id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
2016,Support libopenjpeg 2.0.0,KSHawkEye,,"I'm trying to compile the latest FFmpeg git with openjpeg 2.0.0 but keep getting an undefined reference to opj_version.

I have already asked for help with this issue here: [http://code.google.com/p/openjpeg/issues/detail?id=200]
Here: [http://sourceforge.net/mailarchive/message.php?msg_id=30209438]

And one of my users on my forum posted about it here: [http://ffmpeg.zeranoe.com/forum/viewtopic.php?f=5&t=674&hilit=opj_version]

I think openjpeg is failing to compile in static and is searching for some .dll file when FFmpeg tries to link to it.

Some code that ''does'' compile with opj_version is:

{{{
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <openjpeg.h>

int main(void)
{
    printf(""OPJ2 version is %s\n"",opj_version());

    return 0;
}
}}}

Though I have no idea why that succeeds, and FFmpeg's test code:

{{{
extern int opj_version();
int main(void){ opj_version(); }
}}}

fails.

This command: $ i686-w64-mingw32-nm ./libopenjp2.a | grep opj_version

Returns:
00000228 T _opj_version@0

So it looks like it is in the lib, but just keeps failing.

Openjpeg 2.0.0 compiled without error.

It also looks like FFmpeg is trying to test the lib with:

{{{
BEGIN /tmp/ffconf.ns4yWT3Y.c
    1	extern int opj_version();
    2	int main(void){ opj_version(); }
END /tmp/ffconf.ns4yWT3Y.c
i686-w64-mingw32-gcc -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -U__STRICT_ANSI__ -std=c99 -fomit-frame-pointer -c -o /tmp/ffconf.ohUKczd4.o /tmp/ffconf.ns4yWT3Y.c
i686-w64-mingw32-gcc -Wl,--as-needed -o /tmp/ffconf.hJciF3wT.exe /tmp/ffconf.ohUKczd4.o -lopenjpeg -lm -lz
/tmp/ffconf.ohUKczd4.o:ffconf.ns4yWT3Y.c:(.text+0xc): undefined reference to `opj_version'
collect2: error: ld returned 1 exit status
ERROR: libopenjpeg not found
}}}


I'm happy to provide any further needed information to help get this fixed.",enhancement,open,wish,avcodec,git-master,,libopenjpeg,,,,0,0