Hi! The part of my problem is very specific and I don't know, that is a pjsip problem or not? So, this is my problem: I am trying to compile the siphon2 (pjsip base open source iPhone program) on simulator, because I don't have iphone device. But I don't have any result. My results: First, I do all steps on the http://saplogix.net/blog/?p=36 site. Next step I copy: BFavoritesEntry.h, ABFavoritesList.h files into the right place: /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.1.sdk/System/Library/Frameworks/AddressBookUI.framework/Headers My compile.sh: #!/bin/sh export DEV=/Developer/Platforms/iPhoneOS.platform/Developer export SDK=${DEV}/SDKs/iPhoneOS3.1.2.sdk pushd ${DEV}/usr/bin ln -s arm-apple-darwin9-gcc-4.0.1 arm-apple-darwin9-gcc ln -s arm-apple-darwin9-g++-4.0.1 arm-apple-darwin9-g++ ln -s ranlib arm-apple-darwin9-ranlib popd export PATH=${DEV}/usr/bin:${PATH} export CFLAGS="-O2 -arch armv6 -isysroot ${SDK}" export LDFLAGS="-O2 -arch armv6 -isysroot ${SDK}" export CPP="${DEV}/usr/bin/cpp" ./aconfigure --host=arm-apple-darwin9 --disable-speex-aec \ --disable-speex-codec --disable-l16-codec --disable-g722-codec \ --disable-ilbc-codec --disable-ssl make dep make ------------script end--------------- And now I have the following error when I try to compile Siphon2: ld: library not found for -lg729a I don't find the answer. I think I use the wrong architecture. Can somebody help me? I don't find the solution. Regards, Balazs