# HG changeset patch
# User Pádraig Brady <P@draigBrady.com>
# Date 1389718747 0
# Node ID 098e9f7b62e9c87132d3eb5181c059fd6e75d477
# Parent  4d899884c95c51f0ecf91c4f0bae80ca88675cee
spawn: fix link error on uclibc

* m4/spawn_h.m4 (gl_HAVE_POSIX_SPAWN): use AC_SEARCH_LIBS,
to incorporate -lrt if needed (on uclibc for example).
* modules/posix_spawn: Reference the substituted LIB.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2014-02-21  Pádraig Brady <P@draigBrady.com>
+
+	spawn: fix link error on uclibc
+	* m4/spawn_h.m4 (gl_HAVE_POSIX_SPAWN): use AC_SEARCH_LIBS,
+	to incorporate -lrt if needed (on uclibc for example).
+	* modules/posix_spawn: Reference the substituted LIB.
+
 2014-02-21  Thomas Petazzoni  <thomas.petazzoni@free-electrons.com>  (tiny change)
 	timer: fix uClibc detection of threading
 	* m4/time_time.m4 (gl_TIMER_TIME): Detect whether threads are
diff --git a/m4/spawn_h.m4 b/m4/spawn_h.m4
--- a/m4/spawn_h.m4
+++ b/m4/spawn_h.m4
@@ -64,7 +64,15 @@
   dnl once only, before all statements that occur in other macros.
   AC_REQUIRE([gl_SPAWN_H_DEFAULTS])
 
-  AC_CHECK_FUNCS_ONCE([posix_spawn])
+  LIB_POSIX_SPAWN=
+  AC_SUBST([LIB_POSIX_SPAWN])
+  gl_saved_libs=$LIBS
+    AC_SEARCH_LIBS([posix_spawn], [rt],
+                   [test "$ac_cv_search_posix_spawn" = "none required" ||
+                    LIB_POSIX_SPAWN=$ac_cv_search_posix_spawn])
+    AC_CHECK_FUNCS([posix_spawn])
+  LIBS=$gl_saved_libs
+
   if test $ac_cv_func_posix_spawn != yes; then
     HAVE_POSIX_SPAWN=0
   fi
diff --git a/modules/posix_spawn b/modules/posix_spawn
--- a/modules/posix_spawn
+++ b/modules/posix_spawn
@@ -23,6 +23,9 @@
 Include:
 <spawn.h>
 
+Link:
+$(LIB_POSIX_SPAWN)
+
 License:
 LGPLv2+