ax_cc_for_build.m4

# ===========================================================================
#     https://www.gnu.org/software/autoconf-archive/ax_cc_for_build.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_CC_FOR_BUILD
#
# DESCRIPTION
#
#   Find a build-time compiler. Sets CC_FOR_BUILD and EXEEXT_FOR_BUILD.
#
# LICENSE
#
#   Copyright (c) 2010 Reuben Thomas <rrt@sc3d.org>
#   Copyright (c) 1999 Richard Henderson <rth@redhat.com>
#
#   This program is free software: you can redistribute it and/or modify it
#   under the terms of the GNU General Public License as published by the
#   Free Software Foundation, either version 3 of the License, or (at your
#   option) any later version.
#
#   This program is distributed in the hope that it will be useful, but
#   WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
#   Public License for more details.
#
#   You should have received a copy of the GNU General Public License along
#   with this program. If not, see <https://www.gnu.org/licenses/>.
#
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#   gives unlimited permission to copy, distribute and modify the configure
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#serial 3

dnl Get a default for CC_FOR_BUILD to put into Makefile.
AC_DEFUN([AX_CC_FOR_BUILD],
[# Put a plausible default for CC_FOR_BUILD in Makefile.
if test -z "$CC_FOR_BUILD"; then
  if test "x$cross_compiling" = "xno"; then
    CC_FOR_BUILD='$(CC)'
  else
    CC_FOR_BUILD=gcc
  fi
fi
AC_SUBST(CC_FOR_BUILD)
# Also set EXEEXT_FOR_BUILD.
if test "x$cross_compiling" = "xno"; then
  EXEEXT_FOR_BUILD='$(EXEEXT)'
else
  AC_CACHE_CHECK([for build system executable suffix], bfd_cv_build_exeext,
    [rm -f conftest*
     echo 'int main () { return 0; }' > conftest.c
     bfd_cv_build_exeext=
     ${CC_FOR_BUILD} -o conftest conftest.c 1>&5 2>&5
     for file in conftest.*; do
       case $file in
       *.c | *.o | *.obj | *.ilk | *.pdb) ;;
       *) bfd_cv_build_exeext=`echo $file | sed -e s/conftest//` ;;
       esac
     done
     rm -f conftest*
     test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no])
  EXEEXT_FOR_BUILD=""
  test x"${bfd_cv_build_exeext}" != xno && EXEEXT_FOR_BUILD=${bfd_cv_build_exeext}
fi
AC_SUBST(EXEEXT_FOR_BUILD)])dnl