Review Request: 8004151: build-infra: Generating X11 wrapper offset file is not cross compilable (AWT folks look here!)

[Fredrik Öhrström]

The GensrcX11Wrapper.gmk makefile creates a new sizes.32 or sizes.64 by 
running a generated C program
that performs many sizeof calculations on X11 structures. This is cross 
compileable.

Fortunately the sizes.32 and sizes.64 offset files are very stable. Thus 
we can commit them to the
source code repository. When not cross compiling we perform a 
verification step that
regenerates the offset file for the build platforms bits, and checks 
that it is the same
as the committed version.

Patch is here:
http://cr.openjdk.java.net/~ohrstrom/webrev-8004151-gensrcX11wrapper/
(do not read the diff of the makefile, read the new makefile, too many 
changes.)

Question: by always supplying both sizes.32 and sizes.64 to the 
generator tool, it
seems like it is encoding both offsets into the java classes. This might 
not always
have been done before. Good or bad?

//Fredrik