[Libav-user] Unable to compile i386 compatible ffmpeg dylibs on Mac OS X

Simon Daniels simondaniels23 at gmail.com
Thu Nov 24 19:44:33 CET 2011


Hi Carl,

Apologies - I had tried without -fomit-frame-pointer and replacing it
with -fno-omit-frame-pointer but that wasn't what I pasted in the
email. I'll be more detailed this time.

Here's what I did this time. I'm sticking to ffmpeg-0.8.7 because I am
a distributor.

1. Ran ./configure --cc="gcc -m32" --disable-decoder=h264

2. Ran make. Resulted in:
CC	libavcodec/h264_cabac.o
cc1: error in backend: Ran out of registers during register allocation!
make: *** [libavcodec/h264_cabac.o] Error 1

3. Ran make V=1. Resulted in:
gcc -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DHAVE_AV_CONFIG_H -std=c99
-mdynamic-no-pic -fomit-frame-pointer -g -Wdeclaration-after-statement
-Wall -Wno-parentheses -Wno-switch -Wdisabled-optimization
-Wpointer-arith -Wredundant-decls -Wno-pointer-sign -Wcast-qual
-Wwrite-strings -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast
-O3 -fno-math-errno -mllvm -stack-alignment=16  -MMD -MF
libavcodec/h264_cabac.d -MT libavcodec/h264_cabac.o -c -o
libavcodec/h264_cabac.o libavcodec/h264_cabac.c
cc1: error in backend: Ran out of registers during register allocation!
make: *** [libavcodec/h264_cabac.o] Error 1

4. Added -fno-omit-frame-pointer to end and ran gcc -m32 -I.
-I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DHAVE_AV_CONFIG_H -std=c99
-mdynamic-no-pic -fomit-frame-pointer -g -Wdeclaration-after-statement
-Wall -Wno-parentheses -Wno-switch -Wdisabled-optimization
-Wpointer-arith -Wredundant-decls -Wno-pointer-sign -Wcast-qual
-Wwrite-strings -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast
-O3 -fno-math-errno -mllvm -stack-alignment=16  -MMD -MF
libavcodec/h264_cabac.d -MT libavcodec/h264_cabac.o -c -o
libavcodec/h264_cabac.o -fno-omit-frame-pointer
libavcodec/h264_cabac.c

Resulted in:
cc1: error in backend: Ran out of registers during register allocation!

5. Tried removing -fomit-frame-pointer from original command and ran
gcc -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DHAVE_AV_CONFIG_H -std=c99
-mdynamic-no-pic -g -Wdeclaration-after-statement -Wall
-Wno-parentheses -Wno-switch -Wdisabled-optimization -Wpointer-arith
-Wredundant-decls -Wno-pointer-sign -Wcast-qual -Wwrite-strings
-Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast -O3
-fno-math-errno -mllvm -stack-alignment=16  -MMD -MF
libavcodec/h264_cabac.d -MT libavcodec/h264_cabac.o -c -o
libavcodec/h264_cabac.o libavcodec/h264_cabac.c

Resulted in:
cc1: error in backend: Ran out of registers during register allocation!

6. Tried replacing -fomit-frame-pointer with -fno-omit-frame-pointer
and ran gcc -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7"
-D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
-DHAVE_AV_CONFIG_H -std=c99 -mdynamic-no-pic -fno-omit-frame-pointer
-g -Wdeclaration-after-statement -Wall -Wno-parentheses -Wno-switch
-Wdisabled-optimization -Wpointer-arith -Wredundant-decls
-Wno-pointer-sign -Wcast-qual -Wwrite-strings -Wundef
-Wmissing-prototypes -Wno-pointer-to-int-cast -O3 -fno-math-errno
-mllvm -stack-alignment=16  -MMD -MF libavcodec/h264_cabac.d -MT
libavcodec/h264_cabac.o -c -o libavcodec/h264_cabac.o
libavcodec/h264_cabac.c

Resulted in:
cc1: error in backend: Ran out of registers during register allocation!

