[FFmpeg-trac] #7048(build system:new): building 3.4.2 with gcc 7.3.0 with altivec support enabled fails on ppc (Gentoo Linux)
FFmpeg
trac at avcodec.org
Wed Feb 28 02:54:59 EET 2018
#7048: building 3.4.2 with gcc 7.3.0 with altivec support enabled fails on ppc
(Gentoo Linux)
-------------------------------------+-------------------------------------
Reporter: | Type: defect
ernsteiswuerfel | Priority: normal
Status: new | Version: 3.4
Component: build | Blocked By:
system | Reproduced by developer: 0
Keywords: gcc altivec |
ppc |
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
'''Building ffmpeg 3.4.2 with gcc 7.3.0 + altivec .... FAILS TO BUILD'''
Building ffmpeg 3.4.2 with gcc 7.3.0 - altivec .... BUILDS OK
Building ffmpeg 3.4.2 with gcc 6.4.0 + altivec .... BUILDS OK
Building ffmpeg 3.4.2 with gcc 6.4.0 - altivec .... BUILDS OK
I tried building ffmpeg 3.4.2 on my PowerMac G5 with gcc 7.3.0 and altivec
support enabled. The build stops giving me this error:
powerpc-unknown-linux-gnu-gcc -I. -Isrc/ -D_ISOC99_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112
-D_XOPEN_SOURCE=600 -DPIC -DZLIB_CONST -DHAVE_AV_CONFIG_H -Os -pipe
-mcpu=G5 -mtune=G5 -mcpu=970 -std=c11 -fomit-frame-pointer -fPIC
-maltivec -mabi=altivec -pthread -I/usr/include/freetype2
-I/usr/include/opus -I/usr/include/opus -D_REENTRANT -pthread
-I/usr/include/librsvg-2.0 -I/usr/include/gdk-pixbuf-2.0
-I/usr/include/libpng16 -I/usr/include/cairo -I/usr/include/glib-2.0
-I/usr/lib/glib-2.0/include -I/usr/include/pixman-1
-I/usr/include/freetype2 -I/usr/include/libdrm -I/usr/include/libpng16
-Wdeclaration-after-statement -Wall -Wdisabled-optimization -Wpointer-
arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-
prototypes -Wno-pointer-to-int-cast -Wstrict-prototypes -Wempty-body -Wno-
parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -Wno-
unused-const-variable -Wno-bool-operation -Os -pipe -mcpu=G5 -mtune=G5
-fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-
security -Werror=implicit-function-declaration -Werror=missing-prototypes
-Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto -Wno-
maybe-uninitialized -MMD -MF libavcodec/ppc/hevcdsp.d -MT
libavcodec/ppc/hevcdsp.o -c -o libavcodec/ppc/hevcdsp.o
src/libavcodec/ppc/hevcdsp.c
In file included from src/libavutil/ppc/util_altivec.h:32:0,
from src/libavcodec/ppc/hevcdsp.c:27:
src/libavcodec/ppc/hevcdsp.c: In function ‘scale’:
src/libavcodec/ppc/hevcdsp.c:73:23: error: argument 1 must be a 5-bit
signed literal
vec_u32 v_shift = vec_splat_u32(shift);
^
src/libavcodec/ppc/hevcdsp.c: In function ‘transform4x4.isra.0’:
src/libavcodec/ppc/hevcdsp.c:60:9: error: argument 1 must be a 5-bit
signed literal
add = vec_sl(vec_splat_s32(1), vec_splat_u32(shift - 1));
~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make: [/var/tmp/portage/media-
video/ffmpeg-3.4.2/work/ffmpeg-3.4.2/ffbuild/common.mak:60:
libavcodec/ppc/hevcdsp.o] Error 1
'''Building with altivec support disabled succeeds (gcc 7.3.0).'''
How to reproduce:
{{{
Build ffmpeg 3.4.2 on ppc hardware with gcc 7.3.0 and altivec support
enabled.
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7048>
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