================
@@ -0,0 +1,210 @@
+#===-- CMakeLists.txt
------------------------------------------------------===#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+#===------------------------------------------------------------------------===#
+#
+# Build instructions for the flang-rt library. This is file is intended to be
+# included using the LLVM_ENABLE_RUNTIMES mechanism.
+#
+#===------------------------------------------------------------------------===#
+
+set(LLVM_SUBPROJECT_TITLE "Fortran Runtime")
+set(FLANG_RT_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+set(FLANG_RT_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}")
+set(FLANG_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../flang")
+
+
+# CMake 3.24 is the first version of CMake that directly recognizes Flang.
+# LLVM's requirement is only CMake 3.20, teach CMake 3.20-3.23 how to use
Flang.
+if (CMAKE_VERSION VERSION_LESS "3.24")
+ cmake_path(GET CMAKE_Fortran_COMPILER STEM _Fortran_COMPILER_STEM)
+ if (_Fortran_COMPILER_STEM STREQUAL "flang-new" OR _Fortran_COMPILER_STEM
STREQUAL "flang")
+ include(CMakeForceCompiler)
+ CMAKE_FORCE_Fortran_COMPILER("${CMAKE_Fortran_COMPILER}" "LLVMFlang")
+
+ set(CMAKE_Fortran_COMPILER_ID "LLVMFlang")
+ set(CMAKE_Fortran_COMPILER_VERSION "20.0")
----------------
Meinersbur wrote:
CMake starting with version 3.24 does so automatically, but the minimum
required CMake version is only 2.20. This is a workaround. Nothing depends on
which actual version of flang, so the version specified here should not matter.
I am going to replace it with "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}". I
checked it is available in runtimes-only and bootstrap builds. It is assumed
that one is using matching version of Flang anyway.
https://github.com/llvm/llvm-project/pull/110217
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