1# =========================================================================== 2# https://www.gnu.org/software/autoconf-archive/ax_prog_cc_for_build.html 3# =========================================================================== 4# 5# SYNOPSIS 6# 7# AX_PROG_CC_FOR_BUILD 8# 9# DESCRIPTION 10# 11# This macro searches for a C compiler that generates native executables, 12# that is a C compiler that surely is not a cross-compiler. This can be 13# useful if you have to generate source code at compile-time like for 14# example GCC does. 15# 16# The macro sets the CC_FOR_BUILD and CPP_FOR_BUILD macros to anything 17# needed to compile or link (CC_FOR_BUILD) and preprocess (CPP_FOR_BUILD). 18# The value of these variables can be overridden by the user by specifying 19# a compiler with an environment variable (like you do for standard CC). 20# 21# It also sets BUILD_EXEEXT and BUILD_OBJEXT to the executable and object 22# file extensions for the build platform, and GCC_FOR_BUILD to `yes' if 23# the compiler we found is GCC. All these variables but GCC_FOR_BUILD are 24# substituted in the Makefile. 25# 26# LICENSE 27# 28# Copyright (c) 2008 Paolo Bonzini <bonzini@gnu.org> 29# 30# Copying and distribution of this file, with or without modification, are 31# permitted in any medium without royalty provided the copyright notice 32# and this notice are preserved. This file is offered as-is, without any 33# warranty. 34 35#serial 18 36 37AU_ALIAS([AC_PROG_CC_FOR_BUILD], [AX_PROG_CC_FOR_BUILD]) 38AC_DEFUN([AX_PROG_CC_FOR_BUILD], [dnl 39AC_REQUIRE([AC_PROG_CC])dnl 40AC_REQUIRE([AC_PROG_CPP])dnl 41AC_REQUIRE([AC_CANONICAL_BUILD])dnl 42 43dnl Use the standard macros, but make them use other variable names 44dnl 45pushdef([ac_cv_prog_CPP], ac_cv_build_prog_CPP)dnl 46pushdef([ac_cv_prog_cc_c89], ac_cv_build_prog_cc_c89)dnl 47pushdef([ac_cv_prog_gcc], ac_cv_build_prog_gcc)dnl 48pushdef([ac_cv_prog_cc_works], ac_cv_build_prog_cc_works)dnl 49pushdef([ac_cv_prog_cc_cross], ac_cv_build_prog_cc_cross)dnl 50pushdef([ac_cv_prog_cc_g], ac_cv_build_prog_cc_g)dnl 51pushdef([ac_cv_c_compiler_gnu], ac_cv_build_c_compiler_gnu)dnl 52pushdef([ac_cv_exeext], ac_cv_build_exeext)dnl 53pushdef([ac_cv_objext], ac_cv_build_objext)dnl 54pushdef([ac_exeext], ac_build_exeext)dnl 55pushdef([ac_objext], ac_build_objext)dnl 56pushdef([CC], CC_FOR_BUILD)dnl 57pushdef([CCDEPMODE], CCDEPMODE_FOR_BUILD)dnl 58pushdef([CPP], CPP_FOR_BUILD)dnl 59pushdef([GCC], GCC_FOR_BUILD)dnl 60pushdef([CFLAGS], CFLAGS_FOR_BUILD)dnl 61pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl 62pushdef([EXEEXT], BUILD_EXEEXT)dnl 63pushdef([LDFLAGS], LDFLAGS_FOR_BUILD)dnl 64pushdef([OBJEXT], BUILD_OBJEXT)dnl 65pushdef([host], build)dnl 66pushdef([host_alias], build_alias)dnl 67pushdef([host_cpu], build_cpu)dnl 68pushdef([host_vendor], build_vendor)dnl 69pushdef([host_os], build_os)dnl 70pushdef([ac_cv_host], ac_cv_build)dnl 71pushdef([ac_cv_host_alias], ac_cv_build_alias)dnl 72pushdef([ac_cv_host_cpu], ac_cv_build_cpu)dnl 73pushdef([ac_cv_host_vendor], ac_cv_build_vendor)dnl 74pushdef([ac_cv_host_os], ac_cv_build_os)dnl 75pushdef([ac_tool_prefix], ac_build_tool_prefix)dnl 76pushdef([am_cv_CC_dependencies_compiler_type], am_cv_build_CC_dependencies_compiler_type)dnl 77pushdef([am__fastdepCC_FALSE], am__fastdepCC_build_FALSE)dnl 78pushdef([am__fastdepCC_TRUE], am__fastdepCC_build_TRUE)dnl 79pushdef([am_cv_prog_cc_c_o], am_cv_build_prog_cc_c_o)dnl 80pushdef([cross_compiling], cross_compiling_build)dnl 81 82cross_compiling_build=no 83 84ac_build_tool_prefix= 85AS_IF([test -n "$build"], [ac_build_tool_prefix="$build-"], 86 [test -n "$build_alias"],[ac_build_tool_prefix="$build_alias-"]) 87 88AC_LANG_PUSH([C]) 89AC_PROG_CC 90_AC_COMPILER_EXEEXT 91_AC_COMPILER_OBJEXT 92AC_PROG_CPP 93 94dnl Restore the old definitions 95dnl 96popdef([cross_compiling])dnl 97popdef([am_cv_prog_cc_c_o])dnl 98popdef([am__fastdepCC_TRUE])dnl 99popdef([am__fastdepCC_FALSE])dnl 100popdef([am_cv_CC_dependencies_compiler_type])dnl 101popdef([ac_tool_prefix])dnl 102popdef([ac_cv_host_os])dnl 103popdef([ac_cv_host_vendor])dnl 104popdef([ac_cv_host_cpu])dnl 105popdef([ac_cv_host_alias])dnl 106popdef([ac_cv_host])dnl 107popdef([host_os])dnl 108popdef([host_vendor])dnl 109popdef([host_cpu])dnl 110popdef([host_alias])dnl 111popdef([host])dnl 112popdef([OBJEXT])dnl 113popdef([LDFLAGS])dnl 114popdef([EXEEXT])dnl 115popdef([CPPFLAGS])dnl 116popdef([CFLAGS])dnl 117popdef([GCC])dnl 118popdef([CPP])dnl 119popdef([CCDEPMODE])dnl 120popdef([CC])dnl 121popdef([ac_objext])dnl 122popdef([ac_exeext])dnl 123popdef([ac_cv_objext])dnl 124popdef([ac_cv_exeext])dnl 125popdef([ac_cv_c_compiler_gnu])dnl 126popdef([ac_cv_prog_cc_g])dnl 127popdef([ac_cv_prog_cc_cross])dnl 128popdef([ac_cv_prog_cc_works])dnl 129popdef([ac_cv_prog_cc_c89])dnl 130popdef([ac_cv_prog_gcc])dnl 131popdef([ac_cv_prog_CPP])dnl 132 133dnl restore global variables ac_ext, ac_cpp, ac_compile, 134dnl ac_link, ac_compiler_gnu (dependant on the current 135dnl language after popping): 136AC_LANG_POP([C]) 137 138dnl Finally, set Makefile variables 139dnl 140AC_SUBST(BUILD_EXEEXT)dnl 141AC_SUBST(BUILD_OBJEXT)dnl 142AC_SUBST([CFLAGS_FOR_BUILD])dnl 143AC_SUBST([CPPFLAGS_FOR_BUILD])dnl 144AC_SUBST([LDFLAGS_FOR_BUILD])dnl 145]) 146