dnl They are *not* in the public domain.

dnl Checks for special options needed on Mac OS X.
dnl Defines INTL_MACOSX_LIBS.
AC_DEFUN([gt_INTL_MACOSX],
[
  dnl Check for API introduced in Mac OS X 10.4.
  AC_CACHE_CHECK([for CFPreferencesCopyAppValue],
    [gt_cv_func_CFPreferencesCopyAppValue],
    [gt_saved_LIBS="$LIBS"
     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
     AC_LINK_IFELSE(
       [AC_LANG_PROGRAM(
          [[#include <CoreFoundation/CFPreferences.h>]],
          [[CFPreferencesCopyAppValue(NULL, NULL)]])],
       [gt_cv_func_CFPreferencesCopyAppValue=yes],
       [gt_cv_func_CFPreferencesCopyAppValue=no])
     LIBS="$gt_saved_LIBS"])
  if test $gt_cv_func_CFPreferencesCopyAppValue = yes; then
    AC_DEFINE([HAVE_CFPREFERENCESCOPYAPPVALUE], [1],
      [Define to 1 if you have the Mac OS X function CFPreferencesCopyAppValue in the CoreFoundation framework.])
  fi
  dnl Don't check for the API introduced in Mac OS X 10.5, CFLocaleCopyCurrent,
  dnl because in macOS 10.13.4 it has the following behaviour:
  dnl When two or more languages are specified in the
  dnl "System Preferences > Language & Region > Preferred Languages" panel,
  dnl it returns en_CC where CC is the territory (even when English is not among
  dnl the preferred languages!).  What we want instead is what
  dnl CFLocaleCopyCurrent returned in earlier macOS releases and what
  dnl CFPreferencesCopyAppValue still returns, namely ll_CC where ll is the
  dnl first among the preferred languages and CC is the territory.
  AC_CACHE_CHECK([for CFLocaleCopyPreferredLanguages], [gt_cv_func_CFLocaleCopyPreferredLanguages],
    [gt_saved_LIBS="$LIBS"
     LIBS="$LIBS -Wl,-framework -Wl,CoreFoundation"
     AC_LINK_IFELSE(
       [AC_LANG_PROGRAM(
          [[#include <CoreFoundation/CFLocale.h>]],
          [[CFLocaleCopyPreferredLanguages();]])],
       [gt_cv_func_CFLocaleCopyPreferredLanguages=yes],
       [gt_cv_func_CFLocaleCopyPreferredLanguages=no])
     LIBS="$gt_saved_LIBS"])
  if test $gt_cv_func_CFLocaleCopyPreferredLanguages = yes; then
    AC_DEFINE([HAVE_CFLOCALECOPYPREFERREDLANGUAGES], [1],
      [Define to 1 if you have the Mac OS X function CFLocaleCopyPreferredLanguages in the CoreFoundation framework.])
  fi
  INTL_MACOSX_LIBS=
  if test $gt_cv_func_CFPreferencesCopyAppValue = yes \
     || test $gt_cv_func_CFLocaleCopyPreferredLanguages = yes; then
    dnl Starting with macOS version 14, CoreFoundation relies on CoreServices,
    dnl and we have to link it in explicitly, otherwise an exception
    dnl NSInvalidArgumentException "unrecognized selector sent to instance"
    dnl occurs.
    INTL_MACOSX_LIBS="-Wl,-framework -Wl,CoreFoundation -Wl,-framework -Wl,CoreServices"
  fi
  AC_SUBST([INTL_MACOSX_LIBS])
])

dnl Autoconf macros for libassuan
dnl Copyright (C) 2002, 2003, 2011 Free Software Foundation, Inc.
dnl
dnl This file is free software; as a special exception the author gives
dnl unlimited permission to copy and/or distribute it, with or without
dnl modifications, as long as this notice is preserved.
dnl
dnl This file is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
dnl implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
dnl SPDX-License-Identifier: FSFULLR
# Last-changed: 2024-07-11

dnl
dnl Find gpgrt-config, which uses .pc file
dnl (minimum pkg-config functionality, supporting cross build)
dnl
dnl _AM_PATH_GPGRT_CONFIG
AC_DEFUN([_AM_PATH_GPGRT_CONFIG],[dnl
  AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no, [$prefix/bin:$PATH])
  if test "$GPGRT_CONFIG" != "no"; then
    # Determine gpgrt_libdir
    #
    # Get the prefix of gpgrt-config assuming it's something like:
    #   <PREFIX>/bin/gpgrt-config
    gpgrt_prefix=${GPGRT_CONFIG%/*/*}
    possible_libdir1=${gpgrt_prefix}/lib
    # Determine by using system libdir-format with CC, it's like:
    #   Normal style: /usr/lib
    #   GNU cross style: /usr/<triplet>/lib
    #   Debian style: /usr/lib/<multiarch-name>
    #   Fedora/openSUSE style: /usr/lib, /usr/lib32 or /usr/lib64
    # It is assumed that CC is specified to the one of host on cross build.
    if libdir_candidates=$(${CC:-cc} -print-search-dirs | \
          sed -n -e "/^libraries/{s/libraries: =//;s/:/\\
/g;p;}"); then
      # From the output of -print-search-dirs, select valid pkgconfig dirs.
      libdir_candidates=$(for dir in $libdir_candidates; do
        if p=$(cd $dir 2>/dev/null && pwd); then
          test -d "$p/pkgconfig" && echo $p;
        fi
      done)

