I was compiling Mplayer(uses mmpeg) for iPhone. Thanks for your gas-prepocessor. Its a life saver.
I think that in the comment removing section instead of
s/$comm.//x;
should be
s/$comm./$comm/x;
It will remove the comment text but leave the @ mark for the sake of things like

define ELF @

and stuff. I did it in my local copy.
Thanks,
[email protected]
P.S
I also commented out the eabi_atribute again. Is that Ok?

Hi,

When I try to configure with latest gas-prepocessor.pl with latest ffmpeg source, it is giving the following error at line 35
Unable to identify target architecture
I guess, what you are comparing with /arm/ is wrong.
($gcc_cmd[0] =~ /arm/) , as here the gcc_com[0] is coming as "/developer/..../gcc"

If gas-preprocessor.pl is invoked with a gcc command line that includes the -fastf option the assembled object file will have a mach-o header but no code, and there will be no error message.

It is possible other gcc options will be discovered to be incompatible with the -E option.

A possible fix may look like this:

@preprocess_c_cmd = grep(!/-fastf/, @preprocess_c_cmd);

In 0.7.x and 0.8.x, if you use avcodec_decode_audio3 for decoding audio, you may get wrong audio data.
I can't find this solution. I don't know why building wrong or bug.
Do you know this solution and reason?

Maybe I use it in a wrong way but I get this error:

unhandled .if varient at /usr/bin/gas-preprocessor.pl line 199, line 145.
make: *** [libavcodec/arm/mpegaudiodsp_fixed_armv6.o] Error 29

using this configure:
./configure --enable-cross-compile --arch=arm --target-os=darwin --cc='/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -arch armv7' --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk --cpu=cortex-a8 --enable-pic

The -MT option is used to specify the name of the make target that will be written to the file indicated by -MF. "-" is not a proper make target, thus "-MT anything.o" should not be changed to "-MT -".

A fix for this problem may look like this:

remove this line:

@preprocess_c_cmd = map { /.o$/ ? "-" : $_ } @preprocess_c_cmd;

add these lines:

Want to change "-o <anything.o>" into "-o -"

but it is not correct to change "-MT <anything.o>" into "-MT - "

my $i;
my $o_flag = 0;
for ($i = 1; $i < @preprocess_c_cmd; $i++) {
if ($preprocess_c_cmd[$i] eq "-o") {
$o_flag = 1;
} elsif ($o_flag) {
$o_flag = 0;
if ($preprocess_c_cmd[$i] =~ /.o$/) {
$preprocess_c_cmd[$i] = "-";
}
}
}

CC libavcodec/audioconvert.o
error: invalid operand in inline asm: 'adds $1, ${2:R}, ${2:Q}, lsr #31
mvnne $1, #1<<31
eorne $0, $1, ${2:R}, asr #31
'
make: *** [libavcodec/audioconvert.o] Error 1

iOS5 sdk, LION-10.7.2

libavcodec/arm/mpegaudiodsp_fixed_armv6.S:126:bad instruction strh_post r10,r3,r4' libavcodec/arm/mpegaudiodsp_fixed_armv6.S:236:bad instructionstrh_post r10,r3,r12'
libavcodec/arm/mpegaudiodsp_fixed_armv6.S:243:bad instruction `strh_dpost r11,r5,r12'

Probably it could be fold into the macro support but I'm having an hard time to properly do that myself.

(irpc usage had been recently introduced in libav)

Hi,

When I running the

./configure --enable-cross-compile --arch=arm --target-os=darwin
--cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor.pl
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc'
--sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk --cpu=arm1176jzf-s --extra-cflags='-arch
armv6' --extra-ldflags='-arch armv6'

script I getting the error: “Unrecognized input filetype at /bin/sh line 23″

Pls help me.

Thanks,
Eyal.

Self-contained build script to reproduce:
https://gist.github.com/swisspol/8498104

Build script output:
https://gist.github.com/swisspol/8498120

And where it fails:

