On Thu, Feb 14, 2013 at 03:13:55PM -0800, H. Peter Anvin wrote: > From: "H. Peter Anvin" <hpa@xxxxxxxxx> > > bc is the standard tool for multi-precision arithmetic. We switched > to Perl because akpm reported a hard-to-reproduce build hang, which > was very odd because affected and unaffected machines were all running > the same version of GNU bc. > > Unfortunately switching to Perl required a really ugly "canning" > mechanism to support Perl < 5.8 installations lacking the Math::BigInt > module. > > It was recently pointed out to me that some very old versions of GNU > make had problems with pipes in subshells, which was indeed the > construct used in the Makefile rules in that version of the patch; > Perl didn't need it so switching to Perl fixed the problem for > unrelated reasons. With the problem (hopefully) root-caused, we can > switch back to bc and do the arbitrary-precision arithmetic naturally. > > Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Cc: Michal Marek <mmarek@xxxxxxx> > Cc: Sam Ravnborg <sam@xxxxxxxxxxxx> The kbuild stuff looks fine. The bc stuff I do not know about. Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
