From 0e8c40d6439acdc2a31f2c1c4eab5d547baa01a6 Mon Sep 17 00:00:00 2001 From: Evgeniy Stepanov Date: Tue, 6 May 2014 09:46:06 +0000 Subject: Disable -Wcomment when building with GCC. GCC version of -Wcomment is not compatible with ascii art graph diagrams. Reverts r207629. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208073 91177308-0d34-0410-b5e6-96231b3b80d8 --- cmake/modules/HandleLLVMOptions.cmake | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'cmake') 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) -- cgit v1.2.3