Steph We had a Skype call yesterday with JB, and we made progress. The problem is I have several libraries, and it was not easy to find because they don’t export symbols and use pkg-config.
See you in Cambridge Annick Le 15 août 2014 à 12:36, stepharo <steph...@free.fr> a écrit : > Annick > > FFI can call a function but it needs to know where is your library. > > Stef > > On 13/8/14 15:46, Annick Fron wrote: >> I want to interface some pharo code with gstreamer. But gstreamer does not >> come up with a dylib, it requires compilation flags for instance for a C >> program. >> The compile options are : >> -pthread -I/usr/include/gstreamer-1.0 -I/usr/include/glib-2.0 >> -I/usr/lib/i386-linux-gnu/glib-2.0/include -lgstreamer-1.0 -lgobject-2.0 >> -lglib-2.0 >> >> so if I don’t know which module to use in FFI. If I put >> /usr/lib/gstreamer-1.0 >> I get an error « module not found ». >> Since it is handled by pragmas it is very difficult to debug. >> >> Annick >> Le 13 août 2014 à 13:11, Clément Bera <bera.clem...@gmail.com> a écrit : >> >>> I don't understand, do you want to compile your library using FFI or do you >>> want to bind a library compiled your way with FFI ? >>> >>> If you want to compile your library using FFI, then use OSProcess to run >>> the compilation line you showed. >>> >>> If you want to bind a library compiled your way with FFI, the easiest way >>> is to compile the C files as a dylib with something like: >>> >>> gcc -shared -m32 -Wall helloworld.c -o helloworld.dylib $(pkg-config >>> --cflags --libs gstreamer-1.0) >>> >>> (replace .dylib by .so or .dll if you're on windows or on Mac). >>> Then you can bind the dynamic library generated with FFI. I am not sure >>> about the FFI syntax but with NativeBoost it would look like: >>> Integer>>fib4NB >>> <primitive: #primitiveNativeCall module: #NativeBoostPlugin error: >>> errorCode> >>> ^ self >>> nbCall: #( int functionToCall (int self) ) >>> module: '/Users/myName/Desktop/helloWorld.dylib' >>> >>> Regards, >>> >>> Clement >>> >>> >>> 2014-08-13 11:55 GMT+02:00 Annick Fron <i...@afceurope.com>: >>> Hi, >>> >>> I would like to compile a FFI program but the compiling implies compile >>> flags like in the following : >>> >>> gcc -Wall helloworld.c -o helloworld $(pkg-config --cflags --libs >>> gstreamer-1.0) >>> >>> How do I do this with FFI ? >>> >>> Annick >>> >> >
