http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51883
--- Comment #2 from mdblack98 at yahoo dot com 2012-01-17 17:13:20 UTC --- I should have realized that. Indeed those warning don't show up in later stages. Sorry for the noise. -----Original Message----- From: manu at gcc dot gnu.org [mailto:gcc-bugzi...@gcc.gnu.org] Sent: Tuesday, January 17, 2012 10:13 AM To: mdblac...@yahoo.com Subject: [Bug c/51883] Build warning unknown conversion type in gimplify.c http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51883 Manuel López-Ibáñez <manu at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |manu at gcc dot gnu.org Resolution| |INVALID --- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-01-17 16:12:55 UTC --- GCC is built in stages. The first stage uses the system compiler, which may have bugs or not handle special conversion type characters handled by the GCC version being built (this particular warning). Therefore, warnings produced by the system compiler are often wrong. Please, do not report them. http://gcc.gnu.org/wiki/FAQ#stage1warnings It would be nice to NOT produce any warning during stage 1, but I guess people are happy enough just ignoring them to not bother sending a patch to fix the build scripts. The build system of GCC is a huge complex mess, so one needs a very good reason to play games with it.