7. I'm repeating steps 1-6 now using clang. Ran ./configure
--cc="clang -m32" --disable-decoder=h264

8. Run make. Resulted in:
CC	libavcodec/h264_cabac.o
fatal error: error in backend: Ran out of registers during register allocation!
Cannot allocate: %vreg6948,inf = [162608u,162612d:0)  0 at 162608u
Please check your inline asm statement for invalid constraints:
INLINEASM <es:movl ${6:a}($5), $2
	movl ${7:a}($5), $1
	movzbl ($4)    , $0
	mov    $2     , $3
	and    $$0xC0       , $2
	movzbl _ff_h264_lps_range($0, $2, 2), $2
	sub    $2     , $3
	mov    $3       , %ecx
	shl    $$17         , $3
	sub    $1       , $3
	sar    $$31         , $3
	sub    %ecx       , $2
	and    $3       , $2
	add    %ecx       , $2
	shl    $$17         , %ecx
	and    $3       , %ecx
	sub    %ecx       , $1
	xor    $3       , $0
	movzbl _ff_h264_norm_shift($2), %ecx
	shl    %cl        , $2
	movzbl _ff_h264_mlps_state+128($0), $3
	mov    ${3:b}   , ($4)
	shl    %cl        , $1
	test   ${1:w}   , ${1:w}
	 jnz   1f
	mov ${8:a}($5), %ecx
	movzwl (%ecx)     , $3
	bswap  $3
	shr    $$15         , $3
	sub    $$0xFFFF     , $3
	add    $$2          , %ecx
	mov    %ecx   , ${8:a}($5)
	lea    -1($1)   , %ecx
	xor    $1       , %ecx
	shr    $$15         , %ecx
	movzbl _ff_h264_norm_shift(%ecx), %ecx
	neg    %ecx
	add    $$7          , %ecx
	shl    %cl        , $3
	add    $3       , $1
	1:
	movl $2, ${6:a}($5)
	movl $1, ${7:a}($5)
	> [sideeffect], $0:[regdef-ec], %vreg6948<earlyclobber,def>,
$1:[regdef-ec], %vreg3438<earlyclobber,def,dead>, $2:[regdef-ec],
%vreg3439<earlyclobber,def,dead>, $3:[regdef-ec],
%vreg3440<earlyclobber,def,dead>, $4:[reguse], %vreg3441<kill>,
$5:[reguse], %vreg6882<kill>, $6:[imm], 4, $7:[imm], 0, $8:[imm], 16,
$9:[clobber], %ECX<earlyclobber,imp-def,dead>, $10:[clobber],
%EFLAGS<earlyclobber,imp-def,dead>, <<badref>>;
GR32_ABCD:%vreg6948,%vreg3440
GR32:%vreg3438,%vreg3439,%vreg3441,%vreg6882
dbg:libavcodec/x86/cabac.h:93:5 @[ libavcodec/cabac.h:340:5 @[
libavcodec/h264_cabac.c:1726:13 @[ libavcodec/h264_cabac.c:1737:5 @[
libavcodec/h264_cabac.c:1762:5 @[ libavcodec/h264_cabac.c:2322:21 ] ]
] ] ]

