From: Jeff Mitchell <quixoticsycophant@...>
Date: 2004-06-11T20:16:44+09:00
Subject: Re: #include <re.h> required for Opteron but not Pentium.


--- Sam Roberts <sroberts@uniserve.com> wrote:
> Quoteing jim@freeze.org, on Fri, Jun 11, 2004 at 02:20:12AM +0900:
> > > What compiler are you using? Are you sure you have the warning levels
> > > cranked high? Default build options on many compilers won't tell you
> > > about this kind of stuff.
> > > 
> > 
> > gcc
> > 
> > The warnings are whatever is generated by mkmf/create_makefile by default.
> 
> There's a chance that they do not include -Wall. I'd suggest always
> using this flag, at least during development.

I've been bitten by lack of signature checking in the default extconf.rb
makefile output.  Because a function is returning garbage for no apparent
reason it's an extremely difficult bug track down, if you are not aware
that prototype checks are absent.

I've been using $CFLAGS += " -Wall" if CONFIG["CC"] == "gcc".
I would prefer to add -Wstrict-prototypes as well, but this is
incompatible with ruby.h.

Is there portable way for extconf.rb to provide stricter checks, preferably
by default?



	
		
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