On 10 September 2015 at 17:23, Martin Sebor wrote: > FWIW, I think the more common source of problems for those new > to building GCC is not having all the right prerequisites. The > GCC configure script tries to detect whether the right versions > are available but does only a superficial job (checks their > version macros) which can lead to cryptic build failures down > the line when not all the right architectures are installed > (e.g., the i686 in addition to x86_64). It also proceeds when > MPC is not installed at all which then causes the build to fail. Not having the right prerequisites certainly used to be a common problem (not quite as common as having them but installing them outside ld.so's search dirs and then not setting LD_LIBRARY_PATH). However, since I've been on a crusade to stop people doing that by pointing them at https://gcc.gnu.org/wiki/InstallingGCC and telling them to use contrib/download_prerequisites it is *much* less common than it used to be. Markus, I think your patch wouldn't hurt, and might help people who fail to read the instructions carefully, so I suggest sending it to gcc-patches for review.
