Guile 1.8.1 build

[Michael C. Vergallen]

while compiling guile-1.8.1 on Solaris 9 with gcc-3.3.2 I get the following 
error :

scmsigs.c  -fPIC -DPIC -o .libs/libguile_la-scmsigs.o
scmsigs.c: In function `ensure_signal_delivery_thread':
scmsigs.c:191: warning: missing braces around initializer
scmsigs.c:191: warning: (near initialization for `once.__pthread_once_pad')
gmake[3]: *** [libguile_la-scmsigs.lo] Error 1
gmake[3]: Leaving directory `/export/home/mvergall/work/guile-1.8.1/libguile'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/export/home/mvergall/work/guile-1.8.1/libguile'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/export/home/mvergall/work/guile-1.8.1'
gmake: *** [all] Error 2

what is the problem here ? 

Regards,

Michael C. Vergallen.