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CMake: Set default value for CMAKE_OSX_DEPLOYMENT_TARGET

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CMake versions older than 3.19 choose the sysroot based on the deployment target, so this does result in it choosing the 10.9 SDK even when targeting arm64, so we need to work around that.
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rdb 2020-12-18 23:59:40 +01:00
parent 53b8e52343
commit 2bb0a0a77c
1 changed files with 16 additions and 0 deletions
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16
CMakeLists.txt
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@ -51,6 +51,22 @@ else()
set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS ${_configs})
endif()
# Set defaults for macOS, must be before project().
if(APPLE)
set(CMAKE_OSX_DEPLOYMENT_TARGET "10.9" CACHE STRING "Minimum macOS version to target")
set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LIBRARY "libc++")
if(CMAKE_VERSION VERSION_LESS "3.19" AND NOT CMAKE_OSX_SYSROOT)
# Older CMake chose SDK based on deployment target, against Apple's recommendations.
# However, we need to use the latest to be able to target arm64.
if(IS_DIRECTORY "/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk")
set(CMAKE_OSX_SYSROOT "/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk" CACHE STRING "")
elseif(IS_DIRECTORY "/Library/Developer/CommandLineTools/SDKs/MacOSX11.0.sdk")
set(CMAKE_OSX_SYSROOT "/Library/Developer/CommandLineTools/SDKs/MacOSX11.0.sdk" CACHE STRING "")
endif()
endif()
endif()
# Figure out the version
set(_s "[\\t ]*") # CMake doesn't support \s*
file(STRINGS "setup.cfg" _version REGEX "^version${_s}=${_s}")