cc -O2  -Werror   -I/usr/src/gnu/usr.bin/gas.new -I/usr/src/gnu/usr.bin/gas.
new/
arch/i386  -I/usr/src/gnu/lib/bfd -I/usr/src/gnu/usr.bin/gas.new/../../dist/
gas
-I/usr/src/gnu/usr.bin/gas.new/../../dist/gas/config  -I/usr/src/gnu/usr.bin
/gas
.new/../../dist/bfd -I/usr/src/gnu/usr.bin/gas.new/../../dist/include -I/usr
/src
/gnu/usr.bin/gas.new/../../dist  -D_GNU_SOURCE  -o depend
/usr/src/gnu/usr.bin/g
as.new/../../dist/gas/depend.c
/usr/lib/crt0.o: Undefined symbol `_main' referenced from text segment
/tmp/ccZDBU9x.o: Undefined symbol `_xmalloc' referenced from text segment
/tmp/ccZDBU9x.o: Undefined symbol `_xstrdup' referenced from text segment
/tmp/ccZDBU9x.o: Undefined symbol `_out_file_name' referenced from text
segment
/tmp/ccZDBU9x.o: Undefined symbol `_as_warn' referenced from text segment
collect2: ld returned 1 exit status
*** Error code 1

This was reported, yesterday I think, by Chris Jones.

Regards
Nigel