[bug?/question] Compilation fails

[Fabrizio-Caruso]

Running make or make all fails with:

cc -c -o regex/regfree.o -std=gnu99 -DLOCAL_REGEXP -I. -Wall -pedantic   regex/regfree.c
cc -o copt  copt.o regex/regcomp.o  regex/regerror.o regex/regexec.o  regex/regfree.o
cc -c -o killdeadlabel.o -std=gnu99 -DLOCAL_REGEXP -I. -Wall -pedantic   killdeadlabel.c
cc   killdeadlabel.o   -o killdeadlabel
make[1]: Leaving directory '/home/User/CC6303/copt'
(cd frontend; make)
make[1]: Entering directory '/home/User/CC6303/frontend'
cc -DBINPATH=\"/opt/cc68/bin/\" -DLIBPATH=\"/opt/cc68/lib/\" -DINCPATH=\"/opt/cc68/include/\"   -c -o cc.o cc.c
cc -o cc68 cc.o
make[1]: Leaving directory '/home/User/CC6303/frontend'
(cd libc; make)
make[1]: Entering directory '/home/User/CC6303/libc'
as6800 crt0.s
make[1]: as6800: No such file or directory
make[1]: *** [Makefile:7: crt0.o] Error 127
make[1]: Leaving directory '/home/User/CC6303/libc'
make: *** [Makefile:18: libc] Error 2