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| author | Gary V. Vaughan <gary@gnu.org> | 2014-11-26 19:36:47 +0000 |
|---|---|---|
| committer | Gary V. Vaughan <gary@gnu.org> | 2014-11-26 19:47:43 +0000 |
| commit | 1acee63da4b98fecdb59b3ce4b67a4d5fbd21323 (patch) | |
| tree | 1ac0737f2e190a7278e2ee2a9670fd4ce43cb5eb | |
| parent | 845ff0b76837a630eb54d23eb66912339b589a65 (diff) | |
| download | libtool-1acee63da4b98fecdb59b3ce4b67a4d5fbd21323.tar.gz | |
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 <gary@gnu.org>
| -rw-r--r-- | NEWS | 11 | ||||
| -rw-r--r-- | m4/ltdl.m4 | 2 |
2 files changed, 13 insertions, 0 deletions
@@ -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 $(LIBADD_SHL_LOAD) respectively. If you + are using libltdl, this all happens automatically, and the only + difference you'll see is no more duplicated library names in the + verbose link line. + ** Changes in supported systems or compilers: - Preliminary support for tcc on linux*. Although it already worked @@ -651,6 +651,7 @@ LT_DLLOADERS= AC_SUBST([LT_DLLOADERS]) AC_LANG_PUSH([C]) +lt_dlload_save_LIBS=$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 |