[Mjpeg-users] Building Cross platform binaries

[Mark H. <mj...@si...>]

Hi all,

I've been using mjpeg tools under OSX for some time now.

  I have recently begun attempting to integrate the tools with Apple  
Core services.  However Xcode wants the mjpeg libraries to be  
universal or it won't link against them.

I have tried the path of forcing Xcode to only produce binaries for my  
platform, but that has proved fruitless.
I did resort to building the Cocoa application using gcc command line  
and then manually copying the additional resource files into the .app  
directory.  This is not really a satisfactory solution.

So now I have begun building mjpeg with universal binaries.
I have spent most of this evening getting lib jpeg 6b built with  
universal shared libraries and have had success.

However mjpeg tools have not been so friendly to cross compilation.

configure:  MJPEG tools 1.9.0 build configuration :
configure:
configure:   - X86 Optimizations:
configure:     - MMX/3DNow!/SSE enabled      : false
configure:   - arch/cpu compiler flags       : -march=pentium3 - 
mtune=pentium3
configure:   - video4linux recording/playback: false
configure:   - software MJPEG playback       : false
configure:   - Quicktime playback/recording  : false
configure:   - PNG input support             : false
configure:   - AVI MJPEG playback/recording  : true (always)
configure:   - libDV (digital video) support : false
configure:   - Gtk+ support for glav         : false
configure:
bash-3.2$ make
make  all-recursive
Making all in utils
if /bin/sh ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. - 
I. -I.. -I.. -I../utils    -march=pentium3 -mtune=pentium3 -arch ppc - 
arch ppc64 -arch i386 -arch x86_64 -g -Os -pipe -no-cpp-precomp -no- 
cpp-precomp -D_THREAD_SAFE  -Wall -Wunused -MT mjpeg_logging.lo -MD - 
MP -MF ".deps/mjpeg_logging.Tpo" -c -o mjpeg_logging.lo  
mjpeg_logging.c; \
	then mv -f ".deps/mjpeg_logging.Tpo" ".deps/mjpeg_logging.Plo"; else  
rm -f ".deps/mjpeg_logging.Tpo"; exit 1; fi
  gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I../utils -march=pentium3 - 
mtune=pentium3 -arch ppc -arch ppc64 -arch i386 -arch x86_64 -g -Os - 
pipe -no-cpp-precomp -no-cpp-precomp -D_THREAD_SAFE -Wall -Wunused -MT  
mjpeg_logging.lo -MD -MP -MF .deps/mjpeg_logging.Tpo -c  
mjpeg_logging.c  -fno-common -DPIC -o .libs/mjpeg_logging.o
gcc-4.0: -E, -S, -save-temps and -M options are not allowed with  
multiple -arch flags
make[3]: *** [mjpeg_logging.lo] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2


As you can see here it has attempted to tune for pentium3 and gcc  
spits it over command line options...

I would like to have universal binaries as I do use a mixture of PPC  
and Intel macs.

I am guessing to build universal binaries is going to require some  
serious hacking of the build scripts.  Can anyone help?

Mark