inconsistent CFLAGS between toplevel and gcc/

[Andrew Pinski]

On Jul 18, 2005, at 12:32 AM, Ben Elliston wrote:

> I have recently been noticing inconsistent warnings when building GCC 
> (for example,
> warnings about uninitialised variables in gcc/ddg.c).  I had not 
> realised it, but the
> top-level CFLAGS defaults to "-g -O2" whereas gcc's Makefile sets 
> CFLAGS to "-g" by
> default.  So, if you compile this way:
>
>   cd gcc; make
>
> you miss uninitalised warnings and the like caught by:
>   make all-gcc
>
> at the toplevel.  Why shouldn't gcc's CFLAGS include -O2 given that 
> most end-users
> are building using the toplevel Makefile?


"make bootstrap" should have caught the warnings.  Doing a make inside 
GCC and not
getting optimizations is very useful for debugging problems that 
reported.

Thanks,
Andrew Pinski