From 61bc9e3e5683883047ebda0bc87d576ded75782f Mon Sep 17 00:00:00 2001
From: reyoung <reyoung@linux.laptop>
Date: Thu, 30 Mar 2017 13:49:15 +0800
Subject: [PATCH] Get Fortran version correctly

---
 cmake/external/openblas.cmake | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/cmake/external/openblas.cmake b/cmake/external/openblas.cmake
index 62ad2bbc23b..a11d18617bf 100644
--- a/cmake/external/openblas.cmake
+++ b/cmake/external/openblas.cmake
@@ -30,8 +30,9 @@ IF(NOT ${CBLAS_FOUND})
     IF(CMAKE_COMPILER_IS_GNUCC)
         ENABLE_LANGUAGE(Fortran)
         if (NOT CMAKE_Fortran_COMPILER_VERSION)
-          # cmake version is too old, we cannot get fortran version, using CXX version instead.
-          set(CMAKE_Fortran_COMPILER_VERSION ${CMAKE_CXX_COMPILER_VERSION})
+          # cmake < 3.4 cannot get CMAKE_Fortran_COMPILER_VERSION directly.
+          execute_process(COMMAND ${CMAKE_Fortran_COMPILER} -dumpversion
+                    OUTPUT_VARIABLE CMAKE_Fortran_COMPILER_VERSION)
         endif()
         string(REGEX MATCHALL "[0-9]+" Fortran_VERSION ${CMAKE_Fortran_COMPILER_VERSION})
         list(GET Fortran_VERSION 0 Fortran_MAJOR)
-- 
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