-frecord-gcc-switches as default CFLAG?

[Richard W.M. Jones]

On Sat, Oct 30, 2010 at 02:24:02AM -0400, Jon Stanley wrote:
> I noticed on my Fedora 13 box that in the RPM macro %__global_cflags
> that -frecord-gcc-switches is missing, which is a nifty compiler
> feature that will record the flags passed to gcc in a section in the
> object file, thus aiding in the "how in the world was this compiled?"
> problem. An example:
> 
> [jstanley at hawtness ~]$ gcc -O2 -frecord-gcc-switches -g -o hello hello.c
> [jstanley at hawtness ~]$ readelf -p .GCC.command.line hello
> 
> String dump of section '.GCC.command.line':
>   [     0]  hello.c
>   [     8]  -mtune=generic
>   [    17]  -g
>   [    1a]  -O2
>   [    1e]  -frecord-gcc-switches
> 
> What do folks think about adding this as a default? Any reason not to
> (other than possibly a few bytes extra in the object files)?

+1

I think would also catch those cases where some gcc flag is found to
break code generation.  You reasonably see which binaries were
affected.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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