      for possible_libdir0 in $libdir_candidates; do
        # possible_libdir0:
        #   Fallback candidate, the one of system-installed (by $CC)
        #   (/usr/<triplet>/lib, /usr/lib/<multiarch-name> or /usr/lib32)
        # possible_libdir1:
        #   Another candidate, user-locally-installed
        #   (<gpgrt_prefix>/lib)
        # possible_libdir2
        #   Most preferred
        #   (<gpgrt_prefix>/<triplet>/lib,
        #    <gpgrt_prefix>/lib/<multiarch-name> or <gpgrt_prefix>/lib32)
        if test "${possible_libdir0##*/}" = "lib"; then
          possible_prefix0=${possible_libdir0%/lib}
          possible_prefix0_triplet=${possible_prefix0##*/}
          if test -z "$possible_prefix0_triplet"; then
            continue
          fi
          possible_libdir2=${gpgrt_prefix}/$possible_prefix0_triplet/lib
        else
          possible_prefix0=${possible_libdir0%%/lib*}
          possible_libdir2=${gpgrt_prefix}${possible_libdir0#$possible_prefix0}
        fi
        if test -f ${possible_libdir2}/pkgconfig/gpg-error.pc; then
          gpgrt_libdir=${possible_libdir2}
        elif test -f ${possible_libdir1}/pkgconfig/gpg-error.pc; then
          gpgrt_libdir=${possible_libdir1}
        elif test -f ${possible_libdir0}/pkgconfig/gpg-error.pc; then
          gpgrt_libdir=${possible_libdir0}
        fi
        if test -n "$gpgrt_libdir"; then break; fi
      done
    fi
    if test -z "$gpgrt_libdir"; then
      # No valid pkgconfig dir in any of the system directories, fallback
      gpgrt_libdir=${possible_libdir1}
    fi
  else
    unset GPGRT_CONFIG
  fi

  if test -n "$gpgrt_libdir"; then
    # Add the --libdir option to GPGRT_CONFIG
    GPGRT_CONFIG="$GPGRT_CONFIG --libdir=$gpgrt_libdir"
    # Make sure if gpgrt-config really works, by testing config gpg-error
    if ! $GPGRT_CONFIG gpg-error --exists; then
      # If it doesn't work, clear the GPGRT_CONFIG variable.
      unset GPGRT_CONFIG
    fi
  else
    # GPGRT_CONFIG found but no suitable dir for --libdir found.
    # This is a failure.  Clear the GPGRT_CONFIG variable.
    unset GPGRT_CONFIG
  fi
])

dnl
dnl Common code used for libassuan detection [internal]
dnl Returns ok set to yes or no.
dnl
AC_DEFUN([_AM_PATH_LIBASSUAN_COMMON],
[ AC_REQUIRE([AC_CANONICAL_HOST])dnl
  AC_REQUIRE([_AM_PATH_GPGRT_CONFIG])dnl
  AC_ARG_WITH(libassuan-prefix,
              AS_HELP_STRING([--with-libassuan-prefix=PFX],
                             [prefix where LIBASSUAN is installed (optional)]),
     libassuan_config_prefix="$withval", libassuan_config_prefix="")
  if test x$libassuan_config_prefix != x ; then
    if test x${LIBASSUAN_CONFIG+set} != xset ; then
      LIBASSUAN_CONFIG=$libassuan_config_prefix/bin/libassuan-config
    fi
  fi

  use_gpgrt_config=""
  if test x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
    if $GPGRT_CONFIG libassuan --exists; then
      LIBASSUAN_CONFIG="$GPGRT_CONFIG libassuan"
      AC_MSG_NOTICE([Use gpgrt-config as libassuan-config])
      use_gpgrt_config=yes
    fi
  fi
  if test -z "$use_gpgrt_config"; then
    AC_PATH_PROG(LIBASSUAN_CONFIG, libassuan-config, no)
  fi

  tmp=ifelse([$1], ,1:0.9.2,$1)
  if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
    req_libassuan_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`
    min_libassuan_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`
  else
    req_libassuan_api=0
    min_libassuan_version="$tmp"
  fi

  AC_MSG_CHECKING(for LIBASSUAN - version >= $min_libassuan_version)
  ok=no
  if test "$LIBASSUAN_CONFIG" != "no"; then
    req_major=`echo $min_libassuan_version | \
               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
    req_minor=`echo $min_libassuan_version | \
               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
    req_micro=`echo $min_libassuan_version | \
               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`

    if test -z "$use_gpgrt_config"; then
      libassuan_config_version=`$LIBASSUAN_CONFIG --version`
    else
      libassuan_config_version=`$LIBASSUAN_CONFIG --modversion`
    fi
    major=`echo $libassuan_config_version | \
               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
    minor=`echo $libassuan_config_version | \
               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
    micro=`echo $libassuan_config_version | \
               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\3/'`

    if test "$major" -gt "$req_major"; then
        ok=yes
    else
        if test "$major" -eq "$req_major"; then
            if test "$minor" -gt "$req_minor"; then
               ok=yes
            else
               if test "$minor" -eq "$req_minor"; then
                   if test "$micro" -ge "$req_micro"; then
                     ok=yes
                   fi
               fi
            fi
        fi
    fi
  fi

  if test $ok = yes; then
    AC_MSG_RESULT([yes ($libassuan_config_version)])
    AC_DEFINE_UNQUOTED(LIBASSUAN_API_REQUESTED, $req_libassuan_api, [Requested API version for libassuan])
  else
    AC_MSG_RESULT(no)
  fi

  if test $ok = yes; then
    if test "$req_libassuan_api" -gt 0 ; then
      if test -z "$use_gpgrt_config"; then
        tmp=`$LIBASSUAN_CONFIG --api-version 2>/dev/null || echo 0`
      else
        tmp=`$LIBASSUAN_CONFIG --variable=api_version 2>/dev/null || echo 0`
      fi
      if test "$tmp" -gt 0 ; then
        AC_MSG_CHECKING([LIBASSUAN API version])
        if test "$req_libassuan_api" -eq "$tmp" ; then
          AC_MSG_RESULT(okay)
        elif test "$req_libassuan_api" -eq 2 -a "$tmp" -eq 3; then
          AC_MSG_RESULT(okay)
        else
          ok=no
          AC_MSG_RESULT([does not match.  want=$req_libassuan_api got=$tmp.])
        fi
      fi
    fi
  fi

