1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/build/autoconf/expandlibs.m4 Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,66 @@
1.4 +dnl This Source Code Form is subject to the terms of the Mozilla Public
1.5 +dnl License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 +dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
1.7 +
1.8 +AC_DEFUN([MOZ_EXPAND_LIBS],
1.9 +[
1.10 +dnl ========================================================
1.11 +dnl =
1.12 +dnl = Check what kind of list files are supported by the
1.13 +dnl = linker
1.14 +dnl =
1.15 +dnl ========================================================
1.16 +
1.17 +AC_CACHE_CHECK(what kind of list files are supported by the linker,
1.18 + EXPAND_LIBS_LIST_STYLE,
1.19 + [echo "int main() {return 0;}" > conftest.${ac_ext}
1.20 + if AC_TRY_COMMAND(${CC-cc} -o conftest.${OBJ_SUFFIX} -c $CFLAGS $CPPFLAGS conftest.${ac_ext} 1>&5) && test -s conftest.${OBJ_SUFFIX}; then
1.21 + echo "INPUT(conftest.${OBJ_SUFFIX})" > conftest.list
1.22 + if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS conftest.list $LIBS 1>&5) && test -s conftest${ac_exeext}; then
1.23 + EXPAND_LIBS_LIST_STYLE=linkerscript
1.24 + else
1.25 + echo "conftest.${OBJ_SUFFIX}" > conftest.list
1.26 + dnl -filelist is for the OS X linker. We need to try -filelist
1.27 + dnl first because clang understands @file, but may pass an
1.28 + dnl oversized argument list to the linker depending on the
1.29 + dnl contents of @file.
1.30 + if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS [-Wl,-filelist,conftest.list] $LIBS 1>&5) && test -s conftest${ac_exeext}; then
1.31 + EXPAND_LIBS_LIST_STYLE=filelist
1.32 + elif AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS @conftest.list $LIBS 1>&5) && test -s conftest${ac_exeext}; then
1.33 + EXPAND_LIBS_LIST_STYLE=list
1.34 + else
1.35 + EXPAND_LIBS_LIST_STYLE=none
1.36 + fi
1.37 + fi
1.38 + else
1.39 + dnl We really don't expect to get here, but just in case
1.40 + AC_ERROR([couldn't compile a simple C file])
1.41 + fi
1.42 + rm -rf conftest*])
1.43 +
1.44 +LIBS_DESC_SUFFIX=desc
1.45 +AC_SUBST(LIBS_DESC_SUFFIX)
1.46 +AC_SUBST(EXPAND_LIBS_LIST_STYLE)
1.47 +
1.48 +if test "$GCC_USE_GNU_LD"; then
1.49 + AC_CACHE_CHECK(what kind of ordering can be done with the linker,
1.50 + EXPAND_LIBS_ORDER_STYLE,
1.51 + [> conftest.order
1.52 + _SAVE_LDFLAGS="$LDFLAGS"
1.53 + LDFLAGS="${LDFLAGS} -Wl,--section-ordering-file,conftest.order"
1.54 + AC_TRY_LINK([], [],
1.55 + EXPAND_LIBS_ORDER_STYLE=section-ordering-file,
1.56 + EXPAND_LIBS_ORDER_STYLE=)
1.57 + LDFLAGS="$_SAVE_LDFLAGS"
1.58 + if test -z "$EXPAND_LIBS_ORDER_STYLE"; then
1.59 + if AC_TRY_COMMAND(${CC-cc} ${DSO_LDOPTS} ${LDFLAGS} -o ${DLL_PREFIX}conftest${DLL_SUFFIX} -Wl,--verbose 2> /dev/null | sed -n '/^===/,/^===/p' | grep '\.text'); then
1.60 + EXPAND_LIBS_ORDER_STYLE=linkerscript
1.61 + else
1.62 + EXPAND_LIBS_ORDER_STYLE=none
1.63 + fi
1.64 + rm -f ${DLL_PREFIX}conftest${DLL_SUFFIX}
1.65 + fi])
1.66 +fi
1.67 +AC_SUBST(EXPAND_LIBS_ORDER_STYLE)
1.68 +
1.69 +])
