2a9b3b4943
In a typical build environment the toolchain will use the value of the MACOSX_DEPLOYMENT_TARGET environment variable to determine the version of macOS to support. When cross compiling there are two distinct toolchains, but they will look at this single environment variable. To avoid contamination, we always set the equivalent command line flag which effectively disables the toolchain's internal handling. Prior to this change, the MACOSX_DEPLOYMENT_TARGET variable was ignored, and the toolchains always used the Nix platform definition (`darwinMinVersion`) unless overridden with command line arguments. This change restores support for MACOSX_DEPLOYMENT_TARGET, and adds nix-specific MACOSX_DEPLOYMENT_TARGET_FOR_BUILD and MACOSX_DEPLOYMENT_TARGET_FOR_TARGET for cross compilation.
73 lines
2.6 KiB
Bash
73 lines
2.6 KiB
Bash
# Unconditionally adding in platform version flags will result in warnings that
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# will be treated as errors by some packages. Add any missing flags here.
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# There are two things to be configured: the "platform version" (oldest
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# supported version of macos, ios, etc), and the "sdk version".
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#
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# The modern way of configuring these is to use:
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# -platform_version $platform $platform_version $sdk_version"
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#
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# The old way is still supported, and uses flags like:
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# -${platform}_version_min $platform_version
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# -sdk_version $sdk_version
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#
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# If both styles are specified ld will combine them. If multiple versions are
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# specified for the same platform, ld will emit an error.
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#
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# The following adds flags for whichever properties have not already been
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# provided.
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havePlatformVersionFlag=
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haveDarwinSDKVersion=
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haveDarwinPlatformVersion=
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mangleVarSingle MACOSX_DEPLOYMENT_TARGET ${role_suffixes[@]+"${role_suffixes[@]}"}
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n=0
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nParams=${#params[@]}
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while (( n < nParams )); do
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p=${params[n]}
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case "$p" in
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# the current platform
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-@darwinPlatform@_version_min)
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haveDarwinPlatformVersion=1
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;;
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# legacy aliases
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-macosx_version_min|-iphoneos_version_min|-iosmac_version_min|-uikitformac_version_min)
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haveDarwinPlatformVersion=1
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;;
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-sdk_version)
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haveDarwinSDKVersion=1
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;;
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-platform_version)
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havePlatformVersionFlag=1
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# If clang can't determine the sdk version it will pass 0.0.0. This
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# has runtime effects so we override this to use the known sdk
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# version.
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if [ "${params[n+3]-}" = 0.0.0 ]; then
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params[n+3]=@darwinSdkVersion@
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fi
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;;
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esac
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n=$((n + 1))
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done
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# If the caller has set -platform_version, trust they're doing the right thing.
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# This will be the typical case for clang in nixpkgs.
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if [ ! "$havePlatformVersionFlag" ]; then
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if [ ! "$haveDarwinSDKVersion" ] && [ ! "$haveDarwinPlatformVersion" ]; then
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# Nothing provided. Use the modern "-platform_version" to set both.
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extraBefore+=(-platform_version @darwinPlatform@ "${MACOSX_DEPLOYMENT_TARGET_@suffixSalt@:-@darwinMinVersion@}" @darwinSdkVersion@)
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elif [ ! "$haveDarwinSDKVersion" ]; then
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# Add missing sdk version
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extraBefore+=(-sdk_version @darwinSdkVersion@)
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elif [ ! "$haveDarwinPlatformVersion" ]; then
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# Add missing platform version
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extraBefore+=(-@darwinPlatform@_version_min "${MACOSX_DEPLOYMENT_TARGET_@suffixSalt@:-@darwinMinVersion@}")
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fi
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fi
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