make: *** [libavcodec/h264_cabac.o] Error 1


9. Ran make V=1. Resulted in:
clang -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -DHAVE_AV_CONFIG_H
-std=c99 -mdynamic-no-pic -fomit-frame-pointer -fPIC -g
-Wdeclaration-after-statement -Wall -Wno-parentheses -Wno-switch
-Wdisabled-optimization -Wpointer-arith -Wredundant-decls
-Wno-pointer-sign -Wcast-qual -Wwrite-strings -Wtype-limits -Wundef
-Wmissing-prototypes -Wno-pointer-to-int-cast -O3 -fno-math-errno
-fno-signed-zeros -mllvm -stack-alignment=16 -Qunused-arguments  -MMD
-c -o libavcodec/h264_cabac.o libavcodec/h264_cabac.c
fatal error: error in backend: Ran out of registers during register allocation!
Cannot allocate: %vreg6948,inf = [162608u,162612d:0)  0 at 162608u
Please check your inline asm statement for invalid constraints:
INLINEASM <es:movl ${6:a}($5), $2
	movl ${7:a}($5), $1
	movzbl ($4)    , $0
	mov    $2     , $3
	and    $$0xC0       , $2
	movzbl _ff_h264_lps_range($0, $2, 2), $2
	sub    $2     , $3
	mov    $3       , %ecx
	shl    $$17         , $3
	sub    $1       , $3
	sar    $$31         , $3
	sub    %ecx       , $2
	and    $3       , $2
	add    %ecx       , $2
	shl    $$17         , %ecx
	and    $3       , %ecx
	sub    %ecx       , $1
	xor    $3       , $0
	movzbl _ff_h264_norm_shift($2), %ecx
	shl    %cl        , $2
	movzbl _ff_h264_mlps_state+128($0), $3
	mov    ${3:b}   , ($4)
	shl    %cl        , $1
	test   ${1:w}   , ${1:w}
	 jnz   1f
	mov ${8:a}($5), %ecx
	movzwl (%ecx)     , $3
	bswap  $3
	shr    $$15         , $3
	sub    $$0xFFFF     , $3
	add    $$2          , %ecx
	mov    %ecx   , ${8:a}($5)
	lea    -1($1)   , %ecx
	xor    $1       , %ecx
	shr    $$15         , %ecx
	movzbl _ff_h264_norm_shift(%ecx), %ecx
	neg    %ecx
	add    $$7          , %ecx
	shl    %cl        , $3
	add    $3       , $1
	1:
	movl $2, ${6:a}($5)
	movl $1, ${7:a}($5)
	> [sideeffect], $0:[regdef-ec], %vreg6948<earlyclobber,def>,
$1:[regdef-ec], %vreg3438<earlyclobber,def,dead>, $2:[regdef-ec],
%vreg3439<earlyclobber,def,dead>, $3:[regdef-ec],
%vreg3440<earlyclobber,def,dead>, $4:[reguse], %vreg3441<kill>,
$5:[reguse], %vreg6882<kill>, $6:[imm], 4, $7:[imm], 0, $8:[imm], 16,
$9:[clobber], %ECX<earlyclobber,imp-def,dead>, $10:[clobber],
%EFLAGS<earlyclobber,imp-def,dead>, <<badref>>;
GR32_ABCD:%vreg6948,%vreg3440
GR32:%vreg3438,%vreg3439,%vreg3441,%vreg6882
dbg:libavcodec/x86/cabac.h:93:5 @[ libavcodec/cabac.h:340:5 @[
libavcodec/h264_cabac.c:1726:13 @[ libavcodec/h264_cabac.c:1737:5 @[
libavcodec/h264_cabac.c:1762:5 @[ libavcodec/h264_cabac.c:2322:21 ] ]
] ] ]

make: *** [libavcodec/h264_cabac.o] Error 1


10. Added -fno-omit-frame-pointer to end and ran clang -m32 -I.
-I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -DHAVE_AV_CONFIG_H
-std=c99 -mdynamic-no-pic -fomit-frame-pointer -fPIC -g
-Wdeclaration-after-statement -Wall -Wno-parentheses -Wno-switch
-Wdisabled-optimization -Wpointer-arith -Wredundant-decls
-Wno-pointer-sign -Wcast-qual -Wwrite-strings -Wtype-limits -Wundef
-Wmissing-prototypes -Wno-pointer-to-int-cast -O3 -fno-math-errno
-fno-signed-zeros -mllvm -stack-alignment=16 -Qunused-arguments  -MMD
-c -o libavcodec/h264_cabac.o -fno-omit-frame-pointer
libavcodec/h264_cabac.c

