Re: question about AC_LTDL_SYS_DLOPEN_DEPLIBS

[Robert Boehne]

Tim Mooney wrote:
> 
> In regard to: Re: question about AC_LTDL_SYS_DLOPEN_DEPLIBS, Gary V....:
> 
> >On Thursday 12 July 2001  8:12 pm, Tim Mooney wrote:
> >> I'm not 100% sure I know what
> >>
> >>      whether deplibs are loaded by dlopen
> >>
> >> means.  Does it mean:
> >>
> >>      If you explicitly load a shared object via dlopen(), are any shared
> >>      objects that it depends on loaded for you automatically?
> >
> >Yes, exactly that.
> 
> Does this macro apply at all to platforms that have some other mechanism
> of dynamically loading a shared object (e.g. HP-UX 10.x and earlier)?
> 
> The first paragraph of the dlopen() man page on Tru64 UNIX 5.1 (and 4.0f)
> says that
> 
> The dlopen function attempts to load the specified file in the address space
> of the process, resolving symbols as appropriate.  Any libraries that the
> specified file depends upon are also loaded.
> 
> On IRIX 6.5.x, it's not nearly so clear, but that man page does say
> (when talking about DSOs that are flaged for delayed loading, and I'm
> guessing the same applies elsewhere):
> 
> If it has any entries in its
> library list that are not marked LL_DELAY_LOAD, the DSOs that are not
> delay-loaded are added recursively (breadth-first).  Depending on the
> order of calls to delay-loaded DSOs, the order of DSOs on the rld-list
> might be different from one run of a program to the next.
> 
> Of course, if I really wanted to test on IRIX it could be tested
> programmatically, but I'm not sure I want to whip up the test case to
> do it.
> 
> I think the enclosed patch should be correct, for at least recent versions
> of both Tru64 and IRIX.
> 
> Tim

Tim:

I added AIX to your list and wrote a test program to test it on
both IRIX and AIX.  The dependent lib was opened under irix 6.5.8
and aix 4.3.3.  Here is a slightly revised patch against HEAD.

OK to commit?

Robert


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

2001-07-13  Tim Mooney  <address@hidden>

       * ltdl.m4 (AC_LTDL_SYS_DLOPEN_DEPLIBS): fill in yes for
       recent 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     2001/07/13 22:16:16
@@ -73,10 +73,24 @@
        # PORTME does your system automatically load deplibs for dlopen()?
        libltdl_cv_sys_dlopen_deplibs=unknown
        case "$host_os" in
+       aix4*)
+         # Unknown whether this is true for aix5 or aix4.2-
+         libltdl_cv_sys_dlopen_deplibs=yes
+         ;;
+       iris6*)
+         # Unknown if this has always been true, even for early versions of
+         # 6.x, but it's true as of 6.5.x
+         libltdl_cv_sys_dlopen_deplibs=yes
+         ;;
        linux*)
          libltdl_cv_sys_dlopen_deplibs=yes
          ;;
        netbsd*)
+         libltdl_cv_sys_dlopen_deplibs=yes
+         ;;
+       osf*)
+         # Unknown if this has always been true (i.e. for 1.2 - 3.2g).  It
+         # is true for 4.x and later.
          libltdl_cv_sys_dlopen_deplibs=yes
          ;;
        solaris*)