build-sys: add -pthread flag for libsystemd-shared

src/shared/async.c uses pthread so it will fail at link time if we link
only to libsystemd-shared and use async

diff --git a/Makefile.am b/Makefile.am
index c7653ea23c212942503b603fcfbed0f309298aee..00db82dbb75119af6bd127004c3ff5406d52b092 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -837,7 +837,8 @@ nodist_libsystemd_shared_la_SOURCES = \
 
 libsystemd_shared_la_CFLAGS = \
        $(AM_CFLAGS) \
-       $(SECCOMP_CFLAGS)
+       $(SECCOMP_CFLAGS) \
+       -pthread
 
 # ------------------------------------------------------------------------------
 noinst_LTLIBRARIES += \