I'm currently not able to compile for the simulator. (SVN r I've a 64bit Mac running Snow Leopard. The error I'm getting is: ../src/pj/activesock.c: In function ?activesock_create_iphone_os_stream?: ../src/pj/activesock.c:146: error: ?kCFStreamNetworkServiceType? is unavailable (declared at /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CFNetwork.framework/Headers/CFSocketStream.h:256) ../src/pj/activesock.c:147: error: ?kCFStreamNetworkServiceTypeVoIP? is unavailable (declared at /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.2.sdk/System/Library/Frameworks/CFNetwork.framework/Headers/CFSocketStream.h:259) make[2]: *** [output/pjlib-arm-apple-darwin9/activesock.o] Error 1 make[1]: *** [pjlib] Error 2 make: *** [all] Error 1 My export statements are a little different, as ARCH is necessary to even compile, compared to the directions I'm doing the following: svn export http://svn.pjsip.org/repos/pjproject/trunk/ CONFIG_SITE=trunk/pjlib/include/pj/config_site.h echo $CONFIG_SITE touch $CONFIG_SITE echo "#define PJ_CONFIG_IPHONE 1" > $CONFIG_SITE echo "#include <pj/config_site_sample.h>" >> $CONFIG_SITE export ARCH="-arch i386" export DEVPATH=/Developer/Platforms/iPhoneSimulator.platform/Developer export CC=/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc cd trunk echo `pwd` ./configure-iphone make dep && make clean && make I've also tried export IPHONESDK=$DEVPATH/SDKs/iPhoneSimulator4.2.sdk Would love to hear if anyone got this working with Xcode4 Matt