IntelLLVM: Add support for Intel LLVM-based compilers

Using a single ID 'IntelLLVM' for the suite of Intel compilers based on
the LLVM backend.  The 'IntelLLVM' ID are used for C, C++, and Fortran.
Data Parallel C++ will be handled in a separate commit.

The C and C++ definitions are based on the Clang definitions.  The Intel
LLVM-based C and C++ compilers are based on the Clang front end, so
existing Clang options are more likely to be a good match than options
for the older Intel compilers.

Fortran is based on the older Fortran front end with the LLVM backend.
It has a similar interface to the older versions, though many options
are shared with the C and C++ compilers.

Fixes: #21561
Signed-off-by: William R. Dieter <william.r.dieter@intel.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/Modules/Platform/Apple-IntelLLVM-Fortran.cmake b/Modules/Platform/Apple-IntelLLVM-Fortran.cmake
new file mode 100644
index 0000000..d0486ed
--- /dev/null
+++ b/Modules/Platform/Apple-IntelLLVM-Fortran.cmake
@@ -0,0 +1,8 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+include(Platform/Apple-IntelLLVM)
+__apple_compiler_intel_llvm(Fortran)
+
+set(CMAKE_Fortran_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ")
+set(CMAKE_Fortran_OSX_CURRENT_VERSION_FLAG "-current_version ")