| 1 | # =========================================================================== |
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| 2 | # https://www.gnu.org/software/autoconf-archive/ax_prog_cxx_for_build.html |
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| 3 | # =========================================================================== |
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| 4 | # |
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| 5 | # SYNOPSIS |
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| 6 | # |
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| 7 | # AX_PROG_CXX_FOR_BUILD |
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| 8 | # |
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| 9 | # DESCRIPTION |
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| 10 | # |
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| 11 | # This macro searches for a C++ compiler that generates native |
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| 12 | # executables, that is a C++ compiler that surely is not a cross-compiler. |
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| 13 | # This can be useful if you have to generate source code at compile-time |
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| 14 | # like for example GCC does. |
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| 15 | # |
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| 16 | # The macro sets the CXX_FOR_BUILD and CXXCPP_FOR_BUILD macros to anything |
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| 17 | # needed to compile or link (CXX_FOR_BUILD) and preprocess |
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| 18 | # (CXXCPP_FOR_BUILD). The value of these variables can be overridden by |
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| 19 | # the user by specifying a compiler with an environment variable (like you |
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| 20 | # do for standard CXX). |
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| 21 | # |
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| 22 | # LICENSE |
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| 23 | # |
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| 24 | # Copyright (c) 2008 Paolo Bonzini <bonzini@gnu.org> |
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| 25 | # Copyright (c) 2012 Avionic Design GmbH |
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| 26 | # |
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| 27 | # Based on the AX_PROG_CC_FOR_BUILD macro by Paolo Bonzini. |
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| 28 | # |
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| 29 | # Copying and distribution of this file, with or without modification, are |
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| 30 | # permitted in any medium without royalty provided the copyright notice |
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| 31 | # and this notice are preserved. This file is offered as-is, without any |
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| 32 | # warranty. |
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| 33 | |
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| 34 | #serial 4 |
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| 35 | |
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| 36 | AU_ALIAS([AC_PROG_CXX_FOR_BUILD], [AX_PROG_CXX_FOR_BUILD]) |
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| 37 | AC_DEFUN([AX_PROG_CXX_FOR_BUILD], [dnl |
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| 38 | AC_REQUIRE([AX_PROG_CC_FOR_BUILD])dnl |
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| 39 | AC_REQUIRE([AC_PROG_CXX])dnl |
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| 40 | AC_REQUIRE([AC_PROG_CXXCPP])dnl |
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| 41 | AC_REQUIRE([AC_CANONICAL_HOST])dnl |
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| 42 | |
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| 43 | dnl Use the standard macros, but make them use other variable names |
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| 44 | dnl |
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| 45 | pushdef([ac_cv_prog_CXXCPP], ac_cv_build_prog_CXXCPP)dnl |
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| 46 | pushdef([ac_cv_prog_gxx], ac_cv_build_prog_gxx)dnl |
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| 47 | pushdef([ac_cv_prog_cxx_works], ac_cv_build_prog_cxx_works)dnl |
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| 48 | pushdef([ac_cv_prog_cxx_cross], ac_cv_build_prog_cxx_cross)dnl |
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| 49 | pushdef([ac_cv_prog_cxx_g], ac_cv_build_prog_cxx_g)dnl |
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| 50 | pushdef([CXX], CXX_FOR_BUILD)dnl |
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| 51 | pushdef([CXXCPP], CXXCPP_FOR_BUILD)dnl |
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| 52 | pushdef([GXX], GXX_FOR_BUILD)dnl |
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| 53 | pushdef([CXXFLAGS], CXXFLAGS_FOR_BUILD)dnl |
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| 54 | pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl |
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| 55 | pushdef([CXXCPPFLAGS], CXXCPPFLAGS_FOR_BUILD)dnl |
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| 56 | pushdef([host], build)dnl |
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| 57 | pushdef([host_alias], build_alias)dnl |
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| 58 | pushdef([host_cpu], build_cpu)dnl |
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| 59 | pushdef([host_vendor], build_vendor)dnl |
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| 60 | pushdef([host_os], build_os)dnl |
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| 61 | pushdef([ac_cv_host], ac_cv_build)dnl |
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| 62 | pushdef([ac_cv_host_alias], ac_cv_build_alias)dnl |
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| 63 | pushdef([ac_cv_host_cpu], ac_cv_build_cpu)dnl |
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| 64 | pushdef([ac_cv_host_vendor], ac_cv_build_vendor)dnl |
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| 65 | pushdef([ac_cv_host_os], ac_cv_build_os)dnl |
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| 66 | pushdef([ac_tool_prefix], ac_build_tool_prefix)dnl |
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| 67 | pushdef([am_cv_CXX_dependencies_compiler_type], am_cv_build_CXX_dependencies_compiler_type)dnl |
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| 68 | pushdef([cross_compiling], cross_compiling_build)dnl |
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| 69 | |
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| 70 | cross_compiling_build=no |
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| 71 | |
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| 72 | ac_build_tool_prefix= |
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| 73 | AS_IF([test -n "$build"], [ac_build_tool_prefix="$build-"], |
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| 74 | [test -n "$build_alias"],[ac_build_tool_prefix="$build_alias-"]) |
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| 75 | |
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| 76 | AC_LANG_PUSH([C++]) |
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| 77 | AC_PROG_CXX |
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| 78 | AC_PROG_CXXCPP |
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| 79 | |
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| 80 | dnl Restore the old definitions |
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| 81 | dnl |
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| 82 | popdef([cross_compiling])dnl |
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| 83 | popdef([am_cv_CXX_dependencies_compiler_type])dnl |
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| 84 | popdef([ac_tool_prefix])dnl |
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| 85 | popdef([ac_cv_host_os])dnl |
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| 86 | popdef([ac_cv_host_vendor])dnl |
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| 87 | popdef([ac_cv_host_cpu])dnl |
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| 88 | popdef([ac_cv_host_alias])dnl |
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| 89 | popdef([ac_cv_host])dnl |
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| 90 | popdef([host_os])dnl |
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| 91 | popdef([host_vendor])dnl |
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| 92 | popdef([host_cpu])dnl |
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| 93 | popdef([host_alias])dnl |
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| 94 | popdef([host])dnl |
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| 95 | popdef([CXXCPPFLAGS])dnl |
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| 96 | popdef([CPPFLAGS])dnl |
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| 97 | popdef([CXXFLAGS])dnl |
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| 98 | popdef([CXXCPP])dnl |
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| 99 | popdef([CXX])dnl |
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| 100 | popdef([ac_cv_prog_cxx_g])dnl |
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| 101 | popdef([ac_cv_prog_cxx_cross])dnl |
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| 102 | popdef([ac_cv_prog_cxx_works])dnl |
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| 103 | popdef([ac_cv_prog_gxx])dnl |
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| 104 | popdef([ac_cv_prog_CXXCPP])dnl |
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| 105 | |
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| 106 | dnl restore global variables (dependant on the current |
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| 107 | dnl language after popping): |
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| 108 | AC_LANG_POP([C++]) |
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| 109 | |
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| 110 | dnl Finally, set Makefile variables |
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| 111 | dnl |
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| 112 | AC_SUBST([CXXFLAGS_FOR_BUILD])dnl |
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| 113 | AC_SUBST([CXXCPPFLAGS_FOR_BUILD])dnl |
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| 114 | ]) |
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