Missing separator on macro call ?

[David Holmes]

I just sync'd my local project with jdk10/hs and am getting a strange 
build error:

Building targets 'images test-image' in configuration 'linux-x64-debug'
lib/CompileJvm.gmk:207: *** missing separator.  Stop.
Line 207 is:

$(eval $(call SetupNativeCompilation, BUILD_LIBJVM, \

so it can't in itself have a missing separator!

I don't know how to try and debug this - any suggestions?

Thanks,
David