Hello, I try to generate the Luyten release of a library combination with the tool "g++ 4.7.2" on my openSUSE Tumbleweed system. I wonder about the following results here. https://sourceforge.net/tracker/?func=detail&atid=989749&aid=3603407&group_id=204472 https://mail.gnome.org/archives/ekiga-devel-list/2013-February/msg00018.html elfring@Sonne:~/Projekte/OpalVoip/OPAL/3.10.9> ./configure --disable-libavcodec ... checking PTLIB has expat... yes checking PTLIB has video... no ... Excerpt from ~/Projekte/OpalVoip/OPAL/3.10.9/config.log: ... /usr/local/lib64/libpt_s.a(vsdl.o): In function `_GLOBAL__sub_I_vsdl.cxx': vsdl.cxx:(.text.startup+0x42): undefined reference to `PPlugin_PVideoInputDevice_Application_link()' /usr/local/lib64/libpt_s.a(vfakeio.o): In function `_GLOBAL__sub_I_vfakeio.cxx': vfakeio.cxx:(.text.startup+0x42): undefined reference to `PPlugin_PVideoInputDevice_Application_link()' ... elfring@Sonne:~/Projekte/OpalVoip/OPAL/Probe> cat Video1.cpp #define PACKAGE_NAME "" #define PACKAGE_TARNAME "" #define PACKAGE_VERSION "" #define PACKAGE_STRING "" #define PACKAGE_BUGREPORT "" #define PACKAGE_URL "" #define STDC_HEADERS 1 #define OPAL_MAJOR 3 #define OPAL_MINOR 10 #define OPAL_BUILD 9 #define OPAL_VERSION "3.10.9" #define OPAL_PLUGIN_DIR "/usr/local/lib64/opal-3.10.9" #define OPAL_PTLIB_SSL 1 #define OPAL_PTLIB_ASN 1 #define OPAL_PTLIB_EXPAT 1 #include <ptbuildopts.h> #include <ptlib.h> #include <ptlib/video.h> int main(void) { PVideoChannel vc; return 0; } elfring@Sonne:~/Projekte/OpalVoip/OPAL/Probe> LANG=C g++ -o Video1 -Wall -Wextra -Wstrict-aliasing -Wfloat-equal -Wno-comment -Wno-unused -Winit-self -Wno-missing-field-initializers -Wreorder -felide-constructors -fexceptions -fPIC -DP_64BIT -DPTRACING=1 -D_REENTRANT -D_GNU_SOURCE=1 -I/usr/local/include -I/usr/include/SDL -L/usr/local/lib64 -lpt_s -lrt -lsasl2 -lldap -llber -lldap_r -lssl -lcrypto -lexpat -llua -lSDL -lpthread -lodbc -lresolv -ldl Video1.cpp /tmp/ccc6uWN0.o: In function `main': Video1.cpp:(.text+0x17): undefined reference to `PVideoChannel::PVideoChannel()' Video1.cpp:(.text+0x2b): undefined reference to `PVideoChannel::~PVideoChannel()' /tmp/ccc6uWN0.o: In function `__static_initialization_and_destruction_0(int, int)': Video1.cpp:(.text+0x8c): undefined reference to `PFactoryLoader::PluginLoaderStartup_link()' Video1.cpp:(.text+0x97): undefined reference to `PPlugin_PVideoInputDevice_FakeVideo_link()' Video1.cpp:(.text+0xa2): undefined reference to `PPlugin_PVideoInputDevice_Application_link()' Video1.cpp:(.text+0xad): undefined reference to `PPlugin_PVideoInputDevice_FFMPEG_link()' Video1.cpp:(.text+0xb8): undefined reference to `PPlugin_PVideoInputDevice_YUVFile_link()' Video1.cpp:(.text+0xc3): undefined reference to `PPlugin_PVideoOutputDevice_SDL_link()' collect2: error: ld returned 1 exit status I find it also especially strange that the reduced command parameter set (deletion of duplicated options and preprocessor symbols) shows differences in the error messages. I would appreciate your advices. Regards, Markus
