Re: [libvirt] [PATCH] fix rawhide/F13 --no-add-needed/dlopen-related build failures

Diego, I saw no follow-up here, http://thread.gmane.org/gmane.comp.emulators.libvirt/21398/focus=21671 so I've fixed your two patches to address Eric's review feedback, and confirmed that they solve the problem on Rawhide. >From 55c182d89cd6e5417eafe9f4bdf2e0ef7f8721f5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Diego=20Elio=20Petten=C3=B2?= <flameeyes(a)gmail.com&gt; Date: Thu, 4 Mar 2010 16:45:02 +0100 Subject: [PATCH 1/2] build: avoid dlopen-related link failure on rawhide/F13 Instead of using AC_CHECK_LIB and hardcoding -ldl, search for the library needed to get dlopen() and then use the cached value. --- configure.ac | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-) diff --git a/configure.ac b/configure.ac index 682b8b5..d5d62ea 100644 --- a/configure.ac +++ b/configure.ac @@ -1700,7 +1700,7 @@ if test "x$with_driver_modules" = "xyes" ; then old_libs="$LIBS" fail=0 AC_CHECK_HEADER([dlfcn.h],[],[fail=1]) - AC_CHECK_LIB([dl], [dlopen],[],[fail=1]) + AC_SEARCH_LIBS([dlopen], [dl], [], [fail=1]) test $fail = 1 && AC_MSG_ERROR([You must have dlfcn.h / dlopen() support to build driver modules]) @@ -1709,7 +1709,10 @@ if test "x$with_driver_modules" = "xyes" ; then fi if test "$with_driver_modules" = "yes"; then DRIVER_MODULE_CFLAGS="-export-dynamic" - DRIVER_MODULE_LIBS="-ldl" + case $ac_cv_search_dlopen in + no*) DRIVER_MODULE_LIBS= ;; + *) DRIVER_MODULE_LIBS=$ac_cv_search_dlopen ;; + esac AC_DEFINE_UNQUOTED([WITH_DRIVER_MODULES], 1, [whether to build drivers as modules]) fi AM_CONDITIONAL([WITH_DRIVER_MODULES], [test "$with_driver_modules" != "no"]) -- 1.7.0.1.475.gaf89b

>From ca7a9f299b0bd415f8434b3c9e6c70528d2f85cc Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Diego=20Elio=20Petten=C3=B2?= <flameeyes(a)gmail.com&gt; Date: Thu, 4 Mar 2010 16:48:10 +0100 Subject: [PATCH 2/2] build: vbox: avoid build failure when linking with --no-add-needed With the recent changes to the linking defaults in Fedora 13 (namely enabling --no-add-needed behaviour by default), we have to pass the dlopen()-providing libraries directly at the link of the module; use the same AC_SEARCH_LIBS function as used before to look for it and add it to the Makefile. --- configure.ac | 6 ++++++ src/Makefile.am | 1 + 2 files changed, 7 insertions(+), 0 deletions(-) diff --git a/configure.ac b/configure.ac index d5d62ea..923d7b8 100644 --- a/configure.ac +++ b/configure.ac @@ -303,6 +303,12 @@ fi AM_CONDITIONAL([WITH_OPENVZ], [test "$with_openvz" = "yes"]) if test "x$with_vbox" = "xyes"; then + AC_SEARCH_LIBS([dlopen], [dl], [], [AC_MSG_ERROR([Unable to find dlopen()])]) + case $ac_cv_search_dlopen in + no*) DLOPEN_LIBS= ;; + *) DLOPEN_LIBS=$ac_cv_search_dlopen ;; + esac + AC_SUBST([DLOPEN_LIBS]) AC_DEFINE_UNQUOTED([WITH_VBOX], 1, [whether VirtualBox driver is enabled]) fi AM_CONDITIONAL([WITH_VBOX], [test "$with_vbox" = "yes"]) diff --git a/src/Makefile.am b/src/Makefile.am index 2051e5d..67f8b6d 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -463,6 +463,7 @@ libvirt_driver_vbox_la_CFLAGS = \ if WITH_DRIVER_MODULES libvirt_driver_vbox_la_LDFLAGS = -module -avoid-version endif +libvirt_driver_vbox_la_LIBADD = $(DLOPEN_LIBS) libvirt_driver_vbox_la_SOURCES = $(VBOX_DRIVER_SOURCES) endif --