1# SPDX-License-Identifier: FSFAP 2# 3# =========================================================================== 4# https://www.gnu.org/software/autoconf-archive/ax_prog_cc_for_build.html 5# =========================================================================== 6# 7# SYNOPSIS 8# 9# AX_PROG_CC_FOR_BUILD 10# 11# DESCRIPTION 12# 13# This macro searches for a C compiler that generates native executables, 14# that is a C compiler that surely is not a cross-compiler. This can be 15# useful if you have to generate source code at compile-time like for 16# example GCC does. 17# 18# The macro sets the CC_FOR_BUILD and CPP_FOR_BUILD macros to anything 19# needed to compile or link (CC_FOR_BUILD) and preprocess (CPP_FOR_BUILD). 20# The value of these variables can be overridden by the user by specifying 21# a compiler with an environment variable (like you do for standard CC). 22# 23# It also sets BUILD_EXEEXT and BUILD_OBJEXT to the executable and object 24# file extensions for the build platform, and GCC_FOR_BUILD to `yes' if 25# the compiler we found is GCC. All these variables but GCC_FOR_BUILD are 26# substituted in the Makefile. 27# 28# LICENSE 29# 30# Copyright (c) 2008 Paolo Bonzini <bonzini@gnu.org> 31# 32# Copying and distribution of this file, with or without modification, are 33# permitted in any medium without royalty provided the copyright notice 34# and this notice are preserved. This file is offered as-is, without any 35# warranty. 36 37#serial 20 38 39AU_ALIAS([AC_PROG_CC_FOR_BUILD], [AX_PROG_CC_FOR_BUILD]) 40AC_DEFUN([AX_PROG_CC_FOR_BUILD], [dnl 41AC_REQUIRE([AC_PROG_CC])dnl 42AC_REQUIRE([AC_PROG_CPP])dnl 43AC_REQUIRE([AC_CANONICAL_BUILD])dnl 44 45dnl Use the standard macros, but make them use other variable names 46dnl 47pushdef([ac_cv_prog_CPP], ac_cv_build_prog_CPP)dnl 48pushdef([ac_cv_prog_cc_c89], ac_cv_build_prog_cc_c89)dnl 49pushdef([ac_cv_prog_cc_c99], ac_cv_build_prog_cc_c99)dnl 50pushdef([ac_cv_prog_cc_c11], ac_cv_build_prog_cc_c11)dnl 51pushdef([ac_cv_prog_gcc], ac_cv_build_prog_gcc)dnl 52pushdef([ac_cv_prog_cc_works], ac_cv_build_prog_cc_works)dnl 53pushdef([ac_cv_prog_cc_cross], ac_cv_build_prog_cc_cross)dnl 54pushdef([ac_cv_prog_cc_g], ac_cv_build_prog_cc_g)dnl 55pushdef([ac_cv_c_compiler_gnu], ac_cv_build_c_compiler_gnu)dnl 56pushdef([ac_cv_exeext], ac_cv_build_exeext)dnl 57pushdef([ac_cv_objext], ac_cv_build_objext)dnl 58pushdef([ac_exeext], ac_build_exeext)dnl 59pushdef([ac_objext], ac_build_objext)dnl 60pushdef([CC], CC_FOR_BUILD)dnl 61pushdef([CPP], CPP_FOR_BUILD)dnl 62pushdef([GCC], GCC_FOR_BUILD)dnl 63pushdef([CFLAGS], CFLAGS_FOR_BUILD)dnl 64pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl 65pushdef([EXEEXT], BUILD_EXEEXT)dnl 66pushdef([LDFLAGS], LDFLAGS_FOR_BUILD)dnl 67pushdef([OBJEXT], BUILD_OBJEXT)dnl 68pushdef([host], build)dnl 69pushdef([host_alias], build_alias)dnl 