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* libltdl/m4/ltdl.m4 (_LTDL_SETUP): Define

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LTDL_DLOPEN_SELF_WORKS, depending upon lt_cv_dlopen_self.
* libltdl/loaders/dlopen.c (vm_open) [!LTDL_DLOPEN_SELF_WORKS]:
Fail for dlopen(NULL), so that the preopen loader is used.  This
fixes mdemo-exec.test failures on AIX where dlopen(NULL)
succeeds but dlsym resolves no symbol.
* NEWS: Update.
Report by Rainer Tammer.
This commit is contained in:
Ralf Wildenhues 2008-01-12 17:00:51 +00:00
parent 12108ff510
commit 75142db4f8
4 changed files with 25 additions and 2 deletions
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9
ChangeLog
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@ -1,5 +1,14 @@
2008-01-12 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* libltdl/m4/ltdl.m4 (_LTDL_SETUP): Define
LTDL_DLOPEN_SELF_WORKS, depending upon lt_cv_dlopen_self.
* libltdl/loaders/dlopen.c (vm_open) [!LTDL_DLOPEN_SELF_WORKS]:
Fail for dlopen(NULL), so that the preopen loader is used. This
fixes mdemo-exec.test failures on AIX where dlopen(NULL)
succeeds but dlsym resolves no symbol.
* NEWS: Update.
Report by Rainer Tammer.
* tests/am-subdir.at: Drop unused variables.
* tests/configure-iface.at: Likewise.
* tests/ctor.at: Likewise.

1
NEWS
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@ -116,6 +116,7 @@ New in 2.1a: 2008-??-??; CVS version 2.1a, Libtool team:
- Some configure variables have been renamed to fix caching:
lt_prog_compiler_pic_works to lt_cv_prog_compiler_pic_works
lt_prog_compiler_static_works to lt_cv_prog_compiler_static_works.
- Fix 1.9b regression: lt_dlopen(NULL) works on AIX again.
- Loads of smaller bug fixes.

9
libltdl/loaders/dlopen.c
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@ -1,7 +1,7 @@
/* loader-dlopen.c -- dynamic linking with dlopen/dlsym
Copyright (C) 1998, 1999, 2000, 2004, 2006,
2007 Free Software Foundation, Inc.
2007, 2008 Free Software Foundation, Inc.
Written by Thomas Tanner, 1998
NOTE: The canonical source of this file is maintained with the
@ -178,6 +178,13 @@ vm_open (lt_user_data LT__UNUSED loader_data, const char *filename,
#endif
}
/* On AIX, dlopen(NULL) succeeds but dlsym of symbols fails.
In this case, fail here to let the preopen loader do the job. */
#ifndef LTDL_DLOPEN_SELF_WORKS
if (!filename)
module = NULL;
else
#endif
module = dlopen (filename, module_flags);
if (!module)

6
libltdl/m4/ltdl.m4
View File

@ -338,6 +338,12 @@ m4_require([_LT_HEADER_DLFCN])dnl
m4_require([_LT_CHECK_DLPREOPEN])dnl
m4_require([_LT_DECL_SED])dnl
# lt_cv_dlopen_self gets defined by LT_SYS_DLOPEN_SELF, called by LT_INIT
if test "$lt_cv_dlopen_self" = yes; then
AC_DEFINE([LTDL_DLOPEN_SELF_WORKS], [1],
[Define if dlopen(NULL) is able to resolve symbols from the main program.])
fi
dnl Don't require this, or it will be expanded earlier than the code
dnl that sets the variables it relies on:
_LT_ENABLE_INSTALL