compile issue

[Anders Knudsen <anders knudsen broadlogic com>]

First time trying to compile balsa. It looks like a very cool mail client!
I am compiling on a RH7.0 box. Configure gets through without any problems. 
At end of compile, I get the following:

ranlib libmutt.a
make[4]: Leaving directory `/usr/local/src/balsa-1.0.pre5/libmutt'
make[3]: Leaving directory `/usr/local/src/balsa-1.0.pre5/libmutt'
make[2]: Leaving directory `/usr/local/src/balsa-1.0.pre5/libmutt'
Making all in libbalsa
make[2]: Entering directory `/usr/local/src/balsa-1.0.pre5/libbalsa'
gcc -DHAVE_CONFIG_H -I. -I. -I.. -I. -I.. -I../libmutt  -I/usr/include 
-DNEED_GNOMESUPPORT_H -I/usr/lib/gnome-libs/include -I/usr/lib/glib/include 
-I/usr/X11R6/include  -I/usr/lib/glib/include -I/usr/X11R6/include  -g -O2 
-I/usr/lib/glib/include -D_REENTRANT         -Wall 
-Wno-uninitialized         -Wchar-subscripts -Wmissing-declarations 
-Wmissing-prototypes         -Wnested-externs 
-Wpointer-arith         -Wno-sign-compare -Wsign-promo         -Werror -c 
message.c
gcc -DHAVE_CONFIG_H -I. -I. -I.. -I. -I.. -I../libmutt  -I/usr/include 
-DNEED_GNOMESUPPORT_H -I/usr/lib/gnome-libs/include -I/usr/lib/glib/include 
-I/usr/X11R6/include  -I/usr/lib/glib/include -I/usr/X11R6/include  -g -O2 
-I/usr/lib/glib/include -D_REENTRANT         -Wall 
-Wno-uninitialized         -Wchar-subscripts -Wmissing-declarations 
-Wmissing-prototypes         -Wnested-externs 
-Wpointer-arith         -Wno-sign-compare -Wsign-promo         -Werror -c 
body.c
cc1: warnings being treated as errors
body.c: In function `libbalsa_message_body_set_mutt_body':
body.c:84: warning: implicit declaration of function `strlen'
make[2]: *** [body.o] Error 1
make[2]: Leaving directory `/usr/local/src/balsa-1.0.pre5/libbalsa'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/local/src/balsa-1.0.pre5'
make: *** [all-recursive-am] Error 2

Any ideas appreciated...

-Anders.