Bugzilla Bug 129304

havent gotten around to poking at the source ...

root@G5[ppc] 0 nonportable # make 2>&1 | head
if /bin/sh ../../libtool --tag=CC --mode=compile powerpc-unknown-linux-gnu-gcc
-DHAVE_CONFIG_H -I. -I. -I../..  -I../../kernel -I../../simd  -maltivec
-mabi=altivec -DFAKE__VEC__ -O2 -mtune=powerpc -pipe -pthread -MT sse.lo -MD
-MP -MF ".deps/sse.Tpo" -c -o sse.lo sse.c; \
then mv -f ".deps/sse.Tpo" ".deps/sse.Plo"; else rm -f ".deps/sse.Tpo"; exit 1;
fi
 powerpc-unknown-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../kernel
-I../../simd -maltivec -mabi=altivec -DFAKE__VEC__ -O2 -mtune=powerpc -pipe
-pthread -MT sse.lo -MD -MP -MF .deps/sse.Tpo -c sse.c  -fPIC -DPIC -o
.libs/sse.o
In file included from ../../simd/simd.h:30,
                 from sse.c:24:
../../simd/simd-altivec.h:42: error: expected '=', ',', ';', 'asm' or
'__attribute__' before 'float'
../../simd/simd-altivec.h:47: error: expected '=', ',', ';', 'asm' or
'__attribute__' before 'VADD'
../../simd/simd-altivec.h:48: error: expected '=', ',', ';', 'asm' or
'__attribute__' before 'VSUB'
../../simd/simd-altivec.h:49: error: expected '=', ',', ';', 'asm' or
'__attribute__' before 'VFMA'
../../simd/simd-altivec.h:50: error: expected '=', ',', ';', 'asm' or
'__attribute__' before 'VFNMS'



Portage 2.1_pre7-r4 (default-linux/ppc/2005.1/ppc, gcc-4.1.0, glibc-2.4-r2,
2.6.16-gentoo ppc)
=================================================================
System uname: 2.6.16-gentoo ppc PPC970MP, altivec supported
Gentoo Base System version 1.12.0_pre17
distcc 2.18.3 powerpc-unknown-linux-gnu (protocols 1 and 2) (default port 3632)
[disabled]
ccache version 2.4 [enabled]
dev-lang/python:     2.4.2-r1
sys-apps/sandbox:    1.2.17
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, 1.9.6-r2
sys-devel/binutils:  2.15.90.0.3-r5, 2.16.1-r2, 2.16.91.0.3, 2.16.91.0.4,
2.16.91.0.5, 2.16.91.0.6, 2.16.91.0.7
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.11-r4
ACCEPT_KEYWORDS="ppc ~ppc"
AUTOCLEAN="yes"
CBUILD="powerpc-unknown-linux-gnu"
CFLAGS="-O2 -mtune=powerpc -pipe"
CHOST="powerpc-unknown-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.5/env
/usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/kde/3/share/config
/usr/share/X11/xkb /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/eselect/compiler /etc/gconf /etc/revdep-rebuild
/etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -mtune=powerpc -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig buildpkg ccache distlocks metadata-transfer noauto noinfo
parallel-fetch sandbox sfperms splitdebug"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/linux/distributions/gentoo"
LDFLAGS="-Wl,-O1 -Wl,-z,relro"
MAKEOPTS="-j6"
PKGDIR="/usr/portage/packages/powerpc-unknown-linux-gnu"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="ppc X a52 aac aalib acl alsa altivec asf audiofile berkdb bitmap-fonts
boundschecking bzip2 cairo cddb cdparanoia cdr crypt css cups curl directfb dri
dts dvd dvdr dvdread emboss encode fame ffmpeg flac fontconfig gd gif glitz gpm
gstreamer gtk gtk2 imagemagick ipv6 isdnlog jbig jpeg jpeg2k kde libcaca libwww
lzo mad matroska mikmod mjpeg mng modplug motif mp3 mpeg multislot musepack
ncurses nls nptl nptlonly ogg oggvorbis openal opengl pdf pdflib perl php png
pppd python qt quicktime readline rle samba sdl sndfile spell ssl subversion
tcltk tcpd tga theora tiff truetype truetype-fonts type1-fonts unicode vcd
vidix vorbis xanim xinetd xml xml2 xmms xpm xprint xrandr xv xvid yv12 zlib
elibc_glibc kernel_linux userland_GNU"
Unset:  ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL,
LINGUAS

I fixed a version long ago and sent the bugfix upstream, but this one looks
unrelated.

using -mtune=G4, -mtune=G3 or USE -altivec it should work.

(at least is working here on the G4)

Mark pointed out the bug here:

configure:21661: checking altivec.h usability
configure:21673: powerpc-unknown-linux-gnu-gcc -c -O2 -mtune=powerpc -pipe 
conftest.c >&5
In file included from conftest.c:75:
/usr/lib/gcc/powerpc-unknown-linux-gnu/4.1.0/include/altivec.h:37:2: error:
#error Use the "-maltivec" flag to enable PowerPC AltiVec support
configure:21679: $? = 1

and indeed, if i change config.h to define HAVE_ALTIVEC_H, the compile works

so not a gcc bug ;)

Created an attachment (id=84322) [edit]
fftw-altivec-headers.patch

this patch should fix the issue (it did for me) ... it should also be sent
upstream ...

Hi SpanKY,

Thank you very much for the patch! Does it by any
chance also fix the altivec issues with gcc-3.4 (the ebuild 
disables altivec for gcc-3.4 at the moment)?

Thanks,
Markus

it should

Hi SpanKY,

I've just added the patch to the fftw-3.1.1.ebuild and will send it
upstream as well. Thanks again!

best,
Markus

you need to run autoconf in src_unpack after applying the patch ... either that
or create a patch against configure ...

Thanks for pointing that out and for your patience :(
I added an eautoconf and I better get some sleep now.

Markus