[13/13] build: resolve link failure for ip6t_NETMAP

Message ID 1356477089-13241-14-git-send-email-jengelh@inai.de
State Superseded
Headers show

Commit Message

Jan Engelhardt Dec. 25, 2012, 11:11 p.m.
Link stage of libip6t_NETMAP failed since recently.

  CCLD     libip6t_NETMAP.so
cannot find -lip6tc

libip6t_NETMAP.c uses the "ipv6_prefix_length" function from
libip6tc.so; "-lip6tc" is used in the Makefile, but, the directory to
it is not specified.

Why does the link succeed for some people? Because
/usr/lib(64)/libip6tc.so satisfies -lip6tc, but not all environments,
especially those without iptables development files, have that file,
hence this link error can happen.

Signed-off-by: Jan Engelhardt <jengelh@inai.de>
 extensions/GNUmakefile.in |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


diff --git a/extensions/GNUmakefile.in b/extensions/GNUmakefile.in
index e71e3ff..68e0b9b 100644
--- a/extensions/GNUmakefile.in
+++ b/extensions/GNUmakefile.in
@@ -101,7 +101,8 @@  libxt_state.so: libxt_conntrack.so
 	ln -fs $< $@
 # Need the LIBADDs in iptables/Makefile.am too for libxtables_la_LIBADD
-ip6t_NETMAP_LIBADD  = -lip6tc
+ip6t_NETMAP_LIBADD  = -L${top_builddir}/libiptc/.libs \
+                      -L${top_builddir}/libiptc -lip6tc
 xt_RATEEST_LIBADD   = -lm
 xt_statistic_LIBADD = -lm