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dnl This Source Code Form is subject to the terms of the Mozilla Public
dnl License, v. 2.0. If a copy of the MPL was not distributed with this
dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
AC_DEFUN([MOZ_EXPAND_LIBS],
[
dnl ========================================================
dnl =
dnl = Check what kind of list files are supported by the
dnl = linker
dnl =
dnl ========================================================
AC_CACHE_CHECK(what kind of list files are supported by the linker,
EXPAND_LIBS_LIST_STYLE,
[echo "int main() {return 0;}" > conftest.${ac_ext}
if AC_TRY_COMMAND(${CC-cc} -o conftest.${OBJ_SUFFIX} -c $CFLAGS $CPPFLAGS conftest.${ac_ext} 1>&5) && test -s conftest.${OBJ_SUFFIX}; then
echo "INPUT(conftest.${OBJ_SUFFIX})" > conftest.list
if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS conftest.list $LIBS 1>&5) && test -s conftest${ac_exeext}; then
EXPAND_LIBS_LIST_STYLE=linkerscript
else
echo "conftest.${OBJ_SUFFIX}" > conftest.list
dnl -filelist is for the OS X linker. We need to try -filelist
dnl first because clang understands @file, but may pass an
dnl oversized argument list to the linker depending on the
dnl contents of @file.
if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS [-Wl,-filelist,conftest.list] $LIBS 1>&5) && test -s conftest${ac_exeext}; then
EXPAND_LIBS_LIST_STYLE=filelist
elif AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS @conftest.list $LIBS 1>&5) && test -s conftest${ac_exeext}; then
EXPAND_LIBS_LIST_STYLE=list
else
EXPAND_LIBS_LIST_STYLE=none
fi
fi
else
dnl We really don't expect to get here, but just in case
AC_ERROR([couldn't compile a simple C file])
fi
rm -rf conftest*])
LIBS_DESC_SUFFIX=desc
AC_SUBST(LIBS_DESC_SUFFIX)
AC_SUBST(EXPAND_LIBS_LIST_STYLE)
if test "$GCC_USE_GNU_LD"; then
AC_CACHE_CHECK(what kind of ordering can be done with the linker,
EXPAND_LIBS_ORDER_STYLE,
[> conftest.order
_SAVE_LDFLAGS="$LDFLAGS"
LDFLAGS="${LDFLAGS} -Wl,--section-ordering-file,conftest.order"
AC_TRY_LINK([], [],
EXPAND_LIBS_ORDER_STYLE=section-ordering-file,
EXPAND_LIBS_ORDER_STYLE=)
LDFLAGS="$_SAVE_LDFLAGS"
if test -z "$EXPAND_LIBS_ORDER_STYLE"; then
if AC_TRY_COMMAND(${CC-cc} ${DSO_LDOPTS} ${LDFLAGS} -o ${DLL_PREFIX}conftest${DLL_SUFFIX} -Wl,--verbose 2> /dev/null | sed -n '/^===/,/^===/p' | grep '\.text'); then
EXPAND_LIBS_ORDER_STYLE=linkerscript
else
EXPAND_LIBS_ORDER_STYLE=none
fi
rm -f ${DLL_PREFIX}conftest${DLL_SUFFIX}
fi])
fi
AC_SUBST(EXPAND_LIBS_ORDER_STYLE)
])
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