I tried to compile gtkada on my AMD64 system within my 32-bit chroot environment; it failed complaining that "i68664" is not a valid argument to -march (who'd'a thunk it? :-) ). I found that gnat.eclass does some rather simplistic mangling of the CFLAGS variable, using a regular expression to change all instances of several known -march arguments, including athlon but NOT including athlon64, to i686. I added a line (diff attached) to the eclass, and now it's compiling happily. emerge --info: root@mythrilspoon (32) ~ # emerge --info Portage 2.0.51.22-r2 (default-linux/x86/2005.0, gcc-4.0.1, glibc-2.3.5.20050421-r0, 2.6.12-gentoo-r3 i686) ================================================================= System uname: 2.6.12-gentoo-r3 i686 AMD Athlon(tm) 64 Processor 3200+ Gentoo Base System version 1.6.12 distcc 2.18.3 i386-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled] dev-lang/python: 2.3.5, 2.4.1-r1 sys-apps/sandbox: 1.2.9 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.5 sys-devel/binutils: 2.16.1 sys-devel/libtool: 1.5.18 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i386-pc-linux-gnu" CFLAGS="-O2 -march=athlon64 -fomit-frame-pointer -pipe" CHOST="i386-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=athlon64 -fomit-frame-pointer -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" LANG="en_US.utf8" LC_ALL="en_US.utf8" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/home/jyrinx/var/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 X alsa apm avi bash-completion berkdb bitmap-fonts crypt cscope cups eds emboss encode flac foomaticdb fortran gcj gd gdbm gif gpm gstreamer gtk gtk2 imlib ipv6 java jpeg junit libg++ libwww mad mikmod mozilla mp3 mpeg ncurses nls nptl ogg oggvorbis opengl pam pdflib perl png python qt quicktime readline spell ssl tcpd truetype truetype-fonts type1-fonts vorbis xine xml2 xmms xv xvid zlib userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LDFLAGS, LINGUAS, MAKEOPTS
Created attachment 64944 [details, diff] Adding line to handle -march=athlon64 (An afterthought: Just to clarify, I realize gnat isn't supported under AMD64; it's just the chroot that makes it act like a bona fide x86 system. Really, this same bug would apply to someone with a full 32-bit install on an Athlon 64 system, which could have the same CFLAGS.)
Thanks you Luke. Your fix has been added to CVS.