  if test $ok = yes; then
    if test x"$host" != x ; then
      if test -z "$use_gpgrt_config"; then
        libassuan_config_host=`$LIBASSUAN_CONFIG --host 2>/dev/null || echo none`
      else
        libassuan_config_host=`$LIBASSUAN_CONFIG --variable=host 2>/dev/null || echo none`
      fi
      if test x"$libassuan_config_host" != xnone ; then
        if test x"$libassuan_config_host" != x"$host" ; then
  AC_MSG_WARN([[
***
*** The config script "$LIBASSUAN_CONFIG" was
*** built for $libassuan_config_host and thus may not match the
*** used host $host.
*** You may want to use the configure option --with-libassuan-prefix
*** to specify a matching config script.
***]])
        fi
      fi
    fi
  fi
])

dnl AM_CHECK_LIBASSUAN([MINIMUM-VERSION,
dnl                    [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
dnl Test whether libassuan has at least MINIMUM-VERSION. This is
dnl used to test for features only available in newer versions.
dnl
AC_DEFUN([AM_CHECK_LIBASSUAN],
[ _AM_PATH_LIBASSUAN_COMMON($1)
  if test $ok = yes; then
    ifelse([$2], , :, [$2])
  else
    ifelse([$3], , :, [$3])
  fi
])




dnl AM_PATH_LIBASSUAN([MINIMUM-VERSION,
dnl                   [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
dnl Test for libassuan and define LIBASSUAN_CFLAGS and LIBASSUAN_LIBS
dnl
AC_DEFUN([AM_PATH_LIBASSUAN],
[ _AM_PATH_LIBASSUAN_COMMON($1)
  if test $ok = yes; then
    LIBASSUAN_CFLAGS=`$LIBASSUAN_CONFIG --cflags`
    LIBASSUAN_LIBS=`$LIBASSUAN_CONFIG --libs`
    ifelse([$2], , :, [$2])
  else
    LIBASSUAN_CFLAGS=""
    LIBASSUAN_LIBS=""
    ifelse([$3], , :, [$3])
  fi
  AC_SUBST(LIBASSUAN_CFLAGS)
  AC_SUBST(LIBASSUAN_LIBS)
])

# pkg.m4 - Macros to locate and use pkg-config.   -*- Autoconf -*-
# serial 12 (pkg-config-0.29.2)

dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl
dnl This program is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dnl General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
dnl 02111-1307, USA.
dnl
dnl As a special exception to the GNU General Public License, if you
dnl distribute this file as part of a program that contains a
dnl configuration script generated by Autoconf, you may include it under
dnl the same distribution terms that you use for the rest of that
dnl program.

dnl PKG_PREREQ(MIN-VERSION)
dnl -----------------------
dnl Since: 0.29
dnl
dnl Verify that the version of the pkg-config macros are at least
dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's
dnl installed version of pkg-config, this checks the developer's version
dnl of pkg.m4 when generating configure.
dnl
dnl To ensure that this macro is defined, also add:
dnl m4_ifndef([PKG_PREREQ],
dnl     [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])])
dnl
dnl See the "Since" comment for each macro you use to see what version
dnl of the macros you require.
m4_defun([PKG_PREREQ],
[m4_define([PKG_MACROS_VERSION], [0.29.2])
m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
    [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
])dnl PKG_PREREQ

dnl PKG_PROG_PKG_CONFIG([MIN-VERSION])
dnl ----------------------------------
dnl Since: 0.16
dnl
dnl Search for the pkg-config tool and set the PKG_CONFIG variable to
dnl first found in the path. Checks that the version of pkg-config found
dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is
dnl used since that's the first version where most current features of
dnl pkg-config existed.
AC_DEFUN([PKG_PROG_PKG_CONFIG],
[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])

if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
fi
if test -n "$PKG_CONFIG"; then
	_pkg_min_version=m4_default([$1], [0.9.0])
	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
		AC_MSG_RESULT([yes])
	else
		AC_MSG_RESULT([no])
		PKG_CONFIG=""
	fi
fi[]dnl
])dnl PKG_PROG_PKG_CONFIG

dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl -------------------------------------------------------------------
dnl Since: 0.18
dnl
dnl Check to see whether a particular set of modules exists. Similar to
dnl PKG_CHECK_MODULES(), but does not set variables or print errors.
dnl
dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
dnl only at the first occurrence in configure.ac, so if the first place
dnl it's called might be skipped (such as if it is within an "if", you
dnl have to call PKG_CHECK_EXISTS manually
AC_DEFUN([PKG_CHECK_EXISTS],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
if test -n "$PKG_CONFIG" && \
    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
  m4_default([$2], [:])
m4_ifvaln([$3], [else
  $3])dnl
fi])

dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
dnl ---------------------------------------------
dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting
dnl pkg_failed based on the result.
m4_define([_PKG_CONFIG],
[if test -n "$$1"; then
    pkg_cv_[]$1="$$1"
 elif test -n "$PKG_CONFIG"; then
    PKG_CHECK_EXISTS([$3],
                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
		      test "x$?" != "x0" && pkg_failed=yes ],
		     [pkg_failed=yes])
 else
    pkg_failed=untried
fi[]dnl
])dnl _PKG_CONFIG

dnl _PKG_SHORT_ERRORS_SUPPORTED
dnl ---------------------------
dnl Internal check to see if pkg-config supports short errors.
AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
        _pkg_short_errors_supported=yes
else
        _pkg_short_errors_supported=no
fi[]dnl
])dnl _PKG_SHORT_ERRORS_SUPPORTED


dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
dnl   [ACTION-IF-NOT-FOUND])
dnl --------------------------------------------------------------
dnl Since: 0.4.0
dnl
dnl Note that if there is a possibility the first call to
dnl PKG_CHECK_MODULES might not happen, you should be sure to include an
dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
AC_DEFUN([PKG_CHECK_MODULES],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl

pkg_failed=no
AC_MSG_CHECKING([for $2])

