cmake: Check Fortran compiler earlier in configuration.

Author: mmuetzel

CMakeLists.txt

@@ -93,6 +93,17 @@ endif()
 
 message(WARNING "CMake support is experimental. It does not yet support all build options and may not produce the same Makefiles that OpenBLAS ships with.")
 
+if(NOT NOFORTRAN)
+  # Check for working Fortran compiler
+  include(CheckLanguage)
+  check_language(Fortran)
+  if(CMAKE_Fortran_COMPILER)
+    enable_language(Fortran)
+  else()
+    set (NOFORTRAN 1)
+  endif()
+endif()
+
 include("${PROJECT_SOURCE_DIR}/cmake/utils.cmake")
 include("${PROJECT_SOURCE_DIR}/cmake/system.cmake")
 

cmake/f_check.cmake

@@ -20,12 +20,7 @@
 # NEEDBUNDERSCORE
 # NEED2UNDERSCORES
 
-include(CheckLanguage)
-check_language(Fortran)
-if(CMAKE_Fortran_COMPILER)
-  enable_language(Fortran)
-else()
-  set (NOFORTRAN 1)
+if(NOT CMAKE_Fortran_COMPILER)
   if (NOT NO_LAPACK)
      if (NOT XXXXX)
 	message(STATUS "No Fortran compiler found, can build only BLAS and f2c-converted LAPACK")