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Re: [libstdc++] Port-specific symbol exports, porting notes
On Sun, Jul 06, 2003 at 03:56:26PM -0400, Phil Edwards wrote:
> Is there any particular need for GCC 3.4 to support symbol versioning under
> binutils 2.11? The globbing fix was in 2.12. I'd prefer to remove the
> "if it can magically handle wildcards" test altogether, which will restore
And after testing, this is how it looks. For 3.3, we required either
binutils 2.12 or a gnu linker with a Linux vendor backport. I have a
difficult time imagining Linux vendors shipping 3.4 but not a post-2.11
binutils, so I submit that this fallback test has served its purpose and can
go gently into that good night. (And many thanks to Jakub for originally
creating it.)
2003-07-06 Phil Edwards <pme@gcc.gnu.org>
* acinclude.m4 (GLIBCXX_ENABLE_SYMVERS): Do not test for binutils
2.11 with globbing backport fix.
* aclocal.m4, configure: Regenerated.
Index: acinclude.m4
===================================================================
RCS file: /cvs/gcc/gcc/libstdc++-v3/acinclude.m4,v
retrieving revision 1.254
diff -u -3 -p -r1.254 acinclude.m4
--- acinclude.m4 6 Jul 2003 04:07:25 -0000 1.254
+++ acinclude.m4 6 Jul 2003 20:29:33 -0000
@@ -299,7 +299,8 @@ dnl
dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
dnl Define LD, with_gnu_ld, and (possibly) glibcxx_gnu_ld_version as
-dnl side-effects of testing.
+dnl side-effects of testing. The last will be a single integer, e.g.,
+dnl version 1.23.45.0.67.89 will set glibcxx_gnu_ld_version to 12345.
dnl
dnl GLIBCXX_CHECK_LINKER_FEATURES
AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
@@ -2266,26 +2267,13 @@ glibcxx_min_gnu_ld_version=21400
# above.
if test $enable_symvers = yes ; then
if test $with_gnu_ld = yes &&
- test $glibcxx_shared_libgcc = yes ;
+ test $glibcxx_shared_libgcc = yes ;
then
if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
- enable_symvers=gnu
+ enable_symvers=gnu
else
- ac_test_CFLAGS="${CFLAGS+set}"
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS='-shared -Wl,--version-script,conftest.map'
+ # The right tools, the right setup, but too old. Fallbacks?
enable_symvers=no
- changequote(,)
- echo 'FOO { global: f[a-z]o; local: *; };' > conftest.map
- changequote([,])
- AC_TRY_LINK([int foo;],, enable_symvers=gnu)
- if test "$ac_test_CFLAGS" = set; then
- CFLAGS="$ac_save_CFLAGS"
- else
- # this is the suspicious part
- CFLAGS=''
- fi
- rm -f conftest.map
fi
else
# just fail for now