_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
_PKG_CONFIG([$1][_LIBS], [libs], [$2])

m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
and $1[]_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.])

if test $pkg_failed = yes; then
        AC_MSG_RESULT([no])
        _PKG_SHORT_ERRORS_SUPPORTED
        if test $_pkg_short_errors_supported = yes; then
                $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
        else
                $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
        fi
        # Put the nasty error message in config.log where it belongs
        echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD

        m4_default([$4], [AC_MSG_ERROR(
[Package requirements ($2) were not met:

$$1_PKG_ERRORS

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

_PKG_TEXT])[]dnl
        ])
elif test $pkg_failed = untried; then
        AC_MSG_RESULT([no])
        m4_default([$4], [AC_MSG_FAILURE(
[The pkg-config script could not be found or is too old.  Make sure it
is in your PATH or set the PKG_CONFIG environment variable to the full
path to pkg-config.

_PKG_TEXT

To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
        ])
else
        $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
        $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
        AC_MSG_RESULT([yes])
        $3
fi[]dnl
])dnl PKG_CHECK_MODULES


dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
dnl   [ACTION-IF-NOT-FOUND])
dnl ---------------------------------------------------------------------
dnl Since: 0.29
dnl
dnl Checks for existence of MODULES and gathers its build flags with
dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags
dnl and VARIABLE-PREFIX_LIBS from --libs.
dnl
dnl Note that if there is a possibility the first call to
dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to
dnl include an explicit call to PKG_PROG_PKG_CONFIG in your
dnl configure.ac.
AC_DEFUN([PKG_CHECK_MODULES_STATIC],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
_save_PKG_CONFIG=$PKG_CONFIG
PKG_CONFIG="$PKG_CONFIG --static"
PKG_CHECK_MODULES($@)
PKG_CONFIG=$_save_PKG_CONFIG[]dnl
])dnl PKG_CHECK_MODULES_STATIC


dnl PKG_INSTALLDIR([DIRECTORY])
dnl -------------------------
dnl Since: 0.27
dnl
dnl Substitutes the variable pkgconfigdir as the location where a module
dnl should install pkg-config .pc files. By default the directory is
dnl $libdir/pkgconfig, but the default can be changed by passing
dnl DIRECTORY. The user can override through the --with-pkgconfigdir
dnl parameter.
AC_DEFUN([PKG_INSTALLDIR],
[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
m4_pushdef([pkg_description],
    [pkg-config installation directory @<:@]pkg_default[@:>@])
AC_ARG_WITH([pkgconfigdir],
    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
    [with_pkgconfigdir=]pkg_default)
AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
m4_popdef([pkg_default])
m4_popdef([pkg_description])
])dnl PKG_INSTALLDIR


dnl PKG_NOARCH_INSTALLDIR([DIRECTORY])
dnl --------------------------------
dnl Since: 0.27
dnl
dnl Substitutes the variable noarch_pkgconfigdir as the location where a
dnl module should install arch-independent pkg-config .pc files. By
dnl default the directory is $datadir/pkgconfig, but the default can be
dnl changed by passing DIRECTORY. The user can override through the
dnl --with-noarch-pkgconfigdir parameter.
AC_DEFUN([PKG_NOARCH_INSTALLDIR],
[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
m4_pushdef([pkg_description],
    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
AC_ARG_WITH([noarch-pkgconfigdir],
    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
    [with_noarch_pkgconfigdir=]pkg_default)
AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
m4_popdef([pkg_default])
m4_popdef([pkg_description])
])dnl PKG_NOARCH_INSTALLDIR


dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl -------------------------------------------
dnl Since: 0.28
dnl
dnl Retrieves the value of the pkg-config variable for the given module.
AC_DEFUN([PKG_CHECK_VAR],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl

_PKG_CONFIG([$1], [variable="][$3]["], [$2])
AS_VAR_COPY([$1], [pkg_cv_][$1])

AS_VAR_IF([$1], [""], [$5], [$4])dnl
])dnl PKG_CHECK_VAR

dnl PKG_WITH_MODULES(VARIABLE-PREFIX, MODULES,
dnl   [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND],
dnl   [DESCRIPTION], [DEFAULT])
dnl ------------------------------------------
dnl
dnl Prepare a "--with-" configure option using the lowercase
dnl [VARIABLE-PREFIX] name, merging the behaviour of AC_ARG_WITH and
dnl PKG_CHECK_MODULES in a single macro.
AC_DEFUN([PKG_WITH_MODULES],
[
m4_pushdef([with_arg], m4_tolower([$1]))

m4_pushdef([description],
           [m4_default([$5], [build with ]with_arg[ support])])

m4_pushdef([def_arg], [m4_default([$6], [auto])])
m4_pushdef([def_action_if_found], [AS_TR_SH([with_]with_arg)=yes])
m4_pushdef([def_action_if_not_found], [AS_TR_SH([with_]with_arg)=no])

m4_case(def_arg,
            [yes],[m4_pushdef([with_without], [--without-]with_arg)],
            [m4_pushdef([with_without],[--with-]with_arg)])

AC_ARG_WITH(with_arg,
     AS_HELP_STRING(with_without, description[ @<:@default=]def_arg[@:>@]),,
    [AS_TR_SH([with_]with_arg)=def_arg])

AS_CASE([$AS_TR_SH([with_]with_arg)],
            [yes],[PKG_CHECK_MODULES([$1],[$2],$3,$4)],
            [auto],[PKG_CHECK_MODULES([$1],[$2],
                                        [m4_n([def_action_if_found]) $3],
                                        [m4_n([def_action_if_not_found]) $4])])

m4_popdef([with_arg])
m4_popdef([description])
m4_popdef([def_arg])

