Autoconf proper doesn't support it out of the box, but packages like GCC (and others that use multilib support) may run several configure scripts in parallel (each with separate config.cache files, out of necessity for independent reasons). The output of such a build is quite cluttered and hard to read, as the checking malloc.h presence...
and the eventual yes are not output together. Now that we use shell functions, this could probably be fixed even without a lot of extra bloat in the configure script by delaying the output of AC_MSG_CHECKING until the AC_MSG_RESULT and printing it with one command. It could be enabled with some switch. Anyway, it's not very urgent or anything, merely a "would be nice to have" thing. Or I'll try it out in gcc/config/override.m4 eventually. Cheers, Ralf
