Certain newer Xcode features such as parallel builds require a newer version to be specified in the project file. Currently, even though we have enabled BuildIndependentTargetsInParallel in the project file, because the objectVersion is still set at 47 (Xcode 6.3), the setting is not used and we get a warning during build time. Upgrade the version to 54 (as automatically done by Xcode) which is Xcode 12 compatible in order to take advantage of parallle builds.
One caveat of incrementing the version is that older Xcode versions will not be able to open the project anymore (despite them being able to build it in command-line using xcodebuild). Generate a new xcodeproj with the old objectVersion and have CI check that it's not out of date whenever we change the original xcodeproj, so people using older Xcode versions can still debug and use Xcode with MacVim.
Note that the compatible version is compatible with Xcode 6.4, but the xib files are only buildable in Xcode 8+, so we just call it MacVim_xcode8.xcodeproj.
Certain newer Xcode features such as parallel builds require a newer version to be specified in the project file. Currently, even though we have enabled
BuildIndependentTargetsInParallelin the project file, because the objectVersion is still set at 47 (Xcode 6.3), the setting is not used and we get a warning during build time. Upgrade the version to 54 (as automatically done by Xcode) which is Xcode 12 compatible in order to take advantage of parallle builds.One caveat of incrementing the version is that older Xcode versions will not be able to open the project anymore (despite them being able to build it in command-line using xcodebuild). Generate a new xcodeproj with the old objectVersion and have CI check that it's not out of date whenever we change the original xcodeproj, so people using older Xcode versions can still debug and use Xcode with MacVim.
Note that the compatible version is compatible with Xcode 6.4, but the xib files are only buildable in Xcode 8+, so we just call it MacVim_xcode8.xcodeproj.
Related: #1100