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| author | Michael Lutz <michi@icosahedron.de> | 2021-01-02 01:09:11 +0100 |
|---|---|---|
| committer | Michael Lutz <michi@icosahedron.de> | 2021-01-02 01:26:26 +0100 |
| commit | 5b1fb942407436bd87042d5de1c0d289fbc397c0 (patch) | |
| tree | fa724e840892b29e7a3f3c49ac17779878f5c06f /cmake | |
| parent | 8596b43b2bdcebe51a06dbb770701983277a80ea (diff) | |
| download | openttd-5b1fb942407436bd87042d5de1c0d289fbc397c0.tar.xz | |
Codechange: [OSX] Prevent the compiler from using SSE4 instructions unless we want to.
This improves compatibility on older systems. We don't need to disable anything
older, as there are no SSE2-only Macs.
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/CompileFlags.cmake | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/cmake/CompileFlags.cmake b/cmake/CompileFlags.cmake index f371353ae..f0b8af061 100644 --- a/cmake/CompileFlags.cmake +++ b/cmake/CompileFlags.cmake @@ -127,6 +127,18 @@ macro(compile_flags) "$<$<BOOL:${LIFETIME_DSE_FOUND}>:-flifetime-dse=1>" ) endif() + + if(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang") + include(CheckCXXCompilerFlag) + check_cxx_compiler_flag("-mno-sse4" NO_SSE4_FOUND) + + if(NO_SSE4_FOUND) + add_compile_options( + # Don't use SSE4 for general sources to increase compatibility. + -mno-sse4 + ) + endif() + endif() elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Intel") add_compile_options( -Wall |