Problem using -R in MAKEFLAGS

Colm Aengus Murphy wrote:
> I tried using ".SUFFIXES:".
> Its a lot better but it still doesn't stop all of the
built in rules.
> 
> For the simple makefile:
> .SUFFIXES:  
> %.exe : %.c
>    gcc -o $(F) $<
> 
> I still get:
>  Considering target file `helloworld.c'.
>   Looking for an implicit rule for `helloworld.c'.

Right.  .SUFFIXES: only kills off the old-style suffix
rules, and not 
the pattern rules.  Hence there are some (quite a few
actually, that are 
still in effect).  If you want to kill the pattern rules
then you have 
three choices:

1. Specify -r on the command-line
2. Set -r in MAKEFLAGS in the environment before make is run
3. Kill them off one by one in the Makefile.

To do #3 for your example, you need to kill off the
following:

%.c: %.w %.ch
%:: RCS/%,v
%:: RCS/%
%:: SCCS/s.%
%:: %,v
%:: s.%

Just writing those lines above in your Makefile will be
enough.  You can 
use make -p to print out a list of the rules that are in
effect if you 
need to kill others.

John.
-- 
John Graham-Cumming
jgcjgc.org

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