jsimd_arm_neon.S:270:16: error: invalid operand for instruction
      ldrd r4, [COEF_BLOCK, #(-96 + 2 * (4 + 1 * 8))]
               ^
jsimd_arm_neon.S:276:16: error: invalid operand for instruction
      ldrd r4, [COEF_BLOCK, #(-96 + 2 * (4 + 2 * 8))]
               ^
jsimd_arm_neon.S:283:16: error: invalid operand for instruction
      ldrd r4, [COEF_BLOCK, #(-96 + 2 * (4 + 3 * 8))]
               ^
jsimd_arm_neon.S:291:16: error: invalid operand for instruction
      ldrd r4, [COEF_BLOCK, #(-96 + 2 * (4 + 4 * 8))]
               ^
jsimd_arm_neon.S:299:16: error: invalid operand for instruction
      ldrd r4, [COEF_BLOCK, #(-96 + 2 * (4 + 5 * 8))]
               ^
jsimd_arm_neon.S:306:16: error: invalid operand for instruction
      ldrd r4, [COEF_BLOCK, #(-96 + 2 * (4 + 6 * 8))]
               ^
jsimd_arm_neon.S:313:16: error: invalid operand for instruction
      ldrd r4, [COEF_BLOCK, #(-96 + 2 * (4 + 7 * 8))]
               ^
jsimd_arm_neon.S:321:16: error: invalid operand for instruction
      ldrd r4, [COEF_BLOCK, #(-96 + 2 * (4 + 0 * 8))]

I asked about the issue on the libjpeg-turbo mailing list and someone suggested to ask here:
http://sourceforge.net/p/libjpeg-turbo/mailman/message/31870599/

full command used was:
gas-preprocessor.pl arm-linux-androideabi-gcc -I. -I./ -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -O3 -Wall -mthumb -pipe -fpic -fasm -finline-limit=300 -ffast-math -fstrict-aliasing -Werror=strict-aliasing -fmodulo-sched -fmodulo-sched-allow-regmoves -Wno-psabi -Wa,--noexecstack -DANDROID -DNDEBUG -march=armv7-a -mthumb -mthumb-interwork -mfpu=neon -mfloat-abi=softfp -mvectorize-with-neon-quad -march=armv7-a -fPIC -g -MMD -MF libavcodec/arm/aacpsdsp_neon.d -MT libavcodec/arm/aacpsdsp_neon.o -c -o libavcodec/arm/aacpsdsp_neon.o libavcodec/arm/aacpsdsp_neon.S

Error was:
libavcodec/arm/aacpsdsp_neon.S: Assembler messages:
libavcodec/arm/aacpsdsp_neon.S:320: Error: junk at end of line, first unrecognized character is f' libavcodec/arm/aacpsdsp_neon.S:321: Error: junk at end of line, first unrecognized character isf'
libavcodec/arm/aacpsdsp_neon.S:322: Error: junk at end of line, first unrecognized character is f' libavcodec/arm/aacpsdsp_neon.S:323: Error: junk at end of line, first unrecognized character isf'
libavcodec/arm/aacpsdsp_neon.S:324: Error: junk at end of line, first unrecognized character is `f'
make: *** [libavcodec/arm/aacpsdsp_neon.o] Error 1

Unfortunately not a lot of usage for this tool exists. Is this still working? What am i doing wrong?

How do you know about all of this stuff? I went through Computer Science but my knowledge of Compiling for difference architectures is weak.

I'm trying to get this working with pixman so I can compile it for iPhone. I'm getting errors when trying to compile all 3 of these files:
http://cgit.freedesktop.org/pixman/tree/pixman/pixman-arm-neon-asm.S
http://cgit.freedesktop.org/pixman/tree/pixman/pixman-arm-neon-asm-bilinear.S
http://cgit.freedesktop.org/pixman/tree/pixman/pixman-arm-simd-asm.S

For pixman-arm-neon-asm.S, I get this error: "Too many arguments to macro pixld_a at ./gas-preprocess.pl line 317, line 1128."

For pixman-arm-simd-asm.S I get:
pixman-arm-simd-asm.S:37Unknown pseudo-op: .altmacro
pixman-arm-simd-asm.S:150:FATA:Symbol fname already defined

And finally for pixman-arm-neon-asm-bilinear.S, I get these:
pixman-arm-neon-asm-bilinear.S:61:Unknown pseudo-op: .eabi_attribute
pixman-arm-neon-asm-bilinear.S:61:Rest of line ignored. 1st junk
character valued 49 (1).
pixman-arm-neon-asm-bilinear.S:62:Unknown pseudo-op: .eabi_attribute
pixman-arm-neon-asm-bilinear.S:62:Rest of line ignored. 1st junk
character valued 49 (1).
pixman-arm-neon-asm-bilinear.S:64:Unknown pseudo-op: .altmacro
pixman-arm-neon-asm-bilinear.S:629:Unknown pseudo-op: .error
pixman-arm-neon-asm-bilinear.S:629:Rest of line ignored. 1st junk
character valued 117 (u).
pixman-arm-neon-asm-bilinear.S:673:Can't relocate expression. Absolute
0 assumed.
pixman-arm-neon-asm-bilinear.S:677:bad instruction bilinear_process_last_pixel' pixman-arm-neon-asm-bilinear.S:686:Can't relocate expression. Absolute 0 assumed. pixman-arm-neon-asm-bilinear.S:688:bad instructionbilinear_process_two_pixels'
pixman-arm-neon-asm-bilinear.S:694:bad instruction
bilinear_process_pixblock_head' pixman-arm-neon-asm-bilinear.S:698:bad instruction bilinear_process_pixblock_tail_head'
pixman-arm-neon-asm-bilinear.S:702:bad instruction
bilinear_process_pixblock_tail' pixman-arm-neon-asm-bilinear.S:707:bad instructionbilinear_process_two_pixels'
pixman-arm-neon-asm-bilinear.S:711:bad instruction `bilinear_process_last_pixel'
pixman-arm-neon-asm-bilinear.S:628:FATAL:Symbol fname already defined.

