Merge pull request #325 from Crydsch/fix_check_vulkan_version

Fix vulkan version parsing

cmake/check_vulkan_version.cmake

@@ -11,7 +11,7 @@ function(check_vulkan_version)
             file(STRINGS ${VULKAN_CORE_H} VULKAN_HEADER_VERSION_LINE REGEX "^#define VK_HEADER_VERSION ")
             string(REGEX MATCHALL "[0-9]+" VULKAN_HEADER_VERSION "${VULKAN_HEADER_VERSION_LINE}")
             file(STRINGS ${VULKAN_CORE_H} VULKAN_HEADER_VERSION_LINE2 REGEX "^#define VK_HEADER_VERSION_COMPLETE ")
-            if(${VULKAN_HEADER_VERSION_LINE2})
+            if(NOT ${VULKAN_HEADER_VERSION_LINE2} STREQUAL "")
                 string(REGEX MATCHALL "[0-9]+" VULKAN_HEADER_VERSION2 "${VULKAN_HEADER_VERSION_LINE2}")
                 list(LENGTH VULKAN_HEADER_VERSION2 _len)
                 # Versions >= 1.2.175 have an additional numbers in front of e.g. '0, 1, 2' instead of '1, 2'
@@ -71,7 +71,7 @@ function(check_vulkan_version)
         message(FATAL_ERROR "No GPU supporting Vulkan found in vulkaninfo. Does your GPU (driver) support Vulkan?")
     endif()
 
-    string(REGEX MATCHALL "apiVersion[ ]*=[ ]*[0-9a-fA-F]+[ ]+[(]([0-9]+[.][0-9]+[.][0-9]+)[)]" GPU_API_VERSIONS ${VULKAN_INFO_OUTPUT})
+    string(REGEX MATCHALL "apiVersion[ ]*=[ ]*[0-9a-fA-F]*[ ]*[(]*([0-9]+[.][0-9]+[.][0-9]+)[)]*" GPU_API_VERSIONS ${VULKAN_INFO_OUTPUT})
     if(NOT GPU_API_VERSIONS)
         message(FATAL_ERROR "No valid Vulkan API version found in vulkaninfo. Does your GPU (driver) support Vulkan?")
     endif()
@@ -93,7 +93,7 @@ function(check_vulkan_version)
         list(GET GPU_API_VERSIONS ${INDEX} API_VERSION)
 
         # Extract API version
-        if(${API_VERSION} MATCHES "apiVersion[ ]*=[ ]*[0-9a-fA-F]+[ ]+[(]([0-9]+[.][0-9]+[.][0-9]+)[)]")
+        if(${API_VERSION} MATCHES "apiVersion[ ]*=[ ]*[0-9a-fA-F]*[ ]*[(]*([0-9]+[.][0-9]+[.][0-9]+)[)]*")
             set(VULKAN_DRIVER_VERSION ${CMAKE_MATCH_1})
         else()
             message(FATAL_ERROR "API version match failed. This should not have happened...")