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- Log -----------------------------------------------------------------
commit 1acee63da4b98fecdb59b3ce4b67a4d5fbd21323
Author: Gary V. Vaughan <g...@gnu.org>
Date: Wed Nov 26 19:36:47 2014 +0000
ltdl: fix a long standing duplicate `-ldl' bug in the link line.
* m4/ltdl.m4 (LT_LIB_DLLOAD): Save contents of LIBS before
calling AC_SEARCH_LIBS, which prepends to LIBS by default, and
restore afterwards. We set LIBADD_DLOPEN and LIBADD_SHL_LOAD
so that dynamic loader libraries can be added selectively only
where they are needed.
* NEWS: Update.
Signed-off-by: Gary V. Vaughan <g...@gnu.org>
-----------------------------------------------------------------------
Summary of changes:
NEWS | 11 +++++++++++
m4/ltdl.m4 | 2 ++
2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/NEWS b/NEWS
index 75da6ea..2782511 100644
--- a/NEWS
+++ b/NEWS
@@ -12,10 +12,21 @@ NEWS - list of user-visible changes between releases of GNU
Libtool
- Installation of 'libtoolize' once again obeys '--program-prefix',
'--program-suffix' and '--program-transform-name' configure options.
+
- `libtoolize` doesn't remove any files that it can't reinstall,
including old versions of the snippet directory, and gnulib's
version of the argz module and supporting files.
+** Important incompatible changes:
+
+ - LT_LIB_DLLOAD no longer prepends -ldl or -ldld to LIBS, causing
+ duplicate occurrences in libltdl link lines. If you need to
+ add a library for dlopen() or shl_load() in your Makefile, then
+ use $(LIBADD_DLOPEN) or $(LIBADD_SHL_LOAD) respectively. If you
+ are using libltdl, this all happens automatically, and the only
+ difference you'll see is no more duplicated library names in the
+ verbose link line.
+
** Changes in supported systems or compilers:
- Preliminary support for tcc on linux*. Although it already worked
diff --git a/m4/ltdl.m4 b/m4/ltdl.m4
index eeb37ac..4119844 100644
--- a/m4/ltdl.m4
+++ b/m4/ltdl.m4
@@ -651,6 +651,7 @@ LT_DLLOADERS=
AC_SUBST([LT_DLLOADERS])
AC_LANG_PUSH([C])
+lt_dlload_save_LIBS=$LIBS
LIBADD_DLOPEN=
AC_SEARCH_LIBS([dlopen], [dl],
@@ -734,6 +735,7 @@ dnl This isn't used anymore, but set it for backwards
compatibility
LIBADD_DL="$LIBADD_DLOPEN $LIBADD_SHL_LOAD"
AC_SUBST([LIBADD_DL])
+LIBS=$lt_dlload_save_LIBS
AC_LANG_POP
])# LT_LIB_DLLOAD
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