From c8603e6d3673f06f84dc2b0ff0f96ede4ad881a8 Mon Sep 17 00:00:00 2001
From: Ryan Lortie <desrt@desrt.ca>
Date: Sun, 8 Dec 2013 12:58:49 -0500
Subject: portability: only link to -ldl if needed

We use -ldl in some of our testcases to mock out some system calls via
interposing, using dlsym() to chain up.

Make sure we only use this if we really need to.  Many systems have
dlsym() in the C library and no -ldl.

https://bugzilla.gnome.org/show_bug.cgi?id=720072
---
 configure.ac      | 2 ++
 tests/Makefile.am | 5 +++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 87356b6..f99e903 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,6 +18,8 @@ fi
 
 # Check for programs
 AC_PROG_CC
+AC_CHECK_LIB(c, dlsym, LIBDL="", [AC_CHECK_LIB(dl, dlsym, LIBDL="-ldl")])
+AC_SUBST(LIBDL)
 AM_PROG_VALAC([0.17.0])
 AC_PROG_RANLIB
 AC_ARG_ENABLE(man,
diff --git a/tests/Makefile.am b/tests/Makefile.am
index fc77755..adc8519 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -29,7 +29,7 @@ shm_CFLAGS = $(glib_CFLAGS)
 shm_LDADD = \
 	../shm/libdconf-shm.a			\
 	$(glib_LIBS)				\
-	-ldl
+	$(LIBDL)
 shm_SOURCES = \
 	shm.c					\
 	tmpdir.h				\
@@ -79,7 +79,8 @@ engine_LDADD = \
 	../common/libdconf-common.a		\
 	libdconf-mock.a				\
 	$(glib_LIBS)				\
-	-ldl -lm
+	$(LIBDL)				\
+	-lm
 engine_SOURCES = engine.c
 EXTRA_DIST += \
 	profile/broken-profile			\
-- 
cgit v1.2.1