Bug 790132 - Add a test to make sure media sniffing occurs only when we want. r=bz
[gecko.git] / build / autoconf / expandlibs.m4
blobbfe6a63006ca2b4f416a570423eaf3536ea4ecb5
1 dnl This Source Code Form is subject to the terms of the Mozilla Public
2 dnl License, v. 2.0. If a copy of the MPL was not distributed with this
3 dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
5 AC_DEFUN([MOZ_EXPAND_LIBS],
7 dnl ========================================================
8 dnl =
9 dnl = Check what kind of list files are supported by the
10 dnl = linker
11 dnl =
12 dnl ========================================================
14 AC_CACHE_CHECK(what kind of list files are supported by the linker,
15     EXPAND_LIBS_LIST_STYLE,
16     [echo "int main() {return 0;}" > conftest.${ac_ext}
17      if AC_TRY_COMMAND(${CC-cc} -o conftest.${OBJ_SUFFIX} -c $CFLAGS $CPPFLAGS conftest.${ac_ext} 1>&5) && test -s conftest.${OBJ_SUFFIX}; then
18          echo "INPUT(conftest.${OBJ_SUFFIX})" > conftest.list
19          if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS conftest.list $LIBS 1>&5) && test -s conftest${ac_exeext}; then
20              EXPAND_LIBS_LIST_STYLE=linkerscript
21          else
22              echo "conftest.${OBJ_SUFFIX}" > conftest.list
23              if AC_TRY_COMMAND(${CC-cc} -o conftest${ac_exeext} $LDFLAGS @conftest.list $LIBS 1>&5) && test -s conftest${ac_exeext}; then
24                  EXPAND_LIBS_LIST_STYLE=list
25              else
26                  EXPAND_LIBS_LIST_STYLE=none
27              fi
28          fi
29      else
30          dnl We really don't expect to get here, but just in case
31          AC_ERROR([couldn't compile a simple C file])
32      fi
33      rm -rf conftest*])
35 LIBS_DESC_SUFFIX=desc
36 AC_SUBST(LIBS_DESC_SUFFIX)
37 AC_SUBST(EXPAND_LIBS_LIST_STYLE)
39 if test "$GCC_USE_GNU_LD"; then
40     AC_CACHE_CHECK(what kind of ordering can be done with the linker,
41         EXPAND_LIBS_ORDER_STYLE,
42         [> conftest.order
43          _SAVE_LDFLAGS="$LDFLAGS"
44          LDFLAGS="${LDFLAGS} -Wl,--section-ordering-file,conftest.order"
45          AC_TRY_LINK([], [],
46              EXPAND_LIBS_ORDER_STYLE=section-ordering-file,
47              EXPAND_LIBS_ORDER_STYLE=)
48          LDFLAGS="$_SAVE_LDFLAGS"
49          if test -z "$EXPAND_LIBS_ORDER_STYLE"; then
50              if AC_TRY_COMMAND(${CC-cc} ${DSO_LDOPTS} ${LDFLAGS} -o ${DLL_PREFIX}conftest${DLL_SUFFIX} -Wl,--verbose 2> /dev/null | sed -n '/^===/,/^===/p' | grep '\.text'); then
51                  EXPAND_LIBS_ORDER_STYLE=linkerscript
52              else
53                  EXPAND_LIBS_ORDER_STYLE=none
54              fi
55              rm -f ${DLL_PREFIX}conftest${DLL_SUFFIX}
56          fi])
58 AC_SUBST(EXPAND_LIBS_ORDER_STYLE)