http://forums.gentoo.org/viewtopic-t-517523-highlight-lisp.html Looks like @CFLAGS@ is not being replaced but the sed calls in src_unpack.
Gentoo Base System version 1.12.6 Portage 2.1.1-r1 (default-linux/x86/2006.1/desktop, gcc-3.4.6, glibc-2.4-r4, 2.6.17-gentoo-r4 i686) ================================================================= System uname: 2.6.17-gentoo-r4 i686 AMD Sempron(tm) Last Sync: Sat, 18 Nov 2006 01:00:01 +0000 ccache version 2.3 [disabled] app-admin/eselect-compiler: [Not Present] dev-java/java-config: [Not Present] dev-lang/python: 2.3.5, 2.4.3-r4 dev-python/pycrypto: 2.0.1-r5 dev-util/ccache: 2.3 dev-util/confcache: [Not Present] sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.60 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2 sys-devel/binutils: 2.16.1-r3 sys-devel/gcc-config: 1.3.13-r4 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.17-r1 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-march=athlon-xp -O3 -pipe -mmmx -msse -m3dnow -mfpmath=sse,387 -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /opt/glftpd/etc /opt/glftpd/ftp-data /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/share/X1 1/xkb" CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/terminfo /etc/texmf/web2c" CXXFLAGS="-O2 -march=athlon-xp -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="http://gentoo.chem.wisc.edu/gentoo/ http://gentoo.mirrors.pair.com/ http://mirror.clarkson.edu/pub/distributions/gentoo/ http://mirror.datapipe.net/gentoo ftp://linux.cs.lewisu.edu/gentoo/" LINGUAS="en" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --t imeout=180 --exclude='/distfiles' --exclude='/local' --exclude='/packages'" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://tartarus.olympus.net/gentoo-portage" USE="x86 3dnow 3dnowext X aac aalib alsa arts avi berkdb bitmap-fonts bonobo cairo cddb cdparanoia cdr cli cpudetection cracklib crypt c ups dbus dlloader doc dri dvd dvdr dvdread eds elibc_glibc emacs emboss encode esd fam firebird firefox flac font-server fontconfig fort ran fpx fxsr gdbm gif gimpprint gnome gnutls gpm graphviz gstreamer gtk gtk2 hal iconv imap input_devices_evdev input_devices_keyboard i nput_devices_mouse ipv6 isdnlog jack jbig jpeg kernel_linux ldap libg++ linguas_en linuxkeys lzo mad mailwrapper mbox mikmod mjpeg mmx m mxext mp3 mpeg mplayer mtrr mysql ncurses nls nntp nptl nptlonly nsplugin nvidia ofx ogg opengl oss pam pcre perl plotutils png ppds ppp d python qt3 qt4 quicktime readline real reflection samba sasl sdl session sndfile speex spell spl sse ssl subtitles tcpd tetex tiff tru etype truetype-fonts type1-fonts udev unicode userland_GNU via video_cards_nvidia vorbis win32codecs wmf xanim xgetdefault xine xinerama xml xorg xv xvid zlib" Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, PORTAGE_RSYNC_EXTRA_OPTS
What about the latest current version?
I tried 19d_pre1 and 19d_p2 and both substitute @CFLAGS@ just fine.