Gpgtools GPG Keychain Access

I pulled the latest commit (b884da7a) from the repo, but I also tried the one before d9f323fe.

Libmacgpg compiles without issues. But when I do a make in the GPGKeychainAccess directory, I get an error:

In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/IOKit.framework/Headers/hidsystem/IOHIDTypes.h:40:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/libkern/OSAtomic.h:43:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/libkern/OSAtomicDeprecated.h:247:9: note: 'OSAtomicAdd64Barrier' has been
      explicitly marked deprecated here
int64_t OSAtomicAdd64Barrier( int64_t __theAmount,
        ^

18 warnings generated.

Ld /Users/tessus/data/work/GPGTools/GPGKeychainAccess/build/Release/GPG\ Keychain.app/Contents/MacOS/GPG\ Keychain normal x86_64 (in target 'GPG Keychain' from project 'GPGKeychain')
    cd /Users/tessus/data/work/GPGTools/GPGKeychainAccess
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -target x86_64-apple-macos10.12 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -L/Users/tessus/data/work/GPGTools/GPGKeychainAccess/build/Release -F/Users/tessus/data/work/GPGTools/GPGKeychainAccess/build/Release -F/Users/tessus/data/work/GPGTools/GPGKeychainAccess/Dependencies/Libmacgpg/build/Release -F/Users/tessus/data/work/GPGTools/GPGKeychainAccess/Dependencies/Zxcvbn/build/Release -F/Library/Frameworks -F/Users/tessus/Library/Frameworks -filelist /Users/tessus/data/work/GPGTools/GPGKeychainAccess/build/GPGKeychain.build/Release/GPG\ Keychain.build/Objects-normal/x86_64/GPG\ Keychain.LinkFileList -Xlinker -rpath -Xlinker @executable_path/../Frameworks -fobjc-arc -fobjc-link-runtime -lsqlite3 -framework QuartzCore -framework CoreImage -framework ScriptingBridge -framework Security -weak_framework Libmacgpg -framework Cocoa /Users/tessus/data/work/GPGTools/GPGKeychainAccess/Dependencies/Zxcvbn/build/Release/Zxcvbn.framework/Zxcvbn -Xlinker -dependency_info -Xlinker /Users/tessus/data/work/GPGTools/GPGKeychainAccess/build/GPGKeychain.build/Release/GPG\ Keychain.build/Objects-normal/x86_64/GPG\ Keychain_dependency_info.dat -o /Users/tessus/data/work/GPGTools/GPGKeychainAccess/build/Release/GPG\ Keychain.app/Contents/MacOS/GPG\ Keychain
ld: reference to bitcode symbol '_objc_destroyWeak' which LTO has not compiled in '-[GKMenuButton .cxx_destruct]' from /tmp/lto.o for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

** BUILD FAILED **


The following build commands failed:
    Ld /Users/tessus/data/work/GPGTools/GPGKeychainAccess/build/Release/GPG\ Keychain.app/Contents/MacOS/GPG\ Keychain normal x86_64
(1 failure)
make: *** [GPG Keychain] Error 65

Any idea, what's going on? Btw, compiling it from the Xcode UI works. Very strange.