All of these files compile just for using GCC for arm on other platforms (like Android). Could anyone suggest how to fix this tool, or suggest fixes to the source files to make them work with this tool?

Hy guys,

there is an issue compiling ffmpeg for ios with asm and neon support.
I tried with SDK 4.3, 5.0 and 5.1, but I always get the message "error: invalid operand in inline asm".
I know this error is related to the new GNU assembler.
Disabling asm is no option, because it will slow down the performance massivly.
I already read the related post (#16), but there is no solution.

PLEASE HELP!

Here is my building script:

BASEPATH=$PWD
PLATFORMPATH="/Applications/Xcode.app/Contents/Developer/Platforms"
IOSSDK=4.3


./configure \
--cc=${PLATFORMPATH}/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 \
--as='gas-preprocessor.pl ${PLATFORMPATH}/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2'
--sysroot="${PLATFORMPATH}/iPhoneOS.platform/Developer/SDKs/iPhoneOS${IOSSDK}.sdk" \
--target-os=darwin \
--arch=arm \
--cpu=cortex-a8 \
--extra-cflags="-w -arch armv7 -mfpu=neon " \
--extra-ldflags="-L${PLATFORMPATH}/iPhoneOS.platform/Developer/SDKs/iPhoneOS${IOSSDK}.sdk/usr/lib/system -arch armv7 -mfpu=neon -isysroot ${PLATFORMPATH}/iPhoneOS.platform/Developer/SDKs/iPhoneOS${IOSSDK}.sdk" \
--extra-cxxflags='-mno-apcs-stack-check -mfpu=neon -mvectorize-with-neon-quad' \
--disable-bzlib \
--disable-yasm \
--disable-vdpau \
--disable-vaapi \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffserver \
--disable-ffprobe \
--disable-filters \
--disable-bsfs \
--disable-doc \
--disable-debug \
--disable-encoders \
--disable-muxers \
--disable-protocols \
--disable-parsers \
--disable-demuxers \
--disable-decoders \
--enable-protocol=rtp \
--enable-protocol=udp \
--enable-parser=mpegvideo \
--enable-demuxer=rawvideo \
--enable-demuxer=mpegvideo \
--enable-demuxer=rtp \
--enable-demuxer=mpegts \
--enable-decoder=rawvideo \
--enable-decoder=mpeg1video \
--enable-decoder=mpeg2video \
--enable-decoder=mpegvideo \
--enable-cross-compile \
--enable-nonfree \
--enable-gpl \
--enable-version3 \
--enable-pic \
--enable-neon

In svn release 22404 of ffmpeg, a .macro defined inside another .macro has been added to libavcodec/arm/asm.S
After parsing the first and second .macro, then the inner .endm, gas-preprocessor dies with "ERROR: .endm without .macro" when it encounters the second .endm.

    .macro function name, export=0
    .macro endfunc
    # some code for endfunc
    .endm
     # some code for function
    .endm

Hi,

I am trying to run ./configure for version iOS5.1 like this:

./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-cross-compile --arch=arm --target-os=darwin --cc=/applications/xcode.app/contents/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /applications/xcode.app/contents/Developer/usr/bin/gcc' --sysroot=/applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk --cpu=cortex-a8 --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7 -isysroot /applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk' --enable-pic

And I am getting this error:

/applications/xcode.app/contents/Developer/usr/bin/gcc is unable to create an executable file.
C compiler test failed.

If you think configure made a mistake, make sure you are using the latest
version from SVN. If the latest version fails, report the problem to the
[email protected] mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.err" produced by configure as this will help
solving the problem.

Could somebody please indicate the right parameters?, thanks in advance.