Send locking assertion backtraces to stderr. Improve the heading on the backtrace.

[free-sw/xcb/libxcb] / configure.ac

diff --git a/configure.ac b/configure.ac
index d73e51f..b446e7f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -48,6 +48,8 @@ PKG_CHECK_MODULES(XDMCP, xdmcp,
                ], [$XDMCP_LIBS]),
        [AC_MSG_RESULT(no)])
 
+AC_CHECK_HEADER([execinfo.h], [AC_DEFINE(HAVE_BACKTRACE,1,[Has backtrace*() needed for retrieving stack traces])])
+
 AC_SUBST(NEEDED)
 
 # Find the xcb-proto protocol descriptions