Resulted in:
fatal error: error in backend: Ran out of registers during register allocation!
Cannot allocate: %vreg5942,inf = [162608u,162616d:0)  0 at 162608u
Please check your inline asm statement for invalid constraints:
INLINEASM <es:movl ${6:a}($5), $2
	movl ${7:a}($5), $1
	movzbl ($4)    , $0
	mov    $2     , $3
	and    $$0xC0       , $2
	movzbl _ff_h264_lps_range($0, $2, 2), $2
	sub    $2     , $3
	mov    $3       , %ecx
	shl    $$17         , $3
	sub    $1       , $3
	sar    $$31         , $3
	sub    %ecx       , $2
	and    $3       , $2
	add    %ecx       , $2
	shl    $$17         , %ecx
	and    $3       , %ecx
	sub    %ecx       , $1
	xor    $3       , $0
	movzbl _ff_h264_norm_shift($2), %ecx
	shl    %cl        , $2
	movzbl _ff_h264_mlps_state+128($0), $3
	mov    ${3:b}   , ($4)
	shl    %cl        , $1
	test   ${1:w}   , ${1:w}
	 jnz   1f
	mov ${8:a}($5), %ecx
	movzwl (%ecx)     , $3
	bswap  $3
	shr    $$15         , $3
	sub    $$0xFFFF     , $3
	add    $$2          , %ecx
	mov    %ecx   , ${8:a}($5)
	lea    -1($1)   , %ecx
	xor    $1       , %ecx
	shr    $$15         , %ecx
	movzbl _ff_h264_norm_shift(%ecx), %ecx
	neg    %ecx
	add    $$7          , %ecx
	shl    %cl        , $3
	add    $3       , $1
	1:
	movl $2, ${6:a}($5)
	movl $1, ${7:a}($5)
	> [sideeffect], $0:[regdef-ec], %vreg5942<earlyclobber,def>,
$1:[regdef-ec], %vreg3438<earlyclobber,def,dead>, $2:[regdef-ec],
%vreg3439<earlyclobber,def,dead>, $3:[regdef-ec],
%vreg3440<earlyclobber,def,dead>, $4:[reguse], %vreg3441<kill>,
$5:[reguse], %vreg392, $6:[imm], 4, $7:[imm], 0, $8:[imm], 16,
$9:[clobber], %ECX<earlyclobber,imp-def,dead>, $10:[clobber],
%EFLAGS<earlyclobber,imp-def,dead>, <<badref>>;
GR32_ABCD:%vreg5942,%vreg3440
GR32:%vreg3438,%vreg3439,%vreg3441,%vreg392
dbg:libavcodec/x86/cabac.h:93:5 @[ libavcodec/cabac.h:340:5 @[
libavcodec/h264_cabac.c:1726:13 @[ libavcodec/h264_cabac.c:1737:5 @[
libavcodec/h264_cabac.c:1762:5 @[ libavcodec/h264_cabac.c:2322:21 ] ]
] ] ]


11. Tried removing -fomit-frame-pointer from original command and ran
clang -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -DHAVE_AV_CONFIG_H
-std=c99 -mdynamic-no-pic -fPIC -g -Wdeclaration-after-statement -Wall
-Wno-parentheses -Wno-switch -Wdisabled-optimization -Wpointer-arith
-Wredundant-decls -Wno-pointer-sign -Wcast-qual -Wwrite-strings
-Wtype-limits -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast
-O3 -fno-math-errno -fno-signed-zeros -mllvm -stack-alignment=16
-Qunused-arguments  -MMD -c -o libavcodec/h264_cabac.o
libavcodec/h264_cabac.c

