On Mon, Nov 01, 2010 at 09:04:12AM -0400, Tom "spot" Callaway wrote: > On 10/30/2010 06:01 AM, Richard W.M. Jones wrote: > > 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@hawtness ~]$ gcc -O2 -frecord-gcc-switches -g -o hello hello.c > >> [jstanley@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. > > I agree. Unless there is a notable performance cost in this, I say we > should go for it. -frecord-gcc-switches is unfortunately pretty much useless, see http://gcc.gnu.org/PR32998. Please don't add it, we want something actually usable, not this option. Jakub -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