])dnl PKG_WITH_MODULES

dnl PKG_HAVE_WITH_MODULES(VARIABLE-PREFIX, MODULES,
dnl   [DESCRIPTION], [DEFAULT])
dnl -----------------------------------------------
dnl
dnl Convenience macro to trigger AM_CONDITIONAL after PKG_WITH_MODULES
dnl check._[VARIABLE-PREFIX] is exported as make variable.
AC_DEFUN([PKG_HAVE_WITH_MODULES],
[
PKG_WITH_MODULES([$1],[$2],,,[$3],[$4])

AM_CONDITIONAL([HAVE_][$1],
               [test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"])
])dnl PKG_HAVE_WITH_MODULES

dnl PKG_HAVE_DEFINE_WITH_MODULES(VARIABLE-PREFIX, MODULES,
dnl   [DESCRIPTION], [DEFAULT])
dnl ------------------------------------------------------
dnl
dnl Convenience macro to run AM_CONDITIONAL and AC_DEFINE after
dnl PKG_WITH_MODULES check. HAVE_[VARIABLE-PREFIX] is exported as make
dnl and preprocessor variable.
AC_DEFUN([PKG_HAVE_DEFINE_WITH_MODULES],
[
PKG_HAVE_WITH_MODULES([$1],[$2],[$3],[$4])

AS_IF([test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"],
        [AC_DEFINE([HAVE_][$1], 1, [Enable ]m4_tolower([$1])[ support])])
])dnl PKG_HAVE_DEFINE_WITH_MODULES

# Copyright (C) 2002-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_AUTOMAKE_VERSION(VERSION)
# ----------------------------
# Automake X.Y traces this macro to ensure aclocal.m4 has been
# generated from the m4 files accompanying Automake X.Y.
# (This private macro should not be called outside this file.)
AC_DEFUN([AM_AUTOMAKE_VERSION],
[am__api_version='1.17'
dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
dnl require some minimum version.  Point them to the right macro.
m4_if([$1], [1.17], [],
      [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
])

# _AM_AUTOCONF_VERSION(VERSION)
# -----------------------------
# aclocal traces this macro to find the Autoconf version.
# This is a private macro too.  Using m4_define simplifies
# the logic in aclocal, which can simply ignore this definition.
m4_define([_AM_AUTOCONF_VERSION], [])

# AM_SET_CURRENT_AUTOMAKE_VERSION
# -------------------------------
# Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
# This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
[AM_AUTOMAKE_VERSION([1.17])dnl
m4_ifndef([AC_AUTOCONF_VERSION],
  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
_AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])

# AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-

# Copyright (C) 2001-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets
# $ac_aux_dir to '$srcdir/foo'.  In other projects, it is set to
# '$srcdir', '$srcdir/..', or '$srcdir/../..'.
#
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# tool from the auxiliary directory.  The problem is that $srcdir (and
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#    fails when called from a subdirectory in a VPATH build with
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# harmless because $srcdir is '.', but things will broke when you
# start a VPATH build or use an absolute $srcdir.
#
# So we could use something similar to $top_srcdir/$ac_aux_dir/missing,
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#   MISSING="\${SHELL} $am_aux_dir/missing"
# This will work as long as MISSING is not called from configure, because
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# However there are other variables, like CC, which are often used in
# configure, and could therefore not use this "fixed" $ac_aux_dir.
#
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# absolute PATH.  The drawback is that using absolute paths prevent a
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AC_DEFUN([AM_AUX_DIR_EXPAND],
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
# Expand $ac_aux_dir to an absolute path.
am_aux_dir=`cd "$ac_aux_dir" && pwd`
])

# AM_CONDITIONAL                                            -*- Autoconf -*-

# Copyright (C) 1997-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_CONDITIONAL(NAME, SHELL-CONDITION)
# -------------------------------------
# Define a conditional.
AC_DEFUN([AM_CONDITIONAL],
[AC_PREREQ([2.52])dnl
 m4_if([$1], [TRUE],  [AC_FATAL([$0: invalid condition: $1])],
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AC_SUBST([$1_TRUE])dnl
AC_SUBST([$1_FALSE])dnl
_AM_SUBST_NOTMAKE([$1_TRUE])dnl
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m4_define([_AM_COND_VALUE_$1], [$2])dnl
if $2; then
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fi
AC_CONFIG_COMMANDS_PRE(
[if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then
  AC_MSG_ERROR([[conditional "$1" was never defined.
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fi])])

# Copyright (C) 1999-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.


# There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be
# written in clear, in which case automake, when reading aclocal.m4,
# will think it sees a *use*, and therefore will trigger all it's
# C support machinery.  Also note that it means that autoscan, seeing
# CC etc. in the Makefile, will ask for an AC_PROG_CC use...


# _AM_DEPENDENCIES(NAME)
# ----------------------
# See how the compiler implements dependency checking.
# NAME is "CC", "CXX", "OBJC", "OBJCXX", "UPC", or "GJC".
# We try a few techniques and use that to set a single cache variable.
#
# We don't AC_REQUIRE the corresponding AC_PROG_CC since the latter was
# modified to invoke _AM_DEPENDENCIES(CC); we would have a circular
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AC_DEFUN([_AM_DEPENDENCIES],
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AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl
AC_REQUIRE([AM_MAKE_INCLUDE])dnl
AC_REQUIRE([AM_DEP_TRACK])dnl

m4_if([$1], [CC],   [depcc="$CC"   am_compiler_list=],
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AC_CACHE_CHECK([dependency style of $depcc],
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    if depmode=$depmode \
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      fi
    fi
  done

  cd ..
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else
  am_cv_$1_dependencies_compiler_type=none
fi
])
AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
AM_CONDITIONAL([am__fastdep$1], [
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])


# AM_SET_DEPDIR
# -------------
# Choose a directory name for dependency files.
# This macro is AC_REQUIREd in _AM_DEPENDENCIES.
AC_DEFUN([AM_SET_DEPDIR],
[AC_REQUIRE([AM_SET_LEADING_DOT])dnl
AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
])


