Building OpenJDK with Xcode12 devkits on older macOS

[Baesken, Matthias]

Hello, I noticed the following when building jdk  on  macOS 10.14 with xcode12 devkit .
The tool  "xcodebuild"   which  is used at some places in the configure process (see basic.m4 / toolchain.m4) fails because of the too old macOS :

configure:70788: xcodebuild output: dyld: Library not loaded: /System/Library/Frameworks/Combine.framework/Versions/A/Combine
configure:70790: error: Failed to determine Xcode version.

But when I rename/remove the xcodebuild  from the devkit, the builds work perfectly fine (because the compilers do not have these deps to Combine.framework).
So I wonder - is there a "nicer"  way to achieve this without renaming/removing the xcodebuild  tool from the devkit (e.g. by setting other configure options or env variables) ?


Thanks, Matthias