diff options
Diffstat (limited to 'cmake/modules/HandleLLVMOptions.cmake')
| -rw-r--r-- | cmake/modules/HandleLLVMOptions.cmake | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake index d5afc626f9..5b332ac74d 100644 --- a/cmake/modules/HandleLLVMOptions.cmake +++ b/cmake/modules/HandleLLVMOptions.cmake @@ -295,6 +295,17 @@ elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE ) append_if(USE_NO_MAYBE_UNINITIALIZED "-Wno-maybe-uninitialized" CMAKE_CXX_FLAGS) check_cxx_compiler_flag("-Werror -Wnon-virtual-dtor" CXX_SUPPORTS_NON_VIRTUAL_DTOR_FLAG) append_if(CXX_SUPPORTS_NON_VIRTUAL_DTOR_FLAG "-Wnon-virtual-dtor" CMAKE_CXX_FLAGS) + + # Check if -Wcomment is OK with an // comment ending with '\' if the next + # line is also a // comment. + set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) + set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} -Werror -Wcomment) + CHECK_C_SOURCE_COMPILES("// \\\\\\n//\\nint main() {return 0;}" + C_WCOMMENT_ALLOWS_LINE_WRAP) + set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) + if (NOT C_WCOMMENT_ALLOWS_LINE_WRAP) + append("-Wno-comment" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) + endif() endif (LLVM_ENABLE_WARNINGS) append_if(LLVM_ENABLE_WERROR "-Werror" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) if (LLVM_ENABLE_CXX1Y) |