autoconf: make the test for prctl have an effect

We currently test to ensure that prctl() is available, but the results
of that test are a no-op either way. statd calls prctl()
unconditionally, so make configure bail out if prctl() isn't available
since the build will fail in that event anyway.

Cc: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve Dickson <steved@redhat.com>

diff --git a/aclocal/libcap.m4 b/aclocal/libcap.m4
index 68a624c141725eaddcc6645d8d9bf65391281a7c..f8a0ed178cccbc0639b7ab02343d7054e4015faa 100644 (file)
--- a/aclocal/libcap.m4
+++ b/aclocal/libcap.m4
@@ -3,7 +3,7 @@ dnl
 AC_DEFUN([AC_LIBCAP], [
 
   dnl look for prctl
-  AC_CHECK_FUNC([prctl], , )
+  AC_CHECK_FUNC([prctl], , AC_MSG_ERROR([prctl syscall is not available]))
 
   AC_ARG_ENABLE([caps],
     [AS_HELP_STRING([--disable-caps], [Disable capabilities support])])