diff options
Diffstat (limited to 'cmake')
| -rwxr-xr-x | cmake/config-ix.cmake | 18 | ||||
| -rw-r--r-- | cmake/modules/HandleLLVMOptions.cmake | 6 |
2 files changed, 24 insertions, 0 deletions
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake index a313e9cbb0..b079a0738b 100755 --- a/cmake/config-ix.cmake +++ b/cmake/config-ix.cmake @@ -305,6 +305,24 @@ include(CheckCXXCompilerFlag) check_cxx_compiler_flag("-Wno-variadic-macros" SUPPORTS_NO_VARIADIC_MACROS_FLAG) +set(USE_NO_MAYBE_UNINITIALIZED 0) +set(USE_NO_UNINITIALIZED 0) + +# Disable gcc's potentially uninitialized use analysis as it presents lots of +# false positives. +if (CMAKE_COMPILER_IS_GNUCXX) + check_cxx_compiler_flag("-Wmaybe-uninitialized" HAS_MAYBE_UNINITIALIZED) + if (HAS_MAYBE_UNINITIALIZED) + set(USE_NO_MAYBE_UNINITIALIZED 1) + else() + # Only recent versions of gcc make the distinction between -Wuninitialized + # and -Wmaybe-uninitialized. If -Wmaybe-uninitialized isn't supported, just + # turn off all uninitialized use warnings. + check_cxx_compiler_flag("-Wuninitialized" HAS_UNINITIALIZED) + set(USE_NO_UNINITIALIZED ${HAS_UNINITIALIZED}) + endif() +endif() + include(GetHostTriple) get_host_triple(LLVM_HOST_TRIPLE) diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake index 3cf1ef20e4..91210804c3 100644 --- a/cmake/modules/HandleLLVMOptions.cmake +++ b/cmake/modules/HandleLLVMOptions.cmake @@ -206,6 +206,12 @@ elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE ) if( C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG ) set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wcovered-switch-default" ) endif() + if (USE_NO_UNINITIALIZED) + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-uninitialized") + endif() + if (USE_NO_MAYBE_UNINITIALIZED) + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-maybe-uninitialized") + endif() endif (LLVM_ENABLE_WARNINGS) if (LLVM_ENABLE_WERROR) add_llvm_definitions( -Werror ) |