From 6df18dd59319fef4b8a8f4d33225aa96391575a4 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Sat, 21 Dec 2024 22:50:26 +0100
Subject: [PATCH] The Windows version of Intel ifx does not add trailing
 underlines to symbols

---
 cmake/f_check.cmake | 144 +++++++++++++++++++++++---------------------
 1 file changed, 74 insertions(+), 70 deletions(-)

diff --git a/cmake/f_check.cmake b/cmake/f_check.cmake
index 4c4f5ac04..f64277d71 100644
--- a/cmake/f_check.cmake
+++ b/cmake/f_check.cmake
@@ -1,70 +1,74 @@
-##
-## Author: Hank Anderson <hank@statease.com>
-## Copyright: (c) Stat-Ease, Inc.
-## Created: 12/29/14
-## Last Modified: 12/29/14
-## Description: Ported from the OpenBLAS/f_check perl script.
-##              This is triggered by prebuild.cmake and runs before any of the code is built.
-##              Appends Fortran information to config.h and Makefile.conf.
-
-# CMake vars set by this file:
-# F_COMPILER
-# FC
-# BU
-# NOFORTRAN
-# NEED2UNDERSCORES
-# FEXTRALIB
-
-# Defines set by this file:
-# BUNDERSCORE
-# NEEDBUNDERSCORE
-# NEED2UNDERSCORES
-
-include(CheckLanguage)
-check_language(Fortran)
-if(CMAKE_Fortran_COMPILER)
-  enable_language(Fortran)
-else()
-  set (NOFORTRAN 1)
-  if (NOT NO_LAPACK)
-     if (NOT XXXXX)
-	message(STATUS "No Fortran compiler found, can build only BLAS and f2c-converted LAPACK")
-	set(C_LAPACK 1)
-	if (INTERFACE64)
-	  set (CCOMMON_OPT "${CCOMMON_OPT} -DLAPACK_ILP64")
-  	endif ()
-	set(TIMER "NONE")
-     else ()
-       message(STATUS "No Fortran compiler found, can build only BLAS")
-     endif()  
-  endif()
-endif()
-
-if (NOT ONLY_CBLAS)
-  # run f_check (appends to TARGET files)
-
-  # TODO: detect whether underscore needed, set #defines and BU appropriately - use try_compile
-  # TODO: set FEXTRALIB flags a la f_check?
-
-  set(BU "_")
-  file(APPEND ${TARGET_CONF_TEMP}
-    "#define BUNDERSCORE _\n"
-    "#define NEEDBUNDERSCORE 1\n"
-    "#define NEED2UNDERSCORES 0\n")
-
-else ()
-
-  #When we only build CBLAS, we set NOFORTRAN=2
-  set(NOFORTRAN 2)
-  set(NO_FBLAS 1)
-  #set(F_COMPILER GFORTRAN) # CMake handles the fortran compiler
-  set(BU "_")
-  file(APPEND ${TARGET_CONF_TEMP}
-    "#define BUNDERSCORE _\n"
-    "#define NEEDBUNDERSCORE 1\n")
-endif()
-
-if (CMAKE_Fortran_COMPILER)
-get_filename_component(F_COMPILER ${CMAKE_Fortran_COMPILER} NAME_WE)
-string(TOUPPER ${F_COMPILER} F_COMPILER)
-endif()
+##
+## Author: Hank Anderson <hank@statease.com>
+## Copyright: (c) Stat-Ease, Inc.
+## Created: 12/29/14
+## Last Modified: 12/29/14
+## Description: Ported from the OpenBLAS/f_check perl script.
+##              This is triggered by prebuild.cmake and runs before any of the code is built.
+##              Appends Fortran information to config.h and Makefile.conf.
+
+# CMake vars set by this file:
+# F_COMPILER
+# FC
+# BU
+# NOFORTRAN
+# NEED2UNDERSCORES
+# FEXTRALIB
+
+# Defines set by this file:
+# BUNDERSCORE
+# NEEDBUNDERSCORE
+# NEED2UNDERSCORES
+
+include(CheckLanguage)
+check_language(Fortran)
+if(CMAKE_Fortran_COMPILER)
+  enable_language(Fortran)
+else()
+  set (NOFORTRAN 1)
+  if (NOT NO_LAPACK)
+     if (NOT XXXXX)
+	message(STATUS "No Fortran compiler found, can build only BLAS and f2c-converted LAPACK")
+	set(C_LAPACK 1)
+	if (INTERFACE64)
+	  set (CCOMMON_OPT "${CCOMMON_OPT} -DLAPACK_ILP64")
+  	endif ()
+	set(TIMER "NONE")
+     else ()
+       message(STATUS "No Fortran compiler found, can build only BLAS")
+     endif()  
+  endif()
+endif()
+
+if (NOT ONLY_CBLAS)
+  # run f_check (appends to TARGET files)
+
+  # TODO: detect whether underscore needed, set #defines and BU appropriately - use try_compile
+  # TODO: set FEXTRALIB flags a la f_check?
+  if (NOT (${CMAKE_SYSTEM_NAME} MATCHES "Windows" AND ${CMAKE_Fortran_COMPILER_ID} MATCHES "IntelLLVM"))
+  set(BU "_")
+  file(APPEND ${TARGET_CONF_TEMP}
+    "#define BUNDERSCORE _\n"
+    "#define NEEDBUNDERSCORE 1\n"
+    "#define NEED2UNDERSCORES 0\n")
+  else ()
+  file(APPEND ${TARGET_CONF_TEMP}
+    "#define NEEDBUNDERSCORE 0\n"
+    "#define NEED2UNDERSCORES 0\n")
+  endif()
+else ()
+
+  #When we only build CBLAS, we set NOFORTRAN=2
+  set(NOFORTRAN 2)
+  set(NO_FBLAS 1)
+  #set(F_COMPILER GFORTRAN) # CMake handles the fortran compiler
+  set(BU "_")
+  file(APPEND ${TARGET_CONF_TEMP}
+    "#define BUNDERSCORE _\n"
+    "#define NEEDBUNDERSCORE 1\n")
+endif()
+
+if (CMAKE_Fortran_COMPILER)
+get_filename_component(F_COMPILER ${CMAKE_Fortran_COMPILER} NAME_WE)
+string(TOUPPER ${F_COMPILER} F_COMPILER)
+endif()