Initial support of flang

Author: thelfer

cmake/modules/clang.cmake

@@ -42,7 +42,9 @@ endif(CMAKE_BUILD_TYPE STREQUAL "Debug")
 
 if(HAVE_FORTRAN)
   # we associate clang with the gnu fortran compiler
-  if("${CMAKE_Fortran_COMPILER_ID}" STREQUAL "IntelLLVM")
+  if("${CMAKE_Fortran_COMPILER_ID}" STREQUAL "LLVMFlang")
+    set(LLVM_FORTRAN_COMPILER ON)
+  elseif("${CMAKE_Fortran_COMPILER_ID}" STREQUAL "IntelLLVM")
     set(INTEL_FORTRAN_COMPILER ON)
   else()
     include(cmake/modules/gnu-fortran-compiler.cmake)

cmake/modules/compiler.cmake

@@ -187,4 +187,3 @@ if(NOT USE_EXTERNAL_COMPILER_FLAGS)
     endif(NOT enable-portable-build)
   endif(CMAKE_BUILD_TYPE STREQUAL "Profiling")
 endif(NOT USE_EXTERNAL_COMPILER_FLAGS)
-