On (19/04/13 21:24), Lukas Slebodnik wrote: >On (19/04/13 11:30), Jakub Hrozek wrote: >>Timo Aaltonen discovered that on Ubuntu the simple access tests fail >>with a linker error saying that dlopen and dlsym are not available. It >>seems that because we are linking to some files from >>src/providers/data_provider_*.c we need to also link with -ldl. >> >>Timo confirmed on IRC that this one-liner fixes the problem for him. > >>From a58c950b21056925f8a5ae46a6bb6ad5a951ef11 Mon Sep 17 00:00:00 2001 >>From: Jakub Hrozek <jhro...@redhat.com> >>Date: Fri, 19 Apr 2013 11:27:59 +0200 >>Subject: [PATCH] tests: Link the simple access tests with -ldl >> >>--- >> Makefile.am | 1 + >> 1 file changed, 1 insertion(+) >> >>diff --git a/Makefile.am b/Makefile.am >>index >>09056b5d9fec1d23213132940d11c312bcbfc23d..ef1802246226bd08826f028a784d80289b723d81 >> 100644 >>--- a/Makefile.am >>+++ b/Makefile.am >>@@ -1058,6 +1058,7 @@ simple_access_tests_CFLAGS = \ >> $(CHECK_CFLAGS) \ >> -DUNIT_TESTING >> simple_access_tests_LDADD = \ >>+ -ldl \ >> $(SSSD_LIBS) \ >> $(CARES_LIBS) \ >> $(CHECK_LIBS) \ >>-- >>1.8.1.4 > >Ack, >but add comment to git message, that upstream nspr 4.9 >(http://www.mozilla.org/projects/nspr/) >removed -ldl and -lpthread from pkg-config file. > >BTW: sssd depends on nss and nss depends on nspr. > >LS
After reading this mail once more time. I find out, that my explanations was very briefly and maybe unintelligible. In SSSD, we use functions dlopen and dlsym in two files src/providers/data_provider_be.c and src/providers/proxy/proxy_init.c. This is reason why we should explicitly link with -ldl also in simple_access-tests. SSSD can be compiled with two crypto libraries nss(mozilla) or libcrypto(openssl). NSS has dependency nspr which depends on "libdl and libpthread" This is a reason why compilation of test did not failed even if -ldl was not explicitly added to simple_access_tests_LDADD. But libcrypto doesn't depend on libdl, so in this case compilation of tests will not be successful. Upstream nspr 4.9 has two ways have to obtain metainformation about libraries pkg-config and own script nspr-config. First one doesn't show "-ldl and -lpthread" but second one show "-ldl and -lpthread" And this is a reason why Timo found this bug. Fedora has got patched version of nspr, but debian(ubuntu) hasn't got. LS _______________________________________________ sssd-devel mailing list sssd-devel@lists.fedorahosted.org https://lists.fedorahosted.org/mailman/listinfo/sssd-devel
