don't forget to define HAVE_BACKTRACE

[sliver-openvswitch.git] / m4 / openvswitch.m4

diff --git a/m4/openvswitch.m4 b/m4/openvswitch.m4
index 1236853..12c02c0 100644 (file)
--- a/m4/openvswitch.m4
+++ b/m4/openvswitch.m4
@@ -167,10 +167,11 @@ AC_DEFUN([OVS_CHECK_DBDIR],
      [DBDIR='${sysconfdir}/${PACKAGE}'])
    AC_SUBST([DBDIR])])
 
-dnl Defines HAVE_BACKTRACE if backtrace() is declared in <execinfo.h>
-dnl and exists in libc.
+dnl Defines HAVE_BACKTRACE if backtrace() is found.
 AC_DEFUN([OVS_CHECK_BACKTRACE],
-  [AC_CHECK_HEADER([execinfo.h], [AC_CHECK_FUNCS([backtrace])])])
+  [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
+                  [AC_DEFINE([HAVE_BACKTRACE], [1],
+                             [Define to 1 if you have backtrace(3).])])])
 
 dnl Checks for __malloc_hook, etc., supported by glibc.
 AC_DEFUN([OVS_CHECK_MALLOC_HOOKS],