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https://gitlab.com/mbunkus/mkvtoolnix.git
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Test for support for required C++11 features
This commit is contained in:
Moritz Bunkus
parent
34fe08e459
commit
b0e96e3b5d
204
ac/c++11.m4
Normal file
204
ac/c++11.m4
Normal file
@ -0,0 +1,204 @@
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AC_DEFUN([AX_CXX_STD_CXX0X_FLAG],[
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AC_CACHE_CHECK([for support for the "-std=c++0x" flag], [ax_cv_std_cxx0x_flag],[
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CXXFLAGS_SAVED=$CXXFLAGS
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CXXFLAGS="$CXXFLAGS -std=c++0x"
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export CXXFLAGS
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AC_LANG_PUSH(C++)
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AC_TRY_COMPILE(
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[],
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[true;],
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[ax_cv_std_cxx0x_flag="yes"],
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[ax_cv_std_cxx0x_flag="no"])
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AC_LANG_POP
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CXXFLAGS="$CXXFLAGS_SAVED"
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])
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STD_CXX0X=""
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if test x"$ax_cv_std_cxx0x_flag" = xyes ; then
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STD_CXX0X=-std=c++0x
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fi
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AC_SUBST(STD_CXX0X)
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])
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AC_DEFUN([AX_CXX11_INITIALIZER_LISTS],[
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AC_CACHE_CHECK([for support for C++11 feature "initializer lists"], [ax_cv_cxx11_initializer_lists],[
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CXXFLAGS_SAVED=$CXXFLAGS
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CXXFLAGS="$CXXFLAGS $STD_CXX0X"
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export CXXFLAGS
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AC_LANG_PUSH(C++)
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AC_TRY_COMPILE(
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[
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#include <string>
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#include <vector>
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],
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[std::vector<std::string> listy = { "asd", "qwe", "123" };],
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[ax_cv_cxx11_initializer_lists="yes"],
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[ax_cv_cxx11_initializer_lists="no"])
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AC_LANG_POP
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CXXFLAGS="$CXXFLAGS_SAVED"
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])
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if ! test x"$ax_cv_cxx11_initializer_lists" = xyes ; then
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missing_cxx11_features="$missing_cxx11_features\n * initializer lists"
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fi
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])
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AC_DEFUN([AX_CXX11_RANGE_BASED_FOR],[
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AC_CACHE_CHECK([for support for C++11 feature "range-based 'for'"], [ax_cv_cxx11_range_based_for],[
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CXXFLAGS_SAVED=$CXXFLAGS
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CXXFLAGS="$CXXFLAGS $STD_CXX0X"
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export CXXFLAGS
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AC_LANG_PUSH(C++)
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AC_TRY_COMPILE(
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[
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#include <string>
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#include <vector>
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],[
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std::string total;
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std::vector<std::string> listy = { "asd", "qwe", "123" };
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for (std::string &s : listy)
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total += s;
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],
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[ax_cv_cxx11_range_based_for="yes"],
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[ax_cv_cxx11_range_based_for="no"])
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AC_LANG_POP
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CXXFLAGS="$CXXFLAGS_SAVED"
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])
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if ! test x"$ax_cv_cxx11_range_based_for" = xyes ; then
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missing_cxx11_features="$missing_cxx11_features\n * range-based 'for'"
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fi
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])
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AC_DEFUN([AX_CXX11_RIGHT_ANGLE_BRACKETS],[
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AC_CACHE_CHECK([for support for C++11 feature "right angle brackets"], [ax_cv_cxx11_right_angle_brackets],[
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CXXFLAGS_SAVED=$CXXFLAGS
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CXXFLAGS="$CXXFLAGS $STD_CXX0X"
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export CXXFLAGS
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AC_LANG_PUSH(C++)
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AC_TRY_COMPILE(
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[
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#include <map>
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#include <vector>
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typedef std::map<int, std::vector<int>> unicorn;
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],
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[unicorn charlie;],
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[ax_cv_cxx11_right_angle_brackets="yes"],
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[ax_cv_cxx11_right_angle_brackets="no"])
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AC_LANG_POP
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CXXFLAGS="$CXXFLAGS_SAVED"
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])
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if ! test x"$ax_cv_cxx11_right_angle_brackets" = xyes ; then
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missing_cxx11_features="$missing_cxx11_features\n * right angle brackets"
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fi
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])