Resulted in:
fatal error: error in backend: Ran out of registers during register allocation!
Cannot allocate: %vreg5942,inf = [162608u,162616d:0)  0 at 162608u
Please check your inline asm statement for invalid constraints:
INLINEASM <es:movl ${6:a}($5), $2
	movl ${7:a}($5), $1
	movzbl ($4)    , $0
	mov    $2     , $3
	and    $$0xC0       , $2
	movzbl _ff_h264_lps_range($0, $2, 2), $2
	sub    $2     , $3
	mov    $3       , %ecx
	shl    $$17         , $3
	sub    $1       , $3
	sar    $$31         , $3
	sub    %ecx       , $2
	and    $3       , $2
	add    %ecx       , $2
	shl    $$17         , %ecx
	and    $3       , %ecx
	sub    %ecx       , $1
	xor    $3       , $0
	movzbl _ff_h264_norm_shift($2), %ecx
	shl    %cl        , $2
	movzbl _ff_h264_mlps_state+128($0), $3
	mov    ${3:b}   , ($4)
	shl    %cl        , $1
	test   ${1:w}   , ${1:w}
	 jnz   1f
	mov ${8:a}($5), %ecx
	movzwl (%ecx)     , $3
	bswap  $3
	shr    $$15         , $3
	sub    $$0xFFFF     , $3
	add    $$2          , %ecx
	mov    %ecx   , ${8:a}($5)
	lea    -1($1)   , %ecx
	xor    $1       , %ecx
	shr    $$15         , %ecx
	movzbl _ff_h264_norm_shift(%ecx), %ecx
	neg    %ecx
	add    $$7          , %ecx
	shl    %cl        , $3
	add    $3       , $1
	1:
	movl $2, ${6:a}($5)
	movl $1, ${7:a}($5)
	> [sideeffect], $0:[regdef-ec], %vreg5942<earlyclobber,def>,
$1:[regdef-ec], %vreg3438<earlyclobber,def,dead>, $2:[regdef-ec],
%vreg3439<earlyclobber,def,dead>, $3:[regdef-ec],
%vreg3440<earlyclobber,def,dead>, $4:[reguse], %vreg3441<kill>,
$5:[reguse], %vreg392, $6:[imm], 4, $7:[imm], 0, $8:[imm], 16,
$9:[clobber], %ECX<earlyclobber,imp-def,dead>, $10:[clobber],
%EFLAGS<earlyclobber,imp-def,dead>, <<badref>>;
GR32_ABCD:%vreg5942,%vreg3440
GR32:%vreg3438,%vreg3439,%vreg3441,%vreg392
dbg:libavcodec/x86/cabac.h:93:5 @[ libavcodec/cabac.h:340:5 @[
libavcodec/h264_cabac.c:1726:13 @[ libavcodec/h264_cabac.c:1737:5 @[
libavcodec/h264_cabac.c:1762:5 @[ libavcodec/h264_cabac.c:2322:21 ] ]
] ] ]


12. Tried replacing -fomit-frame-pointer with -fno-omit-frame-pointer
and ran clang -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7"
-D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC
-DHAVE_AV_CONFIG_H -std=c99 -mdynamic-no-pic -fno-omit-frame-pointer
-fPIC -g -Wdeclaration-after-statement -Wall -Wno-parentheses
-Wno-switch -Wdisabled-optimization -Wpointer-arith -Wredundant-decls
-Wno-pointer-sign -Wcast-qual -Wwrite-strings -Wtype-limits -Wundef
-Wmissing-prototypes -Wno-pointer-to-int-cast -O3 -fno-math-errno
-fno-signed-zeros -mllvm -stack-alignment=16 -Qunused-arguments  -MMD
-c -o libavcodec/h264_cabac.o libavcodec/h264_cabac.c

