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Diffstat (limited to 'm4/ax_cc_for_build.m4')
| -rw-r--r-- | m4/ax_cc_for_build.m4 | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/m4/ax_cc_for_build.m4 b/m4/ax_cc_for_build.m4 new file mode 100644 index 0000000..822d422 --- /dev/null +++ b/m4/ax_cc_for_build.m4 @@ -0,0 +1,105 @@ +# =========================================================================== +# 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 |