From 9888cac80e003597a1e79188cd1dd81152fece04 Mon Sep 17 00:00:00 2001
From: Kefu Chai <kchai@redhat.com>
Date: Mon, 9 Jul 2018 17:13:21 +0800
Subject: [PATCH] cmake: cleanup FindCython.cmake

print out error message if cython module is not found.

Signed-off-by: Kefu Chai <kchai@redhat.com>
---
 cmake/modules/FindCython.cmake | 30 ++++++++++--------------------
 1 file changed, 10 insertions(+), 20 deletions(-)

diff --git a/cmake/modules/FindCython.cmake b/cmake/modules/FindCython.cmake
index 0048bf7f9bd..6017a398081 100644
--- a/cmake/modules/FindCython.cmake
+++ b/cmake/modules/FindCython.cmake
@@ -2,25 +2,15 @@
 # Cython
 #
 
-SET(Cython${PYTHON_VERSION}_FOUND FALSE)
 # Try to run Cython, to make sure it works:
 execute_process(
-    COMMAND ${PYTHON${PYTHON_VERSION}_EXECUTABLE} -m cython --version
-    RESULT_VARIABLE CYTHON_RESULT
-    OUTPUT_QUIET
-    ERROR_QUIET
-    )
-if (CYTHON_RESULT EQUAL 0)
-    SET(Cython${PYTHON_VERSION}_FOUND TRUE)
-endif (CYTHON_RESULT EQUAL 0)
-
-
-IF (Cython${PYTHON_VERSION}_FOUND)
-    IF (NOT Cython_FIND_QUIETLY)
-        MESSAGE(STATUS "Found cython${PYTHON_VERSION}")
-    ENDIF (NOT Cython_FIND_QUIETLY)
-ELSE (Cython${PYTHON_VERSION}_FOUND)
-    IF (Cython_FIND_REQUIRED)
-        MESSAGE(FATAL_ERROR "Could not find cython${PYTHON_VERSION}. Please install Cython.")
-    ENDIF (Cython_FIND_REQUIRED)
-ENDIF (Cython${PYTHON_VERSION}_FOUND)
+  COMMAND ${PYTHON${PYTHON_VERSION}_EXECUTABLE} -m cython --version
+  RESULT_VARIABLE cython_result
+  ERROR_VARIABLE cython_output)
+if(cython_result EQUAL 0)
+  string(REGEX REPLACE "^Cython version ([0-9]+\\.[0-9]+).*" "\\1" CYTHON_VERSION "${cython_output}")
+else()
+  message(SEND_ERROR "Could not find cython${PYTHON_VERSION}: ${cython_output}")
+endif()
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Cython${PYTHON_VERSION} DEFAULT_MSG CYTHON_VERSION)
-- 
2.47.3