C# support: add compiler detection for MSVC

1 files changed, 68 insertions, 0 deletions

diff --git a/Modules/CMakeTestCSharpCompiler.cmake b/Modules/CMakeTestCSharpCompiler.cmake
new file mode 100644
index 0000000..21b7236
--- /dev/null
+++ b/Modules/CMakeTestCSharpCompiler.cmake
@@ -0,0 +1,68 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+if(CMAKE_CSharp_COMPILER_FORCED)
+  # The compiler configuration was forced by the user.
+  # Assume the user has configured all compiler information.
+  set(CMAKE_CSharp_COMPILER_WORKS TRUE)
+  return()
+endif()
+
+include(CMakeTestCompilerCommon)
+
+unset(CMAKE_CSharp_COMPILER_WORKS CACHE)
+
+set(test_compile_file "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCSharpCompiler.cs")
+
+# This file is used by EnableLanguage in cmGlobalGenerator to
+# determine that that selected C# compiler can actually compile
+# and link the most basic of programs. If not, a fatal error
+# is set and cmake stops processing commands and will not generate
+# any makefiles or projects.
+if(NOT CMAKE_CSharp_COMPILER_WORKS)
+  PrintTestCompilerStatus("C#" "${CMAKE_CSharp_COMPILER}")
+  file(WRITE "${test_compile_file}"
+    "namespace Test {"
+    "   public class CSharp {"
+    "       static void Main(string[] args) {}"
+    "   }"
+    "}"
+    )
+  try_compile(CMAKE_CSharp_COMPILER_WORKS ${CMAKE_BINARY_DIR} "${test_compile_file}"
+    OUTPUT_VARIABLE __CMAKE_CSharp_COMPILER_OUTPUT
+    )
+  # Move result from cache to normal variable.
+  set(CMAKE_CSharp_COMPILER_WORKS ${CMAKE_CSharp_COMPILER_WORKS})
+  unset(CMAKE_CSharp_COMPILER_WORKS CACHE)
+  if(NOT CMAKE_CSharp_COMPILER_WORKS)
+    message("forcing compiler works to true (will be removed once C# support is integrated)")
+    set(CMAKE_CSharp_COMPILER_WORKS 1)
+  endif()
+  set(CSharp_TEST_WAS_RUN 1)
+endif()
+
+if(NOT CMAKE_CSharp_COMPILER_WORKS)
+  PrintTestCompilerStatus("C#" "${CMAKE_CSharp_COMPILER} -- broken")
+  file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+    "Determining if the C# compiler works failed with "
+    "the following output:\n${__CMAKE_CSharp_COMPILER_OUTPUT}\n\n")
+  message(FATAL_ERROR "The C# compiler \"${CMAKE_CSharp_COMPILER}\" "
+    "is not able to compile a simple test program.\nIt fails "
+    "with the following output:\n ${__CMAKE_CSharp_COMPILER_OUTPUT}\n\n"
+    "CMake will not be able to correctly generate this project.")
+else()
+  if(CSharp_TEST_WAS_RUN)
+    PrintTestCompilerStatus("C#" "${CMAKE_CSharp_COMPILER} -- works")
+    file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+      "Determining if the C# compiler works passed with "
+      "the following output:\n${__CMAKE_CSharp_COMPILER_OUTPUT}\n\n")
+  endif()
+
+  # Re-configure to save learned information.
+  configure_file(
+    ${CMAKE_ROOT}/Modules/CMakeCSharpCompiler.cmake.in
+    ${CMAKE_PLATFORM_INFO_DIR}/CMakeCSharpCompiler.cmake
+    @ONLY
+    )
+  include(${CMAKE_PLATFORM_INFO_DIR}/CMakeCSharpCompiler.cmake)
+endif()