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