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| author | Chris Bieneman <beanz@apple.com> | 2015-11-24 08:04:59 +0000 |
|---|---|---|
| committer | Chris Bieneman <beanz@apple.com> | 2015-11-24 08:04:59 +0000 |
| commit | 7494dc5e5562e2f14cc00a4b1c3f910e63c7f119 (patch) | |
| tree | 641b4f98c47026b3200236eda5a6df7238fd2d63 /llvm/cmake | |
| parent | 812465436bb1ac9fe7652d0df01c0b3d77dddb9e (diff) | |
| download | bcm5719-llvm-7494dc5e5562e2f14cc00a4b1c3f910e63c7f119.tar.gz bcm5719-llvm-7494dc5e5562e2f14cc00a4b1c3f910e63c7f119.zip | |
[CMake] When disabling PIC, also pass -fno-pie when linking if it is supported.
Building clang with -fno-pie generates slightly faster code. In my not-very-rigorous testing I saw about a 4% speed up using the clang test-suite sources.
llvm-svn: 253959
Diffstat (limited to 'llvm/cmake')
| -rwxr-xr-x | llvm/cmake/config-ix.cmake | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/cmake/config-ix.cmake b/llvm/cmake/config-ix.cmake index c984a19e85f..4b342bc586b 100755 --- a/llvm/cmake/config-ix.cmake +++ b/llvm/cmake/config-ix.cmake @@ -299,6 +299,10 @@ if( LLVM_ENABLE_PIC ) set(ENABLE_PIC 1) else() set(ENABLE_PIC 0) + check_cxx_compiler_flag("-fno-pie" SUPPORTS_NO_PIE_FLAG) + if(SUPPORTS_NO_PIE_FLAG) + list(APPEND CMAKE_EXE_LINKER_FLAGS "-fno-pie") + endif() endif() check_cxx_compiler_flag("-Wno-variadic-macros" SUPPORTS_NO_VARIADIC_MACROS_FLAG) |
