0.99 fails to compile with gcc 4.1.1

Here's the tail end of the compile output (Gentoo, gtk+ 2.8.18, gcc 4.1.1
glib 2.10.3, gmime 2.2.1, anything else useful? reformatted slightly for
posting):

if x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I. -I../..  -I../.. 
-I/usr/include/gtkspell-2.0 -I/usr/include/gtk-2.0
-I/usr/lib64/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo
-I/usr/include/pango-1.0 -I/usr/include/glib-2.0
-I/usr/lib64/glib-2.0/include   -I/usr/include/gtk-2.0
-I/usr/lib64/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo
-I/usr/include/pango-1.0 -I/usr/include/glib-2.0
-I/usr/lib64/glib-2.0/include   -I/usr/include/gmime-2.0
-I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  
-I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  
-DPANLOCALEDIR=\""/usr/share/locale"\"   -march=k8 -Os -pipe
-fomit-frame-pointer -frename-registers -funit-at-a-time -fweb
-freorder-blocks -ftree-pre -fmerge-all-constants -MT pan.o -MD -MP -MF
".deps/pan.Tpo" -c -o pan.o pan.cc; \
        then mv -f ".deps/pan.Tpo" ".deps/pan.Po"; else rm -f
        ".deps/pan.Tpo"; exit 1; fi

url.cc: In function 'void pan::pan_url_show(const char*)':
url.cc:83: error: '_' was not declared in this scope 
make[3]: *** [url.o] Error 1 
make[3]: Leaving directory `/tmp/portage/pan-0.99/work/pan-0.99/pan/gui' 

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman