www/firefox - building with debugging fails

[[LoN]Kamikaze]

I am currently trying to port an extension for firefox and wanted to
build firefox with debugging so that I can track down a segfault.
Unfortunately I cannot build firefox with debugging.

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cc -o jsd_high.o -c  -DMOZILLA_INTERNAL_API -DOSTYPE=\"FreeBSD6\"
-DOSARCH=\"FreeBSD\" -DBUILD_ID=0000000000 -DEXPORT_JSD_API
-I../../dist/include/js -I../../dist/include/string
-I../../dist/include/xpcom -I../../dist/include/xpconnect
-I../../dist/include/widget -I../../dist/include/dom
-I../../dist/include/jsdebug -I../../dist/include
-I/usr/local/include/nspr -I/usr/local/include -I/usr/local/include
-I../../dist/sdk/include -I/usr/X11R6/include   -fPIC
-I/usr/X11R6/include  -I/usr/X11R6/include  -I/usr/X11R6/include -Wall
-W -Wno-unused -Wpointer-arith -Wcast-align -Wno-long-long -O2
-fno-strict-aliasing -pipe -march=pentium-m -pipe  -DDEBUG -D_DEBUG
-DDEBUG_root -DTRACING -g -O  -I/usr/X11R6/include  -I/usr/X11R6/include
 -I/usr/X11R6/include -include ../../mozilla-config.h -DMOZILLA_CLIENT
jsd_high.c
jsd_high.c: In function `jsd_DebugErrorHook':
jsd_high.c:340: error: `errorReporterData' undeclared (first use in this
function)
jsd_high.c:340: error: (Each undeclared identifier is reported only once
jsd_high.c:340: error: for each function it appears in.)
gmake[2]: *** [jsd_high.o] Error 1
gmake[2]: Leaving directory
`/mnt/vault/work/mnt/vault/ports/www/firefox/work/mozilla/js/jsd'
gmake[1]: *** [tier_50] Error 2
gmake[1]: Leaving directory
`/mnt/vault/work/mnt/vault/ports/www/firefox/work/mozilla'
gmake: *** [default] Error 2
*** Error code 2