[Xcb] [PATCH xcb-util-common-m4] Introduce XCB_UTIL_COMMON_LDFLAGS and set it to -no-undefined

[Jon TURNEY]

Add XCB_UTIL_COMMON_LDFLAGS variable, a common set of linker flags
for all xcb-util libraries

Add -no-undefined to the value of XCB_UTIL_COMMON_LDFLAGS

-no-undefined assures libtool that the library has no unresolved
symbols at link time, so that libtool will build a shared library for
platforms that require all symbols to be resolved when the library is linked.

Signed-off-by: Jon TURNEY <jon.turney at dronecode.org.uk>
---
 xcb_util_common.m4 |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/xcb_util_common.m4 b/xcb_util_common.m4
index f9463d3..7112352 100644
--- a/xcb_util_common.m4
+++ b/xcb_util_common.m4
@@ -17,6 +17,10 @@ AC_SUBST(xcbincludedir)
 pkgconfigdir='${libdir}/pkgconfig'
 AC_SUBST(pkgconfigdir)
 
+# Define common linker flags
+XCB_UTIL_COMMON_LDFLAGS='-no-undefined'
+AC_SUBST(XCB_UTIL_COMMON_LDFLAGS)
+
 # Check xcb version
 PKG_CHECK_MODULES(XCB, xcb >= [$1])
 
-- 
1.7.4