Resulted in:
fatal error: error in backend: Ran out of registers during register allocation!
Cannot allocate: %vreg5942,inf = [162608u,162616d:0)  0 at 162608u
Please check your inline asm statement for invalid constraints:
INLINEASM <es:movl ${6:a}($5), $2
	movl ${7:a}($5), $1
	movzbl ($4)    , $0
	mov    $2     , $3
	and    $$0xC0       , $2
	movzbl _ff_h264_lps_range($0, $2, 2), $2
	sub    $2     , $3
	mov    $3       , %ecx
	shl    $$17         , $3
	sub    $1       , $3
	sar    $$31         , $3
	sub    %ecx       , $2
	and    $3       , $2
	add    %ecx       , $2
	shl    $$17         , %ecx
	and    $3       , %ecx
	sub    %ecx       , $1
	xor    $3       , $0
	movzbl _ff_h264_norm_shift($2), %ecx
	shl    %cl        , $2
	movzbl _ff_h264_mlps_state+128($0), $3
	mov    ${3:b}   , ($4)
	shl    %cl        , $1
	test   ${1:w}   , ${1:w}
	 jnz   1f
	mov ${8:a}($5), %ecx
	movzwl (%ecx)     , $3
	bswap  $3
	shr    $$15         , $3
	sub    $$0xFFFF     , $3
	add    $$2          , %ecx
	mov    %ecx   , ${8:a}($5)
	lea    -1($1)   , %ecx
	xor    $1       , %ecx
	shr    $$15         , %ecx
	movzbl _ff_h264_norm_shift(%ecx), %ecx
	neg    %ecx
	add    $$7          , %ecx
	shl    %cl        , $3
	add    $3       , $1
	1:
	movl $2, ${6:a}($5)
	movl $1, ${7:a}($5)
	> [sideeffect], $0:[regdef-ec], %vreg5942<earlyclobber,def>,
$1:[regdef-ec], %vreg3438<earlyclobber,def,dead>, $2:[regdef-ec],
%vreg3439<earlyclobber,def,dead>, $3:[regdef-ec],
%vreg3440<earlyclobber,def,dead>, $4:[reguse], %vreg3441<kill>,
$5:[reguse], %vreg392, $6:[imm], 4, $7:[imm], 0, $8:[imm], 16,
$9:[clobber], %ECX<earlyclobber,imp-def,dead>, $10:[clobber],
%EFLAGS<earlyclobber,imp-def,dead>, <<badref>>;
GR32_ABCD:%vreg5942,%vreg3440
GR32:%vreg3438,%vreg3439,%vreg3441,%vreg392
dbg:libavcodec/x86/cabac.h:93:5 @[ libavcodec/cabac.h:340:5 @[
libavcodec/h264_cabac.c:1726:13 @[ libavcodec/h264_cabac.c:1737:5 @[
libavcodec/h264_cabac.c:1762:5 @[ libavcodec/h264_cabac.c:2322:21 ] ]
] ] ]



Hope that was thorough enough ;-). Looking forward to your other ideas. Thanks!




On Thu, Nov 24, 2011 at 2:19 AM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Simon Daniels <simondaniels23 at ...> writes:
>
>> Thanks guys but omitting -fomit-frame-pointer in the last gcc call or
>> replacing it with -fno-omit-frame-pointer resulted in the same error
>> (trying both gcc and clang).
>
> [...]
>
>> make V=1 of clang is:
>> clang -m32 -I. -I"/Users/user/Downloads/ffmpeg-0.8.7" -D_ISOC99_SOURCE
>> -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -DHAVE_AV_CONFIG_H
>> -std=c99 -mdynamic-no-pic -fomit-frame-pointer -fPIC -g
>> -Wdeclaration-after-statement -Wall -Wno-parentheses -Wno-switch
>> -Wdisabled-optimization -Wpointer-arith -Wredundant-decls
>> -Wno-pointer-sign -Wcast-qual -Wwrite-strings -Wtype-limits -Wundef
>> -Wmissing-prototypes -Wno-pointer-to-int-cast -O3 -fno-math-errno
>> -fno-signed-zeros -mllvm -stack-alignment=16 -Qunused-arguments  -MMD
>> -c -o libavcodec/h264_cabac.o libavcodec/h264_cabac.c
>
> This does not look as if you omitted -fomit-frame-pointer or replaced it with
> -fno-omit-frame-pointer ;-(
>
> Please:
> Configure with one of the mentioned configure lines (either gcc or clang, it is
> possible that one of them fails at another point in the compilation, to save
> time you can test this preliminary with configure --disable-decoder=h264)
>
> Run make (it fails)
>
> Run make V=1
>
> Copy everything from "gcc"/"clang" to "libavcodec/h264_cabac.c" and paste it
> into your shell. Add -fno-omit-frame-pointer to the end (this should be
> sufficient since iirc later compiling options overwrite earlier ones) / remove
> -fomit-frame-pointer from the pasted command (this may actually not work because
> I believe -O3 implies -fomit-frame-pointer) / replace -fomit-frame-pointer with
> -fno-omit-frame-pointer. Press enter. If the compilation does not succeed,
> report back, there are other things you can try.
>
> Run make.
>
> Carl Eugen
>
> PS: Please use current git head, the releases are only for distributors, and I
> suspect you are a user.
>
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>


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