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# ===========================================================================
# http://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 Diego Elio Pettenò <flameeyes@gmail.com>
# 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 <http://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 2
dnl Get a default for CC_FOR_BUILD to put into Makefile.
AC_DEFUN([AX_CC_FOR_BUILD], [
AC_REQUIRE([AC_PROG_CC])
dnl Declare the new variables
AC_ARG_VAR([CC_FOR_BUILD],
[Host's C compiler command for cross-compilation @<:@default=$(CC)@:>@])
AC_ARG_VAR([BUILD_CFLAGS],
[Host's C compiler flags @<:@default=$(CFLAGS)@:>@])
AC_ARG_VAR([BUILD_LDFLAGS],
[Host's linker flags @<:@default=$(LDFLAGS)@:>@])
dnl Put a plausible default for CC_FOR_BUILD in Makefile.
if test -z "$CC_FOR_BUILD"; then
if test "x$cross_compiling" = "xno"; then
CC_FOR_BUILD=${CC}
else
AC_CHECK_PROGS(CC_FOR_BUILD, [gcc cc])
fi
fi
if test "x${BUILD_CFLAGS+set}" != "xset" ; then
if test "x$cross_compiling" = "xyes" ; then
BUILD_CFLAGS=
else
BUILD_CFLAGS=${CFLAGS}
fi
fi
if test "x${BUILD_LDFLAGS+set}" != "xset" ; then
if test "x$cross_compiling" = "xyes" ; then
BUILD_LDFLAGS=
else
BUILD_LDFLAGS=${LDFLAGS}
fi
fi
dnl 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} ${LDFLAGS} ${CFLAGS} -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
|
