I am trying to compile fwlogwatch (http://fwlogwatch.inside-security.de/) in OS X (10.4) and come up with some compile errors.

I have checked Darwinports but there is currently not a port for fwlogwatch.

The output is listed below:
MyBox:~/bin/fwlogwatch-1.0 Hattori$ make
flex -B -t cisco_ios.l > cisco_ios.c
gcc -DHAVE_ZLIB -DHAVE_GETTEXT -pipe -O2 -Wall -c -o cisco_ios.o cisco_ios.c
In file included from cisco_ios.l:14:
main.h:20:21: error: libintl.h: No such file or directory
make: *** [cisco_ios.o] Error 1
rm cisco_ios.c