JRuby compatibility

[sobrinho]

@tenderlove,

I'm not sure if it's a JRuby issue or something related to racc itself.

I didn't tried to fix it yet because I'm not a C developer, I will need some time to detect what's wrong :)

That's the output on jruby-1.6.7.2:

Building native extensions.  This could take a while...
ERROR:  Error installing racc:
    ERROR: Failed to build gem native extension.

        /Users/sobrinho/.rbenv/versions/jruby-1.6.7.2/bin/jruby extconf.rb
WARNING: JRuby does not support native extensions or the `mkmf' library very well.
Check http://kenai.com/projects/jruby/pages/Home for alternatives.
creating Makefile

make
cc -I. -I/Users/sobrinho/.rbenv/versions/jruby-1.6.7.2/lib/native/include -I/Users/sobrinho/.rbenv/versions/jruby-1.6.7.2/lib/native/include/ruby -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE      -fPIC -DTARGET_RT_MAC_CFM=0  -fno-omit-frame-pointer -fno-strict-aliasing  -fexceptions    -arch x86_64 -c cparse.c
cparse.c:289:8: warning: implicit declaration of function 'rb_iter_break' is invalid in C99 [-Wimplicit-function-declaration]
       rb_iter_break(); 
       ^
cparse.c:672:12: warning: implicit declaration of function 'rb_catch' is invalid in C99 [-Wimplicit-function-declaration]
    code = rb_catch("racc_jump", reduce0, v->value_v);
           ^
2 warnings generated.
cc -dynamic -bundle -undefined dynamic_lookup  -o cparse.bundle cparse.o -L"." -L"/Users/sobrinho/.rbenv/versions/jruby-1.6.7.2/lib" -bundle -framework JavaVM -Wl,-syslibroot, -mmacosx-version-min=10.5   -arch x86_64  
ld: library not found for -lbundle1.o
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [cparse.bundle] Error 1


Gem files will remain installed in /Users/sobrinho/.rbenv/versions/jruby-1.6.7.2/lib/ruby/gems/1.8/gems/racc-1.4.8 for inspection.
Results logged to /Users/sobrinho/.rbenv/versions/jruby-1.6.7.2/lib/ruby/gems/1.8/gems/racc-1.4.8/ext/racc/gem_make.out

Similar error is happening on travis: http://travis-ci.org/#!/rails/journey/jobs/1935123

Probably @headius can confirm that it is related to JRuby :)

[zenspider]

cparse.c:289:8: warning: implicit declaration of function 'rb_iter_break' is invalid in C99 [-Wimplicit-function-declaration]
       rb_iter_break(); 

That is most likely a problem on the jruby side. Or a problem with the build system, which would probably also be on the jruby side (mkmf.rb) as described in the output:

WARNING: JRuby does not support native extensions or the `mkmf' library very well.
Check http://kenai.com/projects/jruby/pages/Home for alternatives.
creating Makefile

[zenspider]

Also, see here: http://kenai.com/projects/jruby/pages/CExtensions

[zenspider]

Since you only need the racc gem to compile grammars, and it looks like jruby ships with the racc runtime (it'll have to run in pure ruby mode, I guess), I'm gonna go ahead and say this is a jruby issue, but a low priority one. You can always compile a grammar with MRI + the racc gem and then run it on jruby.