Bug 129304 – fftw fails to build with altivec support and gcc-4.x

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description SpanKY 2006-04-08 20:24:42 UTC]

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

[Comment 1 Luca Barbato 2006-04-09 05:18:29 UTC]

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

[Comment 2 Luca Barbato 2006-04-09 06:48:13 UTC]

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

(at least is working here on the G4)

[Comment 3 SpanKY 2006-04-09 10:12:16 UTC]

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 ;)

[Comment 4 SpanKY 2006-04-09 14:19:13 UTC]

Created attachment 84322 [details, diff]
fftw-altivec-headers.patch

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

[Comment 5 Markus Dittrich (RETIRED) 2006-04-10 06:33:51 UTC]

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

[Comment 6 SpanKY 2006-04-10 15:24:45 UTC]

it should

[Comment 7 Markus Dittrich (RETIRED) 2006-04-10 22:07:54 UTC]

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

[Comment 8 SpanKY 2006-04-10 22:21:10 UTC]

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

[Comment 9 Markus Dittrich (RETIRED) 2006-04-10 23:10:04 UTC]

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

Markus