Comment 2 for bug 908508

Since landing of bug #684039, js/src/yarr/pcre fails to build on sparc64 (non-methodjit, non-tracejit) with the following errors :
js/src/yarr/pcre/pcre_exec.cpp:49:21: error: jsarena.h: No such file or directory
js/src/yarr/pcre/pcre_exec.cpp:96: error: ISO C++ forbids declaration of 'JSArenaPool' with no type
js/src/yarr/pcre/pcre_exec.cpp:96: error: expected ';' before '*' token
js/src/yarr/pcre/pcre_exec.cpp:99: error: 'JSArenaPool' has not been declared

full trace in http://buildbot.rhaalovely.net/builders/comm-central-sparc64/builds/158/steps/build/logs/stdio .. i'm surprised this hasnt been catched by try/tbpl. I don't know that code but it seems pcre_exec.cpp needs a bit of rewrite since that commit. I'm open to any suggestions, or cluebats explaining what i've done wrong.