xcrun: error: unable to lookup item 'PlatformVersion' from command line tools installation

[yffwang]

I'm compiling a Subtrstrate project on macos with version 15.1.1 (Intel), and I met the problem like this:

cargo:rerun-if-env-changed=CXXFLAGS_x86_64-apple-darwin
CXXFLAGS_x86_64-apple-darwin = None
cargo:rerun-if-env-changed=CXXFLAGS_x86_64_apple_darwin
CXXFLAGS_x86_64_apple_darwin = None
cargo:rerun-if-env-changed=HOST_CXXFLAGS
HOST_CXXFLAGS = None
cargo:rerun-if-env-changed=CXXFLAGS
CXXFLAGS = None
cargo:warning=xcrun: error: unable to lookup item 'PlatformVersion' from command line tools installation
cargo:warning=xcrun: error: unable to lookup item 'PlatformVersion' in SDK '/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
cargo:warning=macOS deployment target (10.7) too low, it will be increased

The compiler is the xcode command line tools installed by Homebrew (no xcode app installed), the platform version result is like:

$ xcrun --show-sdk-platform-version
xcrun: error: unable to lookup item 'PlatformVersion' from command line tools installation
xcrun: error: unable to lookup item 'PlatformVersion' in SDK '/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk

but if I switched to the Xcode App by this way:

sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

The platform version would be configured automatically and the compiling would be successful.
So when using the xcode command line tool and cc tool, do we have to specify the platform version in advance, such as by setting the environment variable MACOSX_DEPLOYMENT_TARGET？ Otherwise, the entire compilation process will fail due to problems obtaining the platform version.

[madsmtm]

Hmm, cc-rs doesn't invoke xcrun --show-sdk-platform-version, it invokes xcrun --show-sdk-version --sdk macosx.

Does the problem still appear when you run that?

[madsmtm]

Also, what version of cc-rs are you using? Because this might have already been fixed by #1007 (v1.0.94).

[yffwang]

using cxx v1.0.121 (built dependency cc v1.0.83)

Ah I noticed the fix #1007 , I think this is the key. Thank you and will try the new version next.