# AM_DEP_TRACK
# ------------
AC_DEFUN([AM_DEP_TRACK],
[AC_ARG_ENABLE([dependency-tracking], [dnl
AS_HELP_STRING(
  [--enable-dependency-tracking],
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AS_HELP_STRING(
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if test "x$enable_dependency_tracking" != xno; then
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fi
AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
AC_SUBST([AMDEPBACKSLASH])dnl
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AC_SUBST([am__nodep])dnl
_AM_SUBST_NOTMAKE([am__nodep])dnl
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# Generate code to set up dependency tracking.              -*- Autoconf -*-

# Copyright (C) 1999-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_OUTPUT_DEPENDENCY_COMMANDS
# ------------------------------
AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
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# AM_OUTPUT_DEPENDENCY_COMMANDS
# -----------------------------
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# Do all the work for Automake.                             -*- Autoconf -*-

# Copyright (C) 1996-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# This macro actually does too much.  Some checks are only needed if
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dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
m4_define([AC_PROG_CC],
m4_defn([AC_PROG_CC])
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# AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
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# -----------------------------------------------
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_AM_IF_OPTION([no-define],,
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AC_REQUIRE([AC_ARG_PROGRAM])dnl
AM_MISSING_PROG([ACLOCAL], [aclocal-${am__api_version}])
AM_MISSING_PROG([AUTOCONF], [autoconf])
AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}])
AM_MISSING_PROG([AUTOHEADER], [autoheader])
AM_MISSING_PROG([MAKEINFO], [makeinfo])
AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
AC_REQUIRE([AC_PROG_MKDIR_P])dnl
# For better backward compatibility.  To be removed once Automake 1.9.x
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# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
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AC_REQUIRE([AC_PROG_MAKE_SET])dnl
AC_REQUIRE([AM_SET_LEADING_DOT])dnl
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AC_PROVIDE_IFELSE([AC_PROG_OBJC],
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AC_SUBST([CSCOPE])

AC_REQUIRE([_AM_SILENT_RULES])dnl
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AC_CONFIG_COMMANDS_PRE(dnl
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AC_REQUIRE([_AM_PROG_RM_F])
AC_REQUIRE([_AM_PROG_XARGS_N])

dnl The trailing newline in this macro's definition is deliberate, for
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dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
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m4_define([_AC_COMPILER_EXEEXT],
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# When config.status generates a header, we must update the stamp-h file.
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# Copyright (C) 2001-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_PROG_INSTALL_SH
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# Copyright (C) 2003-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# Check whether the underlying file-system supports filenames
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AC_SUBST([am__leading_dot])])

# Check to see how 'make' treats includes.	            -*- Autoconf -*-

# Copyright (C) 2001-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_MAKE_INCLUDE()
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cat > confinc.mk << 'END'
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am__include="#"
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rm -f confinc.* confmf.*
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AC_SUBST([am__include])])
AC_SUBST([am__quote])])

# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-

# Copyright (C) 1997-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_MISSING_PROG(NAME, PROGRAM)
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AC_DEFUN([AM_MISSING_PROG],
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# Helper functions for option handling.                     -*- Autoconf -*-

# Copyright (C) 2001-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
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# _AM_MANGLE_OPTION(NAME)
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AC_DEFUN([_AM_MANGLE_OPTION],
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# _AM_SET_OPTION(NAME)
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# _AM_SET_OPTIONS(OPTIONS)
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AC_DEFUN([_AM_SET_OPTIONS],
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AC_DEFUN([_AM_IF_OPTION],
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# Copyright (C) 1999-2024 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# _AM_PROG_CC_C_O
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# Copyright (C) 2022-2024 Free Software Foundation, Inc.
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# Copyright (C) 2001-2024 Free Software Foundation, Inc.
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# Check to make sure that the build environment is sane.    -*- Autoconf -*-

# Copyright (C) 1996-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
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# _AM_SLEEP_FRACTIONAL_SECONDS
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# _AM_FILESYSTEM_TIMESTAMP_RESOLUTION
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      # We test $MAKE if it is defined in the environment, else "make".
      # It might get overridden later, but our hope is that in practice
      # it does not matter: it is the system "make" which is (by far)
      # the most likely to be broken, whereas if the user overrides it,
      # probably they did so with a better, or at least not worse, make.
      # https://lists.gnu.org/archive/html/automake/2024-06/msg00051.html
      #
      # Create a Makefile (real tab character here):
      rm -f conftest.mk
      echo 'conftest.ts1: conftest.ts2' >conftest.mk
      echo '	touch conftest.ts2' >>conftest.mk
      #
      # Now, running
      #   touch conftest.ts1; touch conftest.ts2; make
      # should touch ts1 because ts2 is newer. This could happen by luck,
      # but most often, it will fail if make's support is insufficient. So
      # test for several consecutive successes.
      #
      # (We reuse conftest.ts[12] because we still want to modify existing
      # files, not create new ones, per above.)
      n=0
      make=${MAKE-make}
      until test $n -eq 3; do
        echo one > conftest.ts1
        sleep $am_try_res
        echo two > conftest.ts2 # ts2 should now be newer than ts1
        if $make -f conftest.mk | grep 'up to date' >/dev/null; then
          make_ok=false
          break # out of $n loop
        fi
        n=`expr $n + 1`
      done
    fi
    #
    if $make_ok; then
      # Everything we know to check worked out, so call this resolution good.
      am_cv_filesystem_timestamp_resolution=$am_try_res
      break # out of $am_try_res loop
    fi
    # Otherwise, we'll go on to check the next resolution.
  fi
done
rm -f conftest.ts?
# (end _am_filesystem_timestamp_resolution)
])])

