libtool: optional filename-based shlib versioning on aix.

Support filename-based shared library versioning on AIX with the
lib.so library filename extension, which is used with runtime
linking only. Runtime linking is enabled by the -brtl linker
flag for executables and the -G linker flag for Shared Objects.
The behaviour is similar to Linux/SVR4 DT_SONAME, hence the name
"aix-soname=svr4".
* Makefile.am (TESTS_ENVIRONMENT): Pass with_aix_soname value
via lt_cv_with_aix_soname into testsuite.
* configure.ac: AC_SUBST with_aix_soname for testsuite.
* libltdl/loaders/dlopen.c (vm_open): Use RTLD_MEMBER flag for
dlopen when the filename does specify an archive member between
"()". Otherways, retry with appending LT_SHARED_LIB_MEMBER when
loading fails without but archive file seems to exist.
* m4/libtool.m4 (dynamic_linker): Describe configured shared
library versioning variant according to with_aix_soname and
runtime linking.
(soname_spec, library_names_spec, shlibpath_overrides_runpath)
(postinstall_cmds, postuninstall_cmds, hardcode_direct)
(hardcode_direct_absolute, no_undefined_flag)
(allow_undefined_flag): Set according to with_aix_soname and
runtime linking configuration.
(export_symbols_cmds): Decorate symbols with the weak keyword.
(archive_expsym_cmds): Create both shared libraries according to
with_aix_soname and runtime linking configuration. Filter -brtl
linker flag from compiler_flags for shared libraries due to its
side effects.
(enable_static): Respect with_aix_soname for disabling as well.
* m4/ltdl.m4 (LT_SHARED_LIB_MEMBER): Define, set based on the
value of the shared_archive_member_spec libtool variable.
* m4/ltoptions.m4 (_LT_WITH_AIX_SONAME): New. Provides
commandline option --with-aix-soname=aix|svr4|both. Declares
$shared_archive_member_spec as libtool variable.
(_LT_SET_OPTIONS): Define LT_INIT options "aix-soname=aix",
"aix-soname=svr4", "aix-soname=both". Default is
"aix-soname=aix".
* doc/libtool.texi (LT_INIT): Document new options.
* tests/deplibs-ident.at: To define whether this test should
XFAIL, use hardcode_action, hardcode_direct,
hardcode_direct_absolute configuration settings instead of
platforms aix, bitrig, hppa-hpux, interix or openbsd.
* tests/versioning.at: When shared_archive_member_spec is defined
and LDFLAGS contain -brtl, we can run the versioning check.
* NEWS: Update.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>

2 files changed, 17 insertions, 8 deletions

diff --git a/tests/deplibs-ident.at b/tests/deplibs-ident.at
index 9c5e823d..172885f4 100644
--- a/tests/deplibs-ident.at
+++ b/tests/deplibs-ident.at
@@ -67,10 +67,13 @@ int main() { return a1() + a2() + a3() + c(); }
   AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o b$EXEEXT b.$OBJEXT ../liba1.la ../liba2.la ../liba3.la ../../c/libcee.la -rpath /nowhere],
 	   [0],[stdout],[ignore])
   AT_CHECK([$EGREP 'cee.*cee' stdout], 1, [ignore], [ignore])
-  AT_XFAIL_IF([case $host in
-                 *-*-aix*|*-*-bitrig*|hppa*-*-hpux*|*-*-interix*|*-*-openbsd*) false;;
-                 *):;;
-               esac])
+  AT_XFAIL_IF([dnl
+    eval `$LIBTOOL --config | $EGREP '^hardcode_(direct|direct_absolute|action)='`
+    case $hardcode_action,$hardcode_direct,$hardcode_direct_absolute in
+      relink,yes,no) :;;
+      *,no,*) :;;
+      *) false;;
+    esac])
   dnl This is currently broken in libtool
 )
 
diff --git a/tests/versioning.at b/tests/versioning.at
index dac032ca..629cb7f4 100644
--- a/tests/versioning.at
+++ b/tests/versioning.at
@@ -24,7 +24,7 @@
 AT_SETUP([versioning])
 AT_KEYWORDS([libtool])
 
-eval "`$LIBTOOL --config | $EGREP '^(objdir|host_os)='`"
+eval "`$LIBTOOL --config | $EGREP '^(objdir|host_os|shared_archive_member_spec)='`"
 
 # Setup some library and program sources:
 # a library (a1), a new revision (a2), a compatible update (a3),
@@ -228,9 +228,15 @@ AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o liba.la liba4.lo ]dnl
 AT_CHECK([$LIBTOOL --mode=install cp liba.la $libdir], [], [ignore], [ignore])
 AT_CHECK([$LIBTOOL --mode=clean rm -f liba.la], [], [ignore], [ignore])
 
-# This test does not work on AIX, not even with runtimelinking, because
-# the linker always records the unversioned name as dependency.
-AT_CHECK([:; case $host_os in aix*) exit 77;; esac])
+# On AIX, this test only works when the 'aix-soname' feature is enabled and
+# active, which is reflected in shared_archive_member_spec being set and LDFLAGS
+# containing -brtl. Otherwise, even with runtime linking, the linker always
+# records the unversioned name as dependency.
+AT_CHECK([:; case $host_os,$shared_archive_member_spec,$LDFLAGS in
+aix*,,*) exit 77 ;;
+aix*,*,*-brtl*) ;;
+aix*,*) exit 77 ;;
+esac])
 
 test_installed