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AC_DEFUN([AX_CXX11_AUTO_KEYWORD],[
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AC_CACHE_CHECK([for support for C++11 feature "'auto' keyword"], [ax_cv_cxx11_auto_keyword],[
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CXXFLAGS_SAVED=$CXXFLAGS
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CXXFLAGS="$CXXFLAGS $STD_CXX0X"
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export CXXFLAGS
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AC_LANG_PUSH(C++)
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AC_TRY_COMPILE(
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[
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#include <vector>
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],[
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std::vector<unsigned int> listy;
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unsigned int sum = 0;
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for (auto i = listy.begin(); i < listy.end(); i++)
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sum += *i;
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],
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[ax_cv_cxx11_auto_keyword="yes"],
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[ax_cv_cxx11_auto_keyword="no"])
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AC_LANG_POP
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CXXFLAGS="$CXXFLAGS_SAVED"
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])
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if ! test x"$ax_cv_cxx11_auto_keyword" = xyes ; then
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missing_cxx11_features="$missing_cxx11_features\n * 'auto' keyword"
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fi
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])
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AC_DEFUN([AX_CXX11_LAMBDA_FUNCTIONS],[
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AC_CACHE_CHECK([for support for C++11 feature "lambda functions"], [ax_cv_cxx11_lambda_functions],[
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CXXFLAGS_SAVED=$CXXFLAGS
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CXXFLAGS="$CXXFLAGS $STD_CXX0X"
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export CXXFLAGS
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AC_LANG_PUSH(C++)
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AC_TRY_COMPILE(
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[
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#include <algorithm>
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#include <vector>
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],
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[
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std::vector<unsigned int> listy;
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unsigned int sum = 0;
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std::for_each(listy.begin(), listy.end(), [&](unsigned int i) { sum += i; });
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],
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[ax_cv_cxx11_lambda_functions="yes"],
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[ax_cv_cxx11_lambda_functions="no"])
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AC_LANG_POP
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CXXFLAGS="$CXXFLAGS_SAVED"
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])
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if ! test x"$ax_cv_cxx11_lambda_functions" = xyes ; then
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missing_cxx11_features="$missing_cxx11_features\n * lambda functions"
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fi
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])
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dnl AC_DEFUN([AX_CXX11_DEF_NAME],[
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dnl AC_CACHE_CHECK([for support for C++11 feature "human"], [ax_cv_cxx11_def_name],[
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dnl
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dnl CXXFLAGS_SAVED=$CXXFLAGS
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dnl CXXFLAGS="$CXXFLAGS $STD_CXX0X"
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dnl export CXXFLAGS
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dnl
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dnl AC_LANG_PUSH(C++)
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dnl AC_TRY_COMPILE(
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dnl [],
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dnl [],
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dnl [ax_cv_cxx11_def_name="yes"],
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dnl [ax_cv_cxx11_def_name="no"])
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dnl AC_LANG_POP
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dnl
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dnl CXXFLAGS="$CXXFLAGS_SAVED"
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dnl ])
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dnl
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dnl if ! test x"$ax_cv_cxx11_def_name" = xyes ; then
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dnl missing_cxx11_features="$missing_cxx11_features\n * human"
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dnl fi
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dnl ])
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AX_CXX_STD_CXX0X_FLAG
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AX_CXX11_INITIALIZER_LISTS
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AX_CXX11_RANGE_BASED_FOR
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AX_CXX11_RIGHT_ANGLE_BRACKETS
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AX_CXX11_AUTO_KEYWORD
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AX_CXX11_LAMBDA_FUNCTIONS
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if test x"$missing_cxx11_features" != x ; then
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printf "The following features of the C++11 standard are not supported by $CXX:$missing_cxx11_features\n"
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printf "If you are using the GNU C compiler collection (gcc) then you need\n"
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printf "at least v4.6.\n"
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AC_MSG_ERROR([support for required C++11 features incomplete])
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fi
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@ -16,6 +16,7 @@ m4_include(ac/pkg.m4)
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m4_include(ac/initialization.m4)
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m4_include(ac/check_version.m4)
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m4_include(ac/gcc_version.m4)
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m4_include(ac/c++11.m4)
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m4_include(ac/endianess.m4)
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m4_include(ac/mingw.m4)
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m4_include(ac/extra_inc_lib.m4)
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