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 <jhrozek(a)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