ninja: Entering directory `out/gn'
[1/1] Regenerating ninja files
FAILED: build.ninja 
../../llvm/utils/gn/bin/linux-amd64/gn --root=../.. -q --dotfile=../../llvm/utils/gn/.gn gen .
ERROR at //llvm/lib/Support/BUILD.gn:37:5: Expected comma between items.
    "ABIBreak.cpp",
    ^-------------
ninja: error: rebuilding 'build.ninja': subcommand failed
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.