# AM_SANITY_CHECK
# ---------------
AC_DEFUN([AM_SANITY_CHECK],
[AC_REQUIRE([_AM_FILESYSTEM_TIMESTAMP_RESOLUTION])
# This check should not be cached, as it may vary across builds of
# different projects.
AC_MSG_CHECKING([whether build environment is sane])
# Reject unsafe characters in $srcdir or the absolute working directory
# name.  Accept space and tab only in the latter.
am_lf='
'
case `pwd` in
  *[[\\\"\#\$\&\'\`$am_lf]]*)
    AC_MSG_ERROR([unsafe absolute working directory name]);;
esac
case $srcdir in
  *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
    AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
esac

# Do 'set' in a subshell so we don't clobber the current shell's
# arguments.  Must try -L first in case configure is actually a
# symlink; some systems play weird games with the mod time of symlinks
# (eg FreeBSD returns the mod time of the symlink's containing
# directory).
am_build_env_is_sane=no
am_has_slept=no
rm -f conftest.file
for am_try in 1 2; do
  echo "timestamp, slept: $am_has_slept" > conftest.file
  if (
    set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
    if test "$[]*" = "X"; then
      # -L didn't work.
      set X `ls -t "$srcdir/configure" conftest.file`
    fi
    test "$[]2" = conftest.file
  ); then
    am_build_env_is_sane=yes
    break
  fi
  # Just in case.
  sleep "$am_cv_filesystem_timestamp_resolution"
  am_has_slept=yes
done

AC_MSG_RESULT([$am_build_env_is_sane])
if test "$am_build_env_is_sane" = no; then
  AC_MSG_ERROR([newly created file is older than distributed files!
Check your system clock])
fi

# If we didn't sleep, we still need to ensure time stamps of config.status and
# generated files are strictly newer.
am_sleep_pid=
AS_IF([test -e conftest.file || grep 'slept: no' conftest.file >/dev/null 2>&1],, [dnl
  ( sleep "$am_cv_filesystem_timestamp_resolution" ) &
  am_sleep_pid=$!
])
AC_CONFIG_COMMANDS_PRE(
  [AC_MSG_CHECKING([that generated files are newer than configure])
   if test -n "$am_sleep_pid"; then
     # Hide warnings about reused PIDs.
     wait $am_sleep_pid 2>/dev/null
   fi
   AC_MSG_RESULT([done])])
rm -f conftest.file
])

# Copyright (C) 2009-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_SILENT_RULES
# ----------------
# Enable less verbose build rules support.
AC_DEFUN([_AM_SILENT_RULES],
[AM_DEFAULT_VERBOSITY=1
AC_ARG_ENABLE([silent-rules], [dnl
AS_HELP_STRING(
  [--enable-silent-rules],
  [less verbose build output (undo: "make V=1")])
AS_HELP_STRING(
  [--disable-silent-rules],
  [verbose build output (undo: "make V=0")])dnl
])
dnl
dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
dnl do not support nested variable expansions.
dnl See automake bug#9928 and bug#10237.
am_make=${MAKE-make}
AC_CACHE_CHECK([whether $am_make supports nested variables],
   [am_cv_make_support_nested_variables],
   [if AS_ECHO([['TRUE=$(BAR$(V))
BAR0=false
BAR1=true
V=1
am__doit:
	@$(TRUE)
.PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
  am_cv_make_support_nested_variables=yes
else
  am_cv_make_support_nested_variables=no
fi])
AC_SUBST([AM_V])dnl
AM_SUBST_NOTMAKE([AM_V])dnl
AC_SUBST([AM_DEFAULT_V])dnl
AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
AM_BACKSLASH='\'
AC_SUBST([AM_BACKSLASH])dnl
_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
dnl Delay evaluation of AM_DEFAULT_VERBOSITY to the end to allow multiple calls
dnl to AM_SILENT_RULES to change the default value.
AC_CONFIG_COMMANDS_PRE([dnl
case $enable_silent_rules in @%:@ (((
  yes) AM_DEFAULT_VERBOSITY=0;;
   no) AM_DEFAULT_VERBOSITY=1;;
esac
if test $am_cv_make_support_nested_variables = yes; then
  dnl Using '$V' instead of '$(V)' breaks IRIX make.
  AM_V='$(V)'
  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
else
  AM_V=$AM_DEFAULT_VERBOSITY
  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
fi
])dnl
])

# AM_SILENT_RULES([DEFAULT])
# --------------------------
# Set the default verbosity level to DEFAULT ("yes" being less verbose, "no" or
# empty being verbose).
AC_DEFUN([AM_SILENT_RULES],
[AC_REQUIRE([_AM_SILENT_RULES])
AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1])])

# Copyright (C) 2001-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_PROG_INSTALL_STRIP
# ---------------------
# One issue with vendor 'install' (even GNU) is that you can't
# specify the program used to strip binaries.  This is especially
# annoying in cross-compiling environments, where the build's strip
# is unlikely to handle the host's binaries.
# Fortunately install-sh will honor a STRIPPROG variable, so we
# always use install-sh in "make install-strip", and initialize
# STRIPPROG with the value of the STRIP variable (set by the user).
AC_DEFUN([AM_PROG_INSTALL_STRIP],
[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
# Installed binaries are usually stripped using 'strip' when the user
# run "make install-strip".  However 'strip' might not be the right
# tool to use in cross-compilation environments, therefore Automake
# will honor the 'STRIP' environment variable to overrule this program.
dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
if test "$cross_compiling" != no; then
  AC_CHECK_TOOL([STRIP], [strip], :)
fi
INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
AC_SUBST([INSTALL_STRIP_PROGRAM])])

# Copyright (C) 2006-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_SUBST_NOTMAKE(VARIABLE)
# ---------------------------
# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
# This macro is traced by Automake.
AC_DEFUN([_AM_SUBST_NOTMAKE])

# AM_SUBST_NOTMAKE(VARIABLE)
# --------------------------
# Public sister of _AM_SUBST_NOTMAKE.
AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])

