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[CMake] Add an LLVM_ENABLE_MODULE_DEBUGGING flag for building with -gmodules.

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This flag is only effective in builds with debug info and modules.
The default is On for Darwin only.

rdar://problem/27019000

llvm-svn: 274244
This commit is contained in:
Adrian Prantl 2016-06-30 17:15:44 +00:00
parent c47b447e60
commit a0611feb1f
2 changed files with 7 additions and 0 deletions
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2
CMakeLists.txt
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@ -284,8 +284,10 @@ option(LLVM_ENABLE_PIC "Build Position-Independent Code" ON)
option(LLVM_ENABLE_WARNINGS "Enable compiler warnings." ON)
option(LLVM_ENABLE_MODULES "Compile with C++ modules enabled." OFF)
if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
option(LLVM_ENABLE_MODULE_DEBUGGING "Compile with -gmodules." ON)
option(LLVM_ENABLE_LOCAL_SUBMODULE_VISIBILITY "Compile with -fmodules-local-submodule-visibility." OFF)
else()
option(LLVM_ENABLE_MODULE_DEBUGGING "Compile with -gmodules." OFF)
option(LLVM_ENABLE_LOCAL_SUBMODULE_VISIBILITY "Compile with -fmodules-local-submodule-visibility." ON)
endif()
option(LLVM_ENABLE_CXX1Y "Compile with C++1y enabled." OFF)

5
cmake/modules/HandleLLVMOptions.cmake
View File

@ -473,6 +473,11 @@ elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
if (LLVM_ENABLE_LOCAL_SUBMODULE_VISIBILITY)
set(module_flags "${module_flags} -Xclang -fmodules-local-submodule-visibility")
endif()
if (LLVM_ENABLE_MODULE_DEBUGGING AND
((uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG") OR
(uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")))
set(module_flags "${module_flags} -gmodules")
endif()
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${module_flags}")
# Check that we can build code with modules enabled, and that repeatedly