PATCH: virtual memory exhausted when xmalloc(0) returns 0

[John Jenniskens]

Hello,
 
Given the following very small makefile:
 
all:
        @echo TEST Succesfull!!
 
make-3.80  with --no-builtin-rules fails:
 
/home/huminf/johnj> make --no-builtin-rules -f test.mak
make: *** virtual memory exhausted.  Stop.
 
This occurs on platforms where malloc(0) returns 0. I've found the error
on AIX and on TRU64 (dec-osf) platforms.
 
Enclosed you'll find the patch for implicit.c
 
When using my patch, the result is:
 
/home/huminf/johnj> make-3.80/make --no-builtin-rules -f test.mak
TEST Succesfull!!

Kind regards,
 
John Jenniskens

implicit.patch
Description: implicit.patch