Trouble building gcj 4.8.1

Tue Jun 25 14:10:00 GMT 2013

> No, you have to put it in your own path. It does say so in the
> instructions.

Ah. The docs say:
"If this option is given, the ‘libjava’ build will create and install
an ecj1 executable which uses this jar file at runtime. If this
option is not given, but an ecj.jar file is found in the topmost
source tree at configure time, then the ‘libgcj’ build will create and
install ecj1, and will also install the discovered ecj.jar into a
suitable place in the install tree."
I interpreted "create and install" to mean it'll be put into bin by
"make install", it might be clearer if it said explicitly that you
have to copy it or put the script there yourself.
My goal with all this is to compile and run a Java program as a MIPS
program that is as small as possible, which I intend to do by:
 - Compiling with GCJ, as MIPS supporting Java VMs are rare
 - Enabling as many dead code elimination passes as possible,
including LTO with a static libgcj
in the hope that I can get a nice small, self contained binary out of the end.
As a bonus, I'd also like to enable usage of a library that this
program uses from C++ codebases using CNI, although that's secondary
right now.
Could you maybe elaborate on the ninja stuff? Why are there two copies
of these core classes? How much effort is it to fix things up - are we
talking a few days here, a few weeks, a few months?