problem when trying to build metamail package with unstable

[Michael Moerz <aon.912411198@aon.at>]

I have tried to build the metamail package with unstable, 
but following error occured:

(cd metamail ; make  CONFIGDIR=../.  CFLAGS="-g -I.   " CC="cc"  LDLIBS="")
make[1]: Entering directory `/home/potato/dist/home/mike/debian/metamail-2.7/metamail'
rm -f metamail.o
cc -c  -I../. -g -I.    metamail.c
In file included from metamail.c:47:
/usr/include/signal.h:117: parse error before `-'
/usr/include/signal.h:117: parse error before `int'
make[1]: *** [metamail.o] Error 1
make[1]: Leaving directory `/home/potato/dist/home/mike/debian/metamail-2.7/metamail'
make: *** [basics] Error 2

I would have fixed that when a '-' would have been in line 117 of signal.h,
but there is none. Any suggestions?

Well I have been trying everything what I know, but nothing
helped me.

-- 
kind regards,
Michael Moerz