On Wed, Apr 04, 2001 at 02:06:22PM +0200, Maciej W. Rozycki wrote: > Date: Wed, 4 Apr 2001 14:06:22 +0200 (MET DST) > From: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl> > To: Ralf Baechle <ralf@oss.sgi.com> > cc: Florian Lohoff <flo@rfc822.org>, "Kevin D. Kissell" <kevink@mips.com>, > "MIPS/Linux List (SGI)" <linux-mips@oss.sgi.com> > Subject: Re: Dumb Question on Cross-Development > > On Tue, 3 Apr 2001, Ralf Baechle wrote: > > > Brokeness starts with autoconf's AC_CHECK_SIZEOF macro implementation > > which is used frequently throughout a whole distribution and there are > > so many test that require actually execution of code on the target that > > fix a whole distribution for crosscompilation and keeping it uptodate > > is seriously double-plus un-fun. > > Well, I can't see any other way to check sizeof of a type. OTOH, I > haven't seen many programs that call AC_CHECK_SIZEOF on unions or structs > -- that's where the real problem might be as predicting member alignment > is not always easy (especially for "evil" objects -- but if such ones > exist the actual problem is a badly written program begging for a > rewrite). There is no need to check sizeof for simple types -- ISO C > <stdint.h> types might be used if a desired number of bits in a type is > needed with a fallback to AC_CHECK_SIZEOF for legacy hosts only (which we > don't care that much of). In short, the macro shouldn't really be used in > most cases. > > I sustain the problem does not lie in the tool but in its usage. stdint.h isn't available everywhere. Aside of that I won't object ... Ralf
