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. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
