From a847d0036656533745b9a224f58785497d5f02b6 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Thu, 16 Jul 2020 22:17:39 +0000
Subject: [PATCH] handle missing lack of fortran compiler more gracefully

---
 cmake/f_check.cmake | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/cmake/f_check.cmake b/cmake/f_check.cmake
index f877fc3e..1fd6c2ad 100644
--- a/cmake/f_check.cmake
+++ b/cmake/f_check.cmake
@@ -21,7 +21,14 @@
 # NEED2UNDERSCORES
 
 if (NOT NO_LAPACK)
-  enable_language(Fortran)
+  check_language(Fortran)
+  if(CMAKE_Fortran_COMPILER)
+    enable_language(Fortran)
+  else()
+  message(STATUS "No Fortran compiler found, can build only BLAS but not LAPACK")
+  set (NOFORTRAN 1)
+  set (NO_LAPACK 1)
+  endif()
 else()
   include(CMakeForceCompiler)
   CMAKE_FORCE_Fortran_COMPILER(gfortran GNU)
-- 
2.34.1