When using any -O mmv can't be built with gcc-3.4.1. All other options (see emerge info below) work if you just delete -O3 or -O2 . Reproducible: Always Steps to Reproduce: 1. CFLAGS=".... -O* ...." emerge mmv 2. 3. Actual Results: valhalla root # emerge mmv Calculating dependencies ...done! >>> emerge (1 of 1) app-misc/mmv-1.01b to / >>> md5 src_uri ;-) mmv_1.01b.orig.tar.gz >>> md5 src_uri ;-) mmv_1.01b-12.diff.gz >>> Unpacking source... >>> Unpacking mmv_1.01b.orig.tar.gz to /var/tmp/portage/mmv-1.01b/work * Applying mmv_1.01b-12.diff.gz... [ ok ] >>> Source unpacked. gcc -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -march=pentium4 -pipe -fomit-frame-pointer -fstack-protector -mfpmath=sse -mmmx -msse -c -o mmv.o mmv.c mmv.c:132: warning: conflicting types for built-in function 'malloc' In file included from /usr/include/bits/string2.h:1299, from /usr/include/string.h:396, from mmv.c:189: /usr/include/stdlib.h:556: error: conflicting types for 'malloc' mmv.c:132: error: previous declaration of 'malloc' was here /usr/include/stdlib.h:556: error: conflicting types for 'malloc' mmv.c:132: error: previous declaration of 'malloc' was here mmv.c: In function `doreps': mmv.c:2393: warning: passing arg 2 of `signal' from incompatible pointer type make: *** [mmv.o] Error 1 !!! ERROR: app-misc/mmv-1.01b failed. !!! Function src_compile, Line 31, Exitcode 2 !!! (no error message) Expected Results: valhalla root # emerge info Portage 2.0.50-r10 (gcc34-x86-2004.2, gcc-3.4.1, glibc-2.3.4.20040808-r0, 2.6.8.1) ================================================================= System uname: 2.6.8.1 i686 Intel(R) Xeon(TM) CPU 2.40GHz Gentoo Base System version 1.5.3 Autoconf: sys-devel/autoconf-2.59-r4 Automake: sys-devel/automake-1.8.5-r1 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CFLAGS="-O3 -march=pentium4 -pipe -fomit-frame-pointer -fstack-protector -mfpmath=sse -mmmx -msse" CHOST="i686-pc-linux-gnu" COMPILER="" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/local/kde/3.2/share/config /usr/local/share/config /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/bind /var/qmail/control" CONFIG_PROTECT_MASK="/etc/afs/C /etc/afs/afsws /etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O3 -march=pentium4 -pipe -fomit-frame-pointer -fstack-protector -mfpmath=sse -mmmx -msse" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs buildpkg ccache sandbox" GENTOO_MIRRORS="ftp://ftp.uni-erlangen.de/mirrors/gentoo/" MAKEOPTS="-j5" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="MM_APACHE MM_GLIBC MM_KDE MM_MPLAYER MM_OPENOFFICE MM_OPENSSH MM_OPENVPN MM_XORG X X509 acl adns alsa apache2 apm arts artswrappersuid avi berkdb cdparanoia cdr chroot crypt cups dga dio divx4linux dvb dvd dvdr encode ethereal exif fam flac foomaticdb gdbm gif gphoto2 gpm gstreamer gtk gtk2 imagemagick imap imlib innodb insecure-drivers ipv6 jabber jack java jpeg kde kerberos ldap libg++ libwww linguas_de mad maildir mailwrapper memlimit mikmod mmx mng motif mpeg mpi mysql mysqli nas ncurses network nls nptl offensive oggvorbis ooo-kde openal opengl oscar oss pam pcmcia pcre pda pdflib perl php pic pie png pnp posix ppds prelude pthreads python qt quicktime readline recode samba scanner sdl sftplogging shared sharedmem slang slp snmp sockets socks5 spell sqlite sse ssl svg svga tcpd tetex theora threads tidy tiff truetype trusted unicode usb vhosts video_cards_radeon wifi x86 xine xinerama xml2 xmms xosd xpm xv xvid zlib"
Just rebuilding a system. Other -march don't work either (i686).
fixed in portage, thanks
