1 files changed, 57 insertions, 0 deletions
diff --git a/Modules/CMakeDetermineRCCompiler.cmake b/Modules/CMakeDetermineRCCompiler.cmake
new file mode 100644
index 0000000..8801e16
--- /dev/null
+++ b/Modules/CMakeDetermineRCCompiler.cmake
@@ -0,0 +1,57 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+
+# determine the compiler to use for RC programs
+# NOTE, a generator may set CMAKE_RC_COMPILER before
+# loading this file to force a compiler.
+# use environment variable RC first if defined by user, next use
+# the cmake variable CMAKE_GENERATOR_RC which can be defined by a generator
+# as a default compiler
+if(NOT CMAKE_RC_COMPILER)
+  # prefer the environment variable RC
+  if(NOT $ENV{RC} STREQUAL "")
+    get_filename_component(CMAKE_RC_COMPILER_INIT $ENV{RC} PROGRAM PROGRAM_ARGS CMAKE_RC_FLAGS_ENV_INIT)
+    if(CMAKE_RC_FLAGS_ENV_INIT)
+      set(CMAKE_RC_COMPILER_ARG1 "${CMAKE_RC_FLAGS_ENV_INIT}" CACHE STRING "First argument to RC compiler")
+    endif()
+    if(EXISTS ${CMAKE_RC_COMPILER_INIT})
+    else()
+      message(FATAL_ERROR "Could not find compiler set in environment variable RC:\n$ENV{RC}.")
+    endif()
+  endif()
+
+  # next try prefer the compiler specified by the generator
+  if(CMAKE_GENERATOR_RC)
+    if(NOT CMAKE_RC_COMPILER_INIT)
+      set(CMAKE_RC_COMPILER_INIT ${CMAKE_GENERATOR_RC})
+    endif()
+  endif()
+
+  # finally list compilers to try
+  if(CMAKE_RC_COMPILER_INIT)
+    set(CMAKE_RC_COMPILER_LIST ${CMAKE_RC_COMPILER_INIT})
+  else()
+    set(CMAKE_RC_COMPILER_LIST rc)
+  endif()
+
+  # Find the compiler.
+  find_program(CMAKE_RC_COMPILER NAMES ${CMAKE_RC_COMPILER_LIST} DOC "RC compiler")
+  if(CMAKE_RC_COMPILER_INIT AND NOT CMAKE_RC_COMPILER)
+    set(CMAKE_RC_COMPILER "${CMAKE_RC_COMPILER_INIT}" CACHE FILEPATH "RC compiler" FORCE)
+  endif()
+endif()
+
+mark_as_advanced(CMAKE_RC_COMPILER)
+
+get_filename_component(_CMAKE_RC_COMPILER_NAME_WE ${CMAKE_RC_COMPILER} NAME_WE)
+if(_CMAKE_RC_COMPILER_NAME_WE STREQUAL "windres")
+  set(CMAKE_RC_OUTPUT_EXTENSION .obj)
+else()
+  set(CMAKE_RC_OUTPUT_EXTENSION .res)
+endif()
+
+# configure variables set in this file for fast reload later on
+configure_file(${CMAKE_ROOT}/Modules/CMakeRCCompiler.cmake.in
+               ${CMAKE_PLATFORM_INFO_DIR}/CMakeRCCompiler.cmake)
+set(CMAKE_RC_COMPILER_ENV_VAR "RC")