# Check how to create a tarball.                            -*- Autoconf -*-

# Copyright (C) 2004-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_PROG_TAR(FORMAT)
# --------------------
# Check how to create a tarball in format FORMAT.
# FORMAT should be one of 'v7', 'ustar', or 'pax'.
#
# Substitute a variable $(am__tar) that is a command
# writing to stdout a FORMAT-tarball containing the directory
# $tardir.
#     tardir=directory && $(am__tar) > result.tar
#
# Substitute a variable $(am__untar) that extract such
# a tarball read from stdin.
#     $(am__untar) < result.tar
#
AC_DEFUN([_AM_PROG_TAR],
[# Always define AMTAR for backward compatibility.  Yes, it's still used
# in the wild :-(  We should find a proper way to deprecate it ...
AC_SUBST([AMTAR], ['$${TAR-tar}'])

# We'll loop over all known methods to create a tar archive until one works.
_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'

m4_if([$1], [v7],
  [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],

  [m4_case([$1],
    [ustar],
     [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
      # There is notably a 21 bits limit for the UID and the GID.  In fact,
      # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
      # and bug#13588).
      am_max_uid=2097151 # 2^21 - 1
      am_max_gid=$am_max_uid
      # The $UID and $GID variables are not portable, so we need to resort
      # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
      # below are definitely unexpected, so allow the users to see them
      # (that is, avoid stderr redirection).
      am_uid=`id -u || echo unknown`
      am_gid=`id -g || echo unknown`
      AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
      if test x$am_uid = xunknown; then
        AC_MSG_WARN([ancient id detected; assuming current UID is ok, but dist-ustar might not work])
      elif test $am_uid -le $am_max_uid; then
        AC_MSG_RESULT([yes])
      else
        AC_MSG_RESULT([no])
        _am_tools=none
      fi
      AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
      if test x$gm_gid = xunknown; then
        AC_MSG_WARN([ancient id detected; assuming current GID is ok, but dist-ustar might not work])
      elif test $am_gid -le $am_max_gid; then
        AC_MSG_RESULT([yes])
      else
        AC_MSG_RESULT([no])
        _am_tools=none
      fi],

  [pax],
    [],

  [m4_fatal([Unknown tar format])])

  AC_MSG_CHECKING([how to create a $1 tar archive])

  # Go ahead even if we have the value already cached.  We do so because we
  # need to set the values for the 'am__tar' and 'am__untar' variables.
  _am_tools=${am_cv_prog_tar_$1-$_am_tools}

  for _am_tool in $_am_tools; do
    case $_am_tool in
    gnutar)
      for _am_tar in tar gnutar gtar; do
        AM_RUN_LOG([$_am_tar --version]) && break
      done
      am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
      am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
      am__untar="$_am_tar -xf -"
      ;;
    plaintar)
      # Must skip GNU tar: if it does not support --format= it doesn't create
      # ustar tarball either.
      (tar --version) >/dev/null 2>&1 && continue
      am__tar='tar chf - "$$tardir"'
      am__tar_='tar chf - "$tardir"'
      am__untar='tar xf -'
      ;;
    pax)
      am__tar='pax -L -x $1 -w "$$tardir"'
      am__tar_='pax -L -x $1 -w "$tardir"'
      am__untar='pax -r'
      ;;
    cpio)
      am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
      am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
      am__untar='cpio -i -H $1 -d'
      ;;
    none)
      am__tar=false
      am__tar_=false
      am__untar=false
      ;;
    esac

    # If the value was cached, stop now.  We just wanted to have am__tar
    # and am__untar set.
    test -n "${am_cv_prog_tar_$1}" && break

    # tar/untar a dummy directory, and stop if the command works.
    rm -rf conftest.dir
    mkdir conftest.dir
    echo GrepMe > conftest.dir/file
    AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
    rm -rf conftest.dir
    if test -s conftest.tar; then
      AM_RUN_LOG([$am__untar <conftest.tar])
      AM_RUN_LOG([cat conftest.dir/file])
      grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
    fi
  done
  rm -rf conftest.dir

  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
  AC_MSG_RESULT([$am_cv_prog_tar_$1])])

AC_SUBST([am__tar])
AC_SUBST([am__untar])
]) # _AM_PROG_TAR

# Copyright (C) 2022-2024 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_PROG_XARGS_N
# ----------------
# Check whether 'xargs -n' works.  It should work everywhere, so the fallback
# is not optimized at all as we never expect to use it.
AC_DEFUN([_AM_PROG_XARGS_N],
[AC_CACHE_CHECK([xargs -n works], am_cv_xargs_n_works, [dnl
AS_IF([test "`echo 1 2 3 | xargs -n2 echo`" = "1 2
3"], [am_cv_xargs_n_works=yes], [am_cv_xargs_n_works=no])])
AS_IF([test "$am_cv_xargs_n_works" = yes], [am__xargs_n='xargs -n'], [dnl
  am__xargs_n='am__xargs_n () { shift; sed "s/ /\\n/g" | while read am__xargs_n_arg; do "$@" "$am__xargs_n_arg"; done; }'
])dnl
AC_SUBST(am__xargs_n)
])

m4_include([scripts/m4/gettext.m4])
m4_include([scripts/m4/iconv.m4])
m4_include([scripts/m4/lib-ld.m4])
m4_include([scripts/m4/lib-link.m4])
m4_include([scripts/m4/lib-prefix.m4])
m4_include([scripts/m4/libtool.m4])
m4_include([scripts/m4/ltoptions.m4])
m4_include([scripts/m4/ltsugar.m4])
m4_include([scripts/m4/ltversion.m4])
m4_include([scripts/m4/lt~obsolete.m4])
m4_include([scripts/m4/nls.m4])
m4_include([scripts/m4/po.m4])
m4_include([scripts/m4/progtest.m4])
