From 389bade377e6e7335304636ea1ebd0a81b0c235e Mon Sep 17 00:00:00 2001
From: Gustavo Zacarias <gustavo@zacarias.com.ar>
Date: Tue, 10 Dec 2013 09:11:00 -0300
Subject: [PATCH ulogd] ulogd: use AC_SEARCH_LIBS for libpthread

Some uClibc-based toolchains lack threading support, so use
AC_SEARCH_LIB instead of AC_CHECK_LIB to check for libpthread
availability and link conditionally if found since it's only used for
the database backends.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
---
 configure.ac    | 3 ++-
 src/Makefile.am | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 7f5ffa9..5e45aaa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,7 +39,8 @@ AC_CHECK_FUNCS(socket strerror)
 regular_CFLAGS="-Wall -Wextra -Wno-unused-parameter"
 AC_SUBST([regular_CFLAGS])
 
-AC_CHECK_LIB(pthread, pthread_create)
+AC_SEARCH_LIBS([pthread_create], [pthread], [libpthread_LIBS="$LIBS"; LIBS=""])
+AC_SUBST([libpthread_LIBS])
 
 dnl Check for the right nfnetlink version
 PKG_CHECK_MODULES([LIBNFNETLINK], [libnfnetlink >= 1.0.1])
diff --git a/src/Makefile.am b/src/Makefile.am
index 1097468..998e776 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -7,5 +7,5 @@ AM_CFLAGS = ${regular_CFLAGS}
 sbin_PROGRAMS = ulogd
 
 ulogd_SOURCES = ulogd.c select.c timer.c rbtree.c conffile.c hash.c addr.c
-ulogd_LDADD   = ${libdl_LIBS}
-ulogd_LDFLAGS = -export-dynamic -lpthread
+ulogd_LDADD   = ${libdl_LIBS} ${libpthread_LIBS}
+ulogd_LDFLAGS = -export-dynamic
-- 
1.8.3.2