[PATCH 07/12] Declare enable/disable aix-soname options.

Declare filename based shared library versioning on AIX.
* m4/ltoptions.m4: (_LT_ENABLE_AIX_SONAME) New. Provides
--enable-aix-soname commandline option. Declares the
'shared_archive_member_spec' libtool variable.
(_LT_SET_OPTIONS) Add LT_INIT options "aix-soname",
"disable-aix-soname". Default is disabled.
* m4/ltdl.m4: (LT_SHARED_LIB_MEMBER) Define, based on the value of
the shared_archive_member_spec libtool variable.
---
 m4/ltdl.m4      |    5 +++++
 m4/ltoptions.m4 |   32 ++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/m4/ltdl.m4 b/m4/ltdl.m4
index 28c39a9..c4a3171 100644
--- a/m4/ltdl.m4
+++ b/m4/ltdl.m4
@@ -566,6 +566,11 @@ if test "$libltdl_cv_shrext" != "$libltdl_cv_shlibext"; then
   AC_DEFINE_UNQUOTED([LT_SHARED_EXT], ["$libltdl_cv_shrext"],
     [Define to the shared library suffix, say, ".dylib".])
 fi
+if test -n "$shared_archive_member_spec"; then
+  m4_pattern_allow([LT_SHARED_LIB_MEMBER])dnl
+  AC_DEFINE_UNQUOTED([LT_SHARED_LIB_MEMBER], ["($shared_archive_member_spec.o)"],
+    [Define to the shared archive member specification, say "(shr.o)".])
+fi
 ])# LT_SYS_MODULE_EXT
 
 # Old name:
diff --git a/m4/ltoptions.m4 b/m4/ltoptions.m4
index 13da361..6f53562 100644
--- a/m4/ltoptions.m4
+++ b/m4/ltoptions.m4
@@ -82,6 +82,8 @@ m4_if([$1],[LT_INIT],[
   _LT_UNLESS_OPTIONS([LT_INIT], [pic-only no-pic], [_LT_WITH_PIC])
   _LT_UNLESS_OPTIONS([LT_INIT], [fast-install disable-fast-install],
 		   [_LT_ENABLE_FAST_INSTALL])
+  _LT_UNLESS_OPTIONS([LT_INIT], [aix-soname disable-aix-soname],
+		   [_LT_ENABLE_AIX_SONAME(no)])
   ])
 ])# _LT_SET_OPTIONS
 
@@ -319,6 +321,36 @@ dnl AC_DEFUN([AC_ENABLE_FAST_INSTALL], [])
 dnl AC_DEFUN([AM_DISABLE_FAST_INSTALL], [])
 
 
+# _LT_ENABLE_AIX_SONAME([DEFAULT])
+# ----------------------------------
+# implement the --enable-aix-soname flag, and support the `aix-soname'
+# and `disable-aix-soname' LT_INIT options.
+# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `no'.
+m4_define([_LT_ENABLE_AIX_SONAME],
+[m4_define([_LT_ENABLE_AIX_SONAME_DEFAULT], [m4_if($1, yes, yes, no)])dnl
+AC_ARG_ENABLE([aix-soname],
+    [AS_HELP_STRING([--enable-aix-soname],
+    [On AIX, do filename based shared library versioning (using Import Files),
+      for use with runtime linking only. @<:@default=]_LT_ENABLE_AIX_SONAME_DEFAULT[@:>@.])],
+    [case $enableval in
+      yes) enable_aix_soname=yes ;;
+      no) enable_aix_soname=no ;;
+      *) AC_MSG_ERROR([invalid value for 'aix-soname']) ;;
+    esac],
+    [enable_aix_soname=]_LT_ENABLE_AIX_SONAME_DEFAULT)
+    case $host_cpu-$host_os in
+      powerpc*-aix*) ;;
+      *) enable_aix_soname=no ;;
+    esac
+
+_LT_DECL([], [shared_archive_member_spec], [0],
+    [Shared archive member basename, for filename based shared library versioning on AIX])dnl
+])# _LT_ENABLE_AIX_SONAME
+
+LT_OPTION_DEFINE([LT_INIT], [aix-soname], [_LT_ENABLE_AIX_SONAME([yes])])
+LT_OPTION_DEFINE([LT_INIT], [disable-aix-soname], [_LT_ENABLE_AIX_SONAME([no])])
+
+
 # _LT_WITH_PIC([MODE])
 # --------------------
 # implement the --with-pic flag, and support the `pic-only' and `no-pic'
-- 
1.7.3.4