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* configure.ac: Add user-friendly check for native x86_64-linux multilibs. * configure: Regenerate.

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git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@205975 138bc75d-0d04-0410-961f-82ee72b054a4
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fxcoudert 2013-12-13 21:42:02 +00:00 committed by Tom Tromey
parent dc76d75756
commit afc0578da2
3 changed files with 46 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2013-12-13 Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
* configure.ac: Add user-friendly check for native x86_64-linux
multilibs.
* configure: Regenerate.
2013-11-23 Alan Modra <amodra@gmail.com>
* config.sub, config.guess: Import from upstream.

20
configure vendored
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@ -7500,6 +7500,26 @@ if test x${is_cross_compiler} = xyes ; then
target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
fi
# Special user-friendly check for native x86_64-linux build, if
# multilib is not explicitly enabled.
case "$target:$have_compiler:$host:$target:$enable_multilib" in
x86_64-*linux*:yes:$build:$build:)
# Make sure we have a developement environment that handles 32-bit
dev64=no
echo "int main () { return 0; }" > conftest.c
${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
if test $? = 0 ; then
if test -s conftest || test -s conftest.exe ; then
dev64=yes
fi
fi
rm -f conftest*
if test x${dev64} != xyes ; then
as_fn_error "I suspect your system does not have 32-bit developement libraries (libc and headers). If you have them, rerun configure with --enable-multilib. If you do not have them, and want to build a 64-bit-only compiler, rerun configure with --disable-multilib." "$LINENO" 5
fi
;;
esac
# Default to --enable-multilib.
if test x${enable_multilib} = x ; then
target_configargs="--enable-multilib ${target_configargs}"

20
configure.ac
View File

@ -2879,6 +2879,26 @@ if test x${is_cross_compiler} = xyes ; then
target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
fi
# Special user-friendly check for native x86_64-linux build, if
# multilib is not explicitly enabled.
case "$target:$have_compiler:$host:$target:$enable_multilib" in
x86_64-*linux*:yes:$build:$build:)
# Make sure we have a developement environment that handles 32-bit
dev64=no
echo "int main () { return 0; }" > conftest.c
${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
if test $? = 0 ; then
if test -s conftest || test -s conftest.exe ; then
dev64=yes
fi
fi
rm -f conftest*
if test x${dev64} != xyes ; then
AC_MSG_ERROR([I suspect your system does not have 32-bit developement libraries (libc and headers). If you have them, rerun configure with --enable-multilib. If you do not have them, and want to build a 64-bit-only compiler, rerun configure with --disable-multilib.])
fi
;;
esac
# Default to --enable-multilib.
if test x${enable_multilib} = x ; then
target_configargs="--enable-multilib ${target_configargs}"