diff options
| -rw-r--r-- | llvm/cmake/modules/HandleLLVMOptions.cmake | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake index 7036e742873..83c8fe6b767 100644 --- a/llvm/cmake/modules/HandleLLVMOptions.cmake +++ b/llvm/cmake/modules/HandleLLVMOptions.cmake @@ -347,6 +347,17 @@ if( MSVC ) # "Enforce type conversion rules". append("/Zc:rvalueCast" CMAKE_CXX_FLAGS) + if (CMAKE_CXX_COMPILER_ID MATCHES "Clang") + # In VS 2015, char16_t became a builtin type. Clang still defaults to VS + # 2013 compatibility, where it cannot be a builtin type. If we're using an + # STL newer than 2015, this compilation will fail. Rasing the MSVC + # compatibility version of the compiler will provide char16/32. + check_cxx_source_compiles("#include <cstdint>\nchar16_t v1;\n" STL_PROVIDES_CHAR16_T) + if (NOT STL_PROVIDES_CHAR16_T) + append("-fms-compatibility-version=19" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) + endif() + endif() + if (NOT LLVM_ENABLE_TIMESTAMPS AND CMAKE_CXX_COMPILER_ID MATCHES "Clang") # clang-cl and cl by default produce non-deterministic binaries because # link.exe /incremental requires a timestamp in the .obj file. clang-cl |
