[x264-devel] Re: Build issue

[David Rosenstiehl]

Thanks Peter,

the patch worked, and I renamed the link by hand afterwards.

Now on to the following :)

David.

On Dec 8, 2006, at 9:53 PM, Peter Grayson wrote:

> On 12/8/06, David Rosenstiehl <trendywanabee at free.fr> wrote:
>> Ok, so I downloaded the latest xcode this night, and now ./configure
>> && make works.
>>
>> Except that if I do a ./configure --enable-shared, it doesn't :
>>
>> nasm -O2 -f macho -DPREFIX -Icommon/i386/ -o common/i386/deblock-a.o
>> common/i386/deblock-a.asm
>> gcc -shared -o libx264.so.54 common/mc.o common/predict.o common/
>> pixel.o common/macroblock.o common/frame.o common/dct.o common/cpu.o
>> common/cabac.o common/common.o common/mdate.o common/csp.o common/
>> set.o common/quant.o encoder/analyse.o encoder/me.o encoder/
>> ratecontrol.o encoder/set.o encoder/macroblock.o encoder/cabac.o
>> encoder/cavlc.o encoder/encoder.o encoder/eval.o common/i386/mc-c.o
>> common/i386/predict-c.o common/i386/dct-a.o common/i386/cpu-a.o
>> common/i386/pixel-a.o common/i386/mc-a.o common/i386/mc-a2.o common/
>> i386/predict-a.o common/i386/pixel-sse2.o common/i386/quant-a.o
>> common/i386/deblock-a.o -Wl,-soname,libx264.so.54 -lm -lmx - 
>> lpthread -s
>> i686-apple-darwin8-gcc-4.0.1: unrecognized option '-shared'
>> /usr/bin/ld: unknown flag: -soname
>> collect2: ld returned 1 exit status
>> make: *** [libx264.so.54] Error 1
>>
>> Any idea on this one ?
>
> I have run into this one also. The x264 has a number of problems
> surrounding building as a dynamic library on mac. The primary one is
> the one you ran into -- on mac, the correct gcc option to build a
> shared library is "-dynamic" not "-shared". But that's just the tip of
> the iceberg.
>
> The next problem is that "-fno-common" is needed to make the link  
> step work.
>
> Also, it seems that -fPIC must be used when building a dynamic
> library, but the configure script does not enforce this dependency.
>
> The other obvious problem is that the library is called libx264.so.54.
> On mac, the library should be called libx264.54.dylib and the symlink
> libx264.dylib. The dynamic link editor (dyld) won't find the library.
>
> Fixing this requires changes to the Makefile and configure script. I
> have a patch that partially resolves this issue. I did not yet address
> the symlink being ill-named.
>
> Pete
> <x264-darwin-build.patch>

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