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| author | Justin Bogner <mail@justinbogner.com> | 2016-02-04 07:28:30 +0000 |
|---|---|---|
| committer | Justin Bogner <mail@justinbogner.com> | 2016-02-04 07:28:30 +0000 |
| commit | e12385bd6a764aed0384ab3b5376030ec4159024 (patch) | |
| tree | 9c601d4a154efe9fdcf03e01f7f5aa76dd3a0de8 /llvm | |
| parent | d7ccafe35f292401f7e3905d67cf5122fa1bb380 (diff) | |
| download | bcm5719-llvm-e12385bd6a764aed0384ab3b5376030ec4159024.tar.gz bcm5719-llvm-e12385bd6a764aed0384ab3b5376030ec4159024.zip | |
cmake: Add a flag to enable LTO
This adds -DLLVM_ENABLE_LTO, rather than forcing people to manually
add -flto to the various _FLAGS variables.
llvm-svn: 259766
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/cmake/modules/HandleLLVMOptions.cmake | 7 | ||||
| -rw-r--r-- | llvm/docs/CMake.rst | 4 |
2 files changed, 11 insertions, 0 deletions
diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake index 9b6a590920e..99b23180bbb 100644 --- a/llvm/cmake/modules/HandleLLVMOptions.cmake +++ b/llvm/cmake/modules/HandleLLVMOptions.cmake @@ -656,6 +656,13 @@ append_if(LLVM_BUILD_INSTRUMENTED "-fprofile-instr-generate" CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) +option(LLVM_ENABLE_LTO "Enable link-time optimization" OFF) +append_if(LLVM_ENABLE_LTO "-flto" + CMAKE_CXX_FLAGS + CMAKE_C_FLAGS + CMAKE_EXE_LINKER_FLAGS + CMAKE_SHARED_LINKER_FLAGS) + # Plugin support # FIXME: Make this configurable. if(WIN32 OR CYGWIN) diff --git a/llvm/docs/CMake.rst b/llvm/docs/CMake.rst index 4e5feae9993..6d61442ed97 100644 --- a/llvm/docs/CMake.rst +++ b/llvm/docs/CMake.rst @@ -347,6 +347,10 @@ LLVM-specific variables are ``Address``, ``Memory``, ``MemoryWithOrigins``, ``Undefined``, ``Thread``, and ``Address;Undefined``. Defaults to empty string. +**LLVM_ENABLE_LTO**:BOOL + Add the ``-flto`` flag to the compile and link command lines, + enabling link-time optimization. Defaults to OFF. + **LLVM_PARALLEL_COMPILE_JOBS**:STRING Define the maximum number of concurrent compilation jobs. |
