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• frenet January 3, 2012 3:32 PM PST    Linking problems with IPP 7 in Ubuntu 11.10   I'm moving from IPP6 to IPP7 and am having issues when linking an application to my shared object (which links to the ipp libraries). I had similar problems with IPP6 (http://software.intel.com/en-us/forums/showthread.php?t=82491) but now am having issues on both 32 and 64-bit linux and I cannot seem to resolve this the same way.  I am statically linking to the ipp, umc & uic libraries. I am using IPP 7.0.4.191 and have downloaded the 7.05.059 sample code. I am using g++. I can build my own shared object that statically links to ipp and umc, but when I try to build an application that links to my shared object, I get link errors. Originally I was getting the following errors when building the application (first few errors):   /usr/bin/ld: warning: libiomp5.so, needed by ../../lib/libfrenet .so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libintlc.so.5, needed by ../../lib/libfrenet .so, not found (try using -rpath or -rpath-link) /usr/bin/ld: warning: libimf.so, needed by ../../lib/libfrenet .so, not found (try using -rpath or -rpath-link) ../../lib/libfrenet .so: undefined reference to `omp_get_max_threads@VERSION' ../../lib/libfrenet .so: undefined reference to `GOMP_parallel_sections_start@VERSION' ../../lib/libfrenet .so: undefined reference to `omp_init_lock@VERSION' ../../lib/libfrenet .so: undefined reference to `__kmpc_barrier@VERSION' I then set my LD_LIBRARY_PATH to point to the directory containing libiomp, libintlc and libimf and now get the following error when building my app: /opt/intel/ipp/7.0.4.191/compiler/lib/ia32/libiomp5.so: undefined reference to `pthread_atfork' I do have -lpthread specified for both the shared object and the application, but the error still occurs. Below is the link info for my shared object: UIC_LIBS = "${UIC_IMAGE_DIR}/_bin/$(UIC_LIB_ARCH)/lib/uic_core_l.a" \            "${UIC_IMAGE_DIR}/_bin/$(UIC_LIB_ARCH)/lib/uic_io_l.a" \    "${UIC_IMAGE_DIR}/_bin/$(UIC_LIB_ARCH)/lib/uic_jpeg_enc_l.a" \    "${UIC_IMAGE_DIR}/_bin/$(UIC_LIB_ARCH)/lib/uic_jpeg_dec_l.a" \    "${UIC_IMAGE_DIR}/_bin/$(UIC_LIB_ARCH)/lib/uic_jpeg_common_l.a"  UMC_LIBS = "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libmpeg4_mux.a" \            "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libscene_analyzer.a" \    "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libh264_enc.a" \    "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libcolor_space_converter.a" \      "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libumc_io.a" \        "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libmedia_buffers.a" \    "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libcommon.a" \    "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libumc.a" \    "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libvm_plus.a" \       "${UMC_AVCODEC_DIR}/_bin/$(UMC_LIB_ARCH)/lib/libvm.a" IPP_STATIC_LIBS = -L/work/netcdrom/Intel/IPP/7.0.4.191/lib/$(IPP_LIB_ARCH) \                                         -lippch_t \ -lippdc_t \ -lippcc_t \ -lippcv_t \ -lippj_t  \ -lippvc_t \ -lippi_t  \ -lipps_t  \ -lippcore_t   IPP_SHARED_LIBS = -L /opt/intel/ipp/7.0.4.191/compiler/lib/$(IPP_LIB_ARCH) -liomp5 -lintlc -limf LIBS = -lraw1394 -lrt ${UIC_LIBS} ${UMC_LIBS} ${IPP_STATIC_LIBS} ${IPP_SHARED_LIBS} ${BOOST_LIB} -lpthread Thanks for any help on this.   Chao Y (Intel) January 4, 2012 10:27 PM PST Rate   #1 Linking problems with IPP 7 in Ubuntu 11.10 Hello, It looks that the code is threaded with GNU OpenMP libraries, and the JPEG sample code is threaded at the high level sample. So I suggest you linking with non threaded Intel IPP library. Change:    -lippch_t \     -lippdc_t \     -lippcc_t \     -lippcv_t \     -lippj_t \     -lippvc_t \     -lippi_t \     -lipps_t \     -lippcore_t to:     -lippch_l \     -lippdc_l \     -lippcc_l \     -lippcv_l \     -lippj_l \     -lippvc_l \     -lippi_l \     -lipps_l \     -lippcore_l It does not need to add the -liomp5, but added the -lgomp -lpthread at the linkage frag. Thanks, Chao

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