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| author | Michal Schmidt <mschmidt@redhat.com> | 2015-10-13 16:52:53 +0200 |
|---|---|---|
| committer | Michal Schmidt <mschmidt@redhat.com> | 2015-10-14 14:43:38 +0200 |
| commit | 7f7bfcf3cfc6f0d9fabffb63a44b607a7a040d57 (patch) | |
| tree | 4861a8bdac0d32edc67b570e355f907bf1a8b19f /configure.ac | |
| parent | c7e2496a2194557c8c52317209d1020dee845117 (diff) | |
| download | systemd-7f7bfcf3cfc6f0d9fabffb63a44b607a7a040d57.tar.gz | |
build: fix overlinking to libdw
We have two AC_CHECK_LIB checks for libdw. The first one has an empty
action-if-found, so it defaults to adding "-ldw" to LIBS. LIBS are
applied to everything we build. But only systemd-coredump needs libdw.
It already links to ELFUTILS_LIBS correctly in Makefile.am.
Drop the first AC_CHECK_LIB check. The second check is sufficient.
Q: Don't we already use "-Wl,--as-needed" to eliminate overlinking?
A: We do, but it is effective only for executables, not for shared
libraries. This is due to a libtool bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=347650
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/configure.ac b/configure.ac index c658c7fca3..8f273c6990 100644 --- a/configure.ac +++ b/configure.ac @@ -790,14 +790,6 @@ if test "x${have_elfutils}" != xno ; then AC_CHECK_LIB( [dw], - [dwfl_begin], - [], - [if test "x$have_elfutils" = xyes ; then - AC_MSG_ERROR([*** ELFUTILS libs not found.]) - fi]) - - AC_CHECK_LIB( - [dw], [dwfl_core_file_attach], [have_elfutils=yes], [if test "x$have_elfutils" = xyes ; then |