# ===========================================================================

#   https://www.gnu.org/software/autoconf-archive/ax_prog_cc_for_build.html

# ===========================================================================

#

# SYNOPSIS

#

#   AX_PROG_CC_FOR_BUILD

#

# DESCRIPTION

#

#   This macro searches for a C compiler that generates native executables,

#   that is a C compiler that surely is not a cross-compiler. This can be

#   useful if you have to generate source code at compile-time like for

#   example GCC does.

#

#   The macro sets the CC_FOR_BUILD and CPP_FOR_BUILD macros to anything

#   needed to compile or link (CC_FOR_BUILD) and preprocess (CPP_FOR_BUILD).

#   The value of these variables can be overridden by the user by specifying

#   a compiler with an environment variable (like you do for standard CC).

#

#   It also sets BUILD_EXEEXT and BUILD_OBJEXT to the executable and object

#   file extensions for the build platform, and GCC_FOR_BUILD to `yes' if

#   the compiler we found is GCC. All these variables but GCC_FOR_BUILD are

#   substituted in the Makefile.

#

# LICENSE

#

#   Copyright (c) 2008 Paolo Bonzini <bonzini@gnu.org>

#

#   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 9

AU_ALIAS([AC_PROG_CC_FOR_BUILD], [AX_PROG_CC_FOR_BUILD])

AC_DEFUN([AX_PROG_CC_FOR_BUILD], [dnl

AC_REQUIRE([AC_PROG_CC])dnl

AC_REQUIRE([AC_PROG_CPP])dnl

AC_REQUIRE([AC_EXEEXT])dnl

AC_REQUIRE([AC_CANONICAL_HOST])dnl

dnl Use the standard macros, but make them use other variable names

dnl

pushdef([ac_cv_prog_CPP], ac_cv_build_prog_CPP)dnl

pushdef([ac_cv_prog_gcc], ac_cv_build_prog_gcc)dnl

pushdef([ac_cv_prog_cc_works], ac_cv_build_prog_cc_works)dnl

pushdef([ac_cv_prog_cc_cross], ac_cv_build_prog_cc_cross)dnl

pushdef([ac_cv_prog_cc_g], ac_cv_build_prog_cc_g)dnl

pushdef([ac_cv_exeext], ac_cv_build_exeext)dnl

pushdef([ac_cv_objext], ac_cv_build_objext)dnl

pushdef([ac_exeext], ac_build_exeext)dnl

pushdef([ac_objext], ac_build_objext)dnl

pushdef([CC], CC_FOR_BUILD)dnl

pushdef([CPP], CPP_FOR_BUILD)dnl

pushdef([CFLAGS], CFLAGS_FOR_BUILD)dnl

pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl

pushdef([LDFLAGS], LDFLAGS_FOR_BUILD)dnl

pushdef([host], build)dnl

pushdef([host_alias], build_alias)dnl

pushdef([host_cpu], build_cpu)dnl

pushdef([host_vendor], build_vendor)dnl

pushdef([host_os], build_os)dnl

pushdef([ac_cv_host], ac_cv_build)dnl

pushdef([ac_cv_host_alias], ac_cv_build_alias)dnl

pushdef([ac_cv_host_cpu], ac_cv_build_cpu)dnl

pushdef([ac_cv_host_vendor], ac_cv_build_vendor)dnl

pushdef([ac_cv_host_os], ac_cv_build_os)dnl

pushdef([ac_cpp], ac_build_cpp)dnl

pushdef([ac_compile], ac_build_compile)dnl

pushdef([ac_link], ac_build_link)dnl

save_cross_compiling=$cross_compiling

save_ac_tool_prefix=$ac_tool_prefix

cross_compiling=no

ac_tool_prefix=

AC_PROG_CC

AC_PROG_CPP

AC_EXEEXT

ac_tool_prefix=$save_ac_tool_prefix

cross_compiling=$save_cross_compiling

dnl Restore the old definitions

dnl

popdef([ac_link])dnl

popdef([ac_compile])dnl

popdef([ac_cpp])dnl

popdef([ac_cv_host_os])dnl

popdef([ac_cv_host_vendor])dnl

popdef([ac_cv_host_cpu])dnl

popdef([ac_cv_host_alias])dnl

popdef([ac_cv_host])dnl

popdef([host_os])dnl

popdef([host_vendor])dnl

popdef([host_cpu])dnl

popdef([host_alias])dnl

popdef([host])dnl

popdef([LDFLAGS])dnl

popdef([CPPFLAGS])dnl

popdef([CFLAGS])dnl

popdef([CPP])dnl

popdef([CC])dnl

popdef([ac_objext])dnl

popdef([ac_exeext])dnl

popdef([ac_cv_objext])dnl

popdef([ac_cv_exeext])dnl

popdef([ac_cv_prog_cc_g])dnl

popdef([ac_cv_prog_cc_cross])dnl

popdef([ac_cv_prog_cc_works])dnl

popdef([ac_cv_prog_gcc])dnl

popdef([ac_cv_prog_CPP])dnl

dnl Finally, set Makefile variables

dnl

BUILD_EXEEXT=$ac_build_exeext

BUILD_OBJEXT=$ac_build_objext

AC_SUBST(BUILD_EXEEXT)dnl

AC_SUBST(BUILD_OBJEXT)dnl

AC_SUBST([CFLAGS_FOR_BUILD])dnl

AC_SUBST([CPPFLAGS_FOR_BUILD])dnl

AC_SUBST([LDFLAGS_FOR_BUILD])dnl

])