CMake/Modules/CMakeDetermineCSharpCompiler.cmake
Brad King d1f38ba65d CMakeDetermineCompilerId: Consider UTF-16 encodings of INFO strings
Our compiler identification source encodes `INFO:compiler[...]` and
similar strings in compiled objects or binaries that we then extract to
get information about the compiler.  With most compilers the strings are
encoded in the binaries as a simple byte sequence.  However, some
compilers use other encodings.  For example, the MS CSharp compiler uses
UTF-16LE and a TI compiler uses UTF-16BE.  Try each encoding.

Fixes: #19459
2019-07-11 09:50:30 -04:00

43 lines
1.6 KiB
CMake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
if(NOT ${CMAKE_GENERATOR} MATCHES "Visual Studio ([^9]|[9][0-9])")
message(FATAL_ERROR
"C# is currently only supported for Microsoft Visual Studio 2010 and later.")
endif()
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake)
#include(Platform/${CMAKE_SYSTEM_NAME}-Determine-CSharp OPTIONAL)
#include(Platform/${CMAKE_SYSTEM_NAME}-CSharp OPTIONAL)
if(NOT CMAKE_CSharp_COMPILER_NAMES)
set(CMAKE_CSharp_COMPILER_NAMES csc)
endif()
# Build a small source file to identify the compiler.
if(NOT CMAKE_CSharp_COMPILER_ID_RUN)
set(CMAKE_CSharp_COMPILER_ID_RUN 1)
# Try to identify the compiler.
set(CMAKE_CSharp_COMPILER_ID)
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
CMAKE_DETERMINE_COMPILER_ID(CSharp CSFLAGS CMakeCSharpCompilerId.cs)
execute_process(COMMAND "${CMAKE_CSharp_COMPILER}" "/help /preferreduilang:en-US" OUTPUT_VARIABLE output)
string(REPLACE "\n" ";" output "${output}")
foreach(line ${output})
string(TOUPPER ${line} line)
string(REGEX REPLACE "^.*COMPILER.*VERSION[^\\.0-9]*([\\.0-9]+).*$" "\\1" version "${line}")
if(version AND NOT "x${line}" STREQUAL "x${version}")
set(CMAKE_CSharp_COMPILER_VERSION ${version})
break()
endif()
endforeach()
message(STATUS "The CSharp compiler version is ${CMAKE_CSharp_COMPILER_VERSION}")
endif()
# configure variables set in this file for fast reload later on
configure_file(${CMAKE_ROOT}/Modules/CMakeCSharpCompiler.cmake.in
${CMAKE_PLATFORM_INFO_DIR}/CMakeCSharpCompiler.cmake
@ONLY
)