Revised patch for AC_LTDL_SYS_DLOPEN_DEPLIBS

[Robert Boehne]

address@hidden wrote:
> 
> aix5 should behave just like aix4.
> 
> Dan

OK, here is a revised patch with the changes suggested
by Albert chin and Dan McNichol.  I also modified the
comment slightly.

Robert


-- 
Robert Boehne             Software Engineer
Ricardo Software   Chicago Technical Center
TEL: (630)789-0003 x. 238
FAX: (630)789-0127
email:  address@hidden

2001-07-16  Robert Boehne  <address@hidden>, Tim Mooney  <address@hidden>

        * ltdl.m4 (AC_LTDL_SYS_DLOPEN_DEPLIBS): add cases and comments for
        more platforms, including AIX, Digital/Tru64 UNIX and IRIX.
 

Index: ltdl.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/ltdl.m4,v
retrieving revision 1.25
diff -u -r1.25 ltdl.m4
--- ltdl.m4     2001/07/06 01:08:58     1.25
+++ ltdl.m4     2001/07/17 19:01:39
@@ -70,13 +70,56 @@
 [AC_REQUIRE([AC_CANONICAL_HOST])
 AC_CACHE_CHECK([whether deplibs are loaded by dlopen],
        libltdl_cv_sys_dlopen_deplibs, [dnl
-       # PORTME does your system automatically load deplibs for dlopen()?
+       # PORTME does your system automatically load deplibs for dlopen?
+       # or its logical equivalent (e.g. shl_load for HP-UX < 11)
+       # For now, we just catch OSes we know something about -- in the
+       # future, we'll try test this programmatically.
        libltdl_cv_sys_dlopen_deplibs=unknown
        case "$host_os" in
+       aix3*|aix4.1.*|aix4.2.*)
+         # Unknown whether this is true for these versions of AIX, but
+         # we want this `case' here to explicitly catch those versions.
+         libltdl_cv_sys_dlopen_deplibs=unknown
+         ;;
+       aix[45]*)
+         libltdl_cv_sys_dlopen_deplibs=yes
+         ;;
+       irix[12345]*|irix6.[01]*)
+         # Catch all versions of IRIX before 6.2, and indicate that we don't
+         # know how it worked for any of those versions.
+         libltdl_cv_sys_dlopen_deplibs=unknown
+         ;;
+       irix*)
+         # The case above catches anything before 6.2, and it's known that
+         # at 6.2 and later dlopen does load deplibs.
+         libltdl_cv_sys_dlopen_deplibs=yes
+         ;;
        linux*)
          libltdl_cv_sys_dlopen_deplibs=yes
          ;;
        netbsd*)
+         libltdl_cv_sys_dlopen_deplibs=yes
+         ;;
+       osf[1234]*)
+         # dlopen did load deplibs (at least at 4.x), but until the 5.x series,
+         # it did *not* use an RPATH in a shared library to find objects the
+         # library depends on, so we explictly say `no'.
+         libltdl_cv_sys_dlopen_deplibs=no
+         ;;
+       osf5.0|osf5.0a|osf5.1)
+         # dlopen *does* load deplibs and with the right loader patch applied
+         # it even uses RPATH in a shared library to search for shared objects
+         # that the library depends on, but there's no easy way to know if that
+         # patch is installed.  Since this is the case, all we can really
+         # say is unknown -- it depends on the patch being installed.  If
+         # it is, this changes to `yes'.  Without it, it would be `no'.
+         libltdl_cv_sys_dlopen_deplibs=unknown
+         ;;
+       osf*)
+         # the two cases above should catch all versions of osf <= 5.1.  Read
+         # the comments above for what we know about them.
+         # At > 5.1, deplibs are loaded *and* any RPATH in a shared library
+         # is used to find them so we can finally say `yes'.
          libltdl_cv_sys_dlopen_deplibs=yes
          ;;
        solaris*)