From 3e9811d91cf0c4e1101b1eed913c950819ad55fd Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Fri, 9 Dec 2016 21:17:27 +0100
Subject: [PATCH] build: Don't try to detect vulkan library if the header
 wasn't found.

We've already failed. No need to fail again.
---
 configure.ac | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index b0d37674bf..59886962f3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1323,8 +1323,9 @@ fi
 
 if test "x$enable_vulkan" != "xno"; then
       vulkan_error=""
-      AC_CHECK_HEADER([vulkan/vulkan.h], [], [vulkan_error="Vulkan header not found"])
-      AC_CHECK_LIB([vulkan], [vkCreateInstance], [], [vulkan_error="Vulkan library not found"])
+      AC_CHECK_HEADER([vulkan/vulkan.h],
+          [AC_CHECK_LIB([vulkan], [vkCreateInstance], [], [vulkan_error="Vulkan library not found"])],
+          [vulkan_error="Vulkan header not found"])
       if test "x$vulkan_error" != "x"; then
           if "x$enable_vulkan" = "xyes"; then
               AC_MSG_ERROR($vulkan_error)