From f047ca31114d5749386660d65b7166e82e82d058 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Markus=20M=C3=BCtzel?= <markus.muetzel@gmx.de>
Date: Sat, 5 Aug 2023 13:32:20 +0200
Subject: [PATCH] cmake: Check for Fortran compiler early on

---
 CMakeLists.txt      | 11 +++++++++++
 cmake/f_check.cmake |  7 +------
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 35077f3c2..f3cb0eed4 100644
--- a/CMakeLists.txt
+++ b/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")
 
diff --git a/cmake/f_check.cmake b/cmake/f_check.cmake
index df3a4858d..df9716cb7 100644
--- a/cmake/f_check.cmake
+++ b/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")