70pushdef([host_cpu], build_cpu)dnl 71pushdef([host_vendor], build_vendor)dnl 72pushdef([host_os], build_os)dnl 73pushdef([ac_cv_host], ac_cv_build)dnl 74pushdef([ac_cv_host_alias], ac_cv_build_alias)dnl 75pushdef([ac_cv_host_cpu], ac_cv_build_cpu)dnl 76pushdef([ac_cv_host_vendor], ac_cv_build_vendor)dnl 77pushdef([ac_cv_host_os], ac_cv_build_os)dnl 78pushdef([ac_tool_prefix], ac_build_tool_prefix)dnl 79pushdef([am_cv_CC_dependencies_compiler_type], am_cv_build_CC_dependencies_compiler_type)dnl 80pushdef([am_cv_prog_cc_c_o], am_cv_build_prog_cc_c_o)dnl 81pushdef([cross_compiling], cross_compiling_build)dnl 82 83cross_compiling_build=no 84 85ac_build_tool_prefix= 86AS_IF([test -n "$build"], [ac_build_tool_prefix="$build-"], 87 [test -n "$build_alias"],[ac_build_tool_prefix="$build_alias-"]) 88 89AC_LANG_PUSH([C]) 90 91dnl The pushdef([ac_cv_c_compiler_gnu], ...) currently does not cover 92dnl the use of this variable in _AC_LANG_COMPILER_GNU called by 93dnl AC_PROG_CC. Unset this cache variable temporarily as a workaround. 94was_set_c_compiler_gnu=${[ac_cv_c_compiler_gnu]+y} 95AS_IF([test ${was_set_c_compiler_gnu}], 96 [saved_c_compiler_gnu=$[ac_cv_c_compiler_gnu] 97 AS_UNSET([[ac_cv_c_compiler_gnu]])]) 98 99AC_PROG_CC 100 101dnl Restore ac_cv_c_compiler_gnu 102AS_IF([test ${was_set_c_compiler_gnu}], 103 [[ac_cv_c_compiler_gnu]=$[saved_c_compiler_gnu]]) 104 105_AC_COMPILER_EXEEXT 106_AC_COMPILER_OBJEXT 107AC_PROG_CPP 108 109dnl Restore the old definitions 110dnl 111popdef([cross_compiling])dnl 112popdef([am_cv_prog_cc_c_o])dnl 113popdef([am_cv_CC_dependencies_compiler_type])dnl 114popdef([ac_tool_prefix])dnl 115popdef([ac_cv_host_os])dnl 116popdef([ac_cv_host_vendor])dnl 117popdef([ac_cv_host_cpu])dnl 118popdef([ac_cv_host_alias])dnl 119popdef([ac_cv_host])dnl 120popdef([host_os])dnl 121popdef([host_vendor])dnl 122popdef([host_cpu])dnl 123popdef([host_alias])dnl 124popdef([host])dnl 125popdef([OBJEXT])dnl 126popdef([LDFLAGS])dnl 127popdef([EXEEXT])dnl 128popdef([CPPFLAGS])dnl 129popdef([CFLAGS])dnl 130popdef([GCC])dnl 131popdef([CPP])dnl 132popdef([CC])dnl 133popdef([ac_objext])dnl 134popdef([ac_exeext])dnl 135popdef([ac_cv_objext])dnl 136popdef([ac_cv_exeext])dnl 137popdef([ac_cv_c_compiler_gnu])dnl 138popdef([ac_cv_prog_cc_g])dnl 139popdef([ac_cv_prog_cc_cross])dnl 140popdef([ac_cv_prog_cc_works])dnl 141popdef([ac_cv_prog_cc_c89])dnl 142popdef([ac_cv_prog_gcc])dnl 143popdef([ac_cv_prog_CPP])dnl 144 145dnl restore global variables ac_ext, ac_cpp, ac_compile, 146dnl ac_link, ac_compiler_gnu (dependant on the current 147dnl language after popping): 148AC_LANG_POP([C]) 149 150dnl Finally, set Makefile variables 151dnl 152AC_SUBST(BUILD_EXEEXT)dnl 153AC_SUBST(BUILD_OBJEXT)dnl 154AC_SUBST([CFLAGS_FOR_BUILD])dnl 155AC_SUBST([CPPFLAGS_FOR_BUILD])dnl 156AC_SUBST([LDFLAGS_FOR_BUILD])dnl 157]) 158