build failed uhd 4.8.0.0 with dpdk installed in dedicated path , CFLAGS not set with cmake

[KarimH22]

Hello

I tried to build uhd 4.8.0.0 and strangely the DPDK_CFLAGS are not added to build transport.
I ran cmake

PKG_CONFIG_PATH=/opt/dpdk/lib/x86_64-linux-gnu/pkgconfig/ cmake options

1. I got

uhd-4.8.0.0/host/lib/include/uhdlib/transport/dpdk/common.hpp:23:10: fatal error: rte_arp.h: No such file or directory
   23 | #include <rte_arp.h>
      |          ^~~~~~~~~~~

You pushed in host/lib/CMakeLists.txt
target_compile_options(uhd PRIVATE ${DPDK_CFLAGS})
but building with make VERBOSE=1
I dont see DPDK_CFLAGS

It is better to keep in
host/lib/transport/CMakeLists.txt

include_directories(${DPDK_INCLUDE_DIRS})

I have
cmake --version
cmake version 3.28.3

2. so adding the previous line I can see I still do not have DPDK_CFLAGS

Building CXX object lib/CMakeFiles/uhd_static.dir/transport/uhd-dpdk/dpdk_common.cpp.o
cd /tmp/uhd-4.8.0.0/host/build/lib && /usr/bin/c++ -DBOOST_ASIO_DISABLE_STD_EXPERIMENTAL_STRING_VIEW -DBOOST_ASIO_HAS_STD_STRING_VIEW -DBOOST_ERROR_CODE_HEADER_ONLY -DHAVE_CONFIG_H -DHAVE_DPDK -DUHD_LOG_CONSOLE_COLOR -DUHD_LOG_CONSOLE_LEVEL=2 -DUHD_LOG_FILE_LEVEL=2 -DUHD_LOG_MIN_LEVEL=1 -DUHD_STATIC_LIB -I/tmp/uhd-4.8.0.0/host/build/include -I/tmp/uhd-4.8.0.0/host/include -I/opt//boost/include -I/tmp/uhd-4.8.0.0/host/lib/include -I/tmp/uhd-4.8.0.0/host/build/lib/include -I/tmp/uhd-4.8.0.0/host/lib/deps/flatbuffers/include -I/tmp/uhd-4.8.0.0/host/build/lib/ic_reg_maps -I/tmp/uhd-4.8.0.0/host/lib/convert -I/tmp/uhd-4.8.0.0/host/build/lib/convert -I/tmp/uhd-4.8.0.0/host/lib/usrp -I/tmp/uhd-4.8.0.0/host/lib/usrp/common/ad9361_driver -I/tmp/uhd-4.8.0.0/host/lib/usrp/common -I/tmp/uhd-4.8.0.0/host/build/lib/transport/nirio/lvbitx -I/usr/include/libusb-1.0 -I/tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk -I/opt//dpdk/include -I/opt//libpcap/include -I/usr/include/libnl3 -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/tmp/uhd-4.8.0.0/host/lib/deps/rpclib/include -I/tmp/uhd-4.8.0.0/host/build/_cmrc/include -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -std=gnu++17 -fPIC   -Wall -Wextra -Wsign-compare -MD -MT lib/CMakeFiles/uhd_static.dir/transport/uhd-dpdk/dpdk_common.cpp.o -MF CMakeFiles/uhd_static.dir/transport/uhd-dpdk/dpdk_common.cpp.o.d -o CMakeFiles/uhd_static.dir/transport/uhd-dpdk/dpdk_common.cpp.o -c /tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk/dpdk_common.cpp
/tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk/dpdk_common.cpp: In constructor ‘uhd::transport::dpdk::dpdk_port::dpdk_port(uhd::transport::dpdk::port_id_t, size_t, uint16_t, uint16_t, rte_mempool*, rte_mempool*, std::string)’:
/tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk/dpdk_common.cpp:95:25: warning: ignoring return value of ‘int rte_eth_dev_info_get(uint16_t, rte_eth_dev_info*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  95 |     rte_eth_dev_info_get(_port, &dev_info);
     |     ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
/tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk/dpdk_common.cpp: In member function ‘void uhd::transport::dpdk::dpdk_ctx::init(const uhd::device_addr_t&)’:
/tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk/dpdk_common.cpp:566:33: warning: ignoring return value of ‘int rte_eth_link_get(uint16_t, rte_eth_link*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 566 |                 rte_eth_link_get(portid, &link);
     |                 ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
/tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk/dpdk_common.cpp: In member function ‘int uhd::transport::dpdk::dpdk_ctx::get_port_link_status(uhd::transport::dpdk::port_id_t) const’:
/tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk/dpdk_common.cpp:651:28: warning: ignoring return value of ‘int rte_eth_link_get_nowait(uint16_t, rte_eth_link*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
 651 |     rte_eth_link_get_nowait(portid, &link);
     |     ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
In file included from /usr/lib/gcc/x86_64-linux-gnu/14/include/immintrin.h:37,
                from /opt/dpdk/include/rte_rtm.h:8,
                from /opt/dpdk/include/rte_spinlock.h:9,
                from /opt/dpdk/include/rte_mempool.h:44,
                from /opt/dpdk/include/rte_mbuf.h:38,
                from /opt/dpdk/include/rte_ether.h:20,
                from /opt/dpdk/include/rte_arp.h:15,
                from /tmp/uhd-4.8.0.0/host/lib/include/uhdlib/transport/dpdk/common.hpp:23,
                from /tmp/uhd-4.8.0.0/host/lib/include/uhdlib/transport/dpdk/arp.hpp:8,
                from /tmp/uhd-4.8.0.0/host/lib/transport/uhd-dpdk/dpdk_common.cpp:9:
/usr/lib/gcc/x86_64-linux-gnu/14/include/tmmintrin.h: In function ‘void* rte_memcpy_generic(void*, const void*, size_t)’:
/usr/lib/gcc/x86_64-linux-gnu/14/include/tmmintrin.h:185:1: error: inlining failed in call to ‘always_inline’ ‘__m128i _mm_alignr_epi8(__m128i, __m128i, int)’: target specific option mismatch
 185 | _mm_alignr_epi8(__m128i __X, __m128i __Y, const int __N)
     | ^~~~~~~~~~~~~~~
In file included from /opt//dpdk/include/rte_mempool.h:50:
/opt/dpdk/include/rte_memcpy.h:515:25: note: called from here
 515 |         _mm_storeu_si128((__m128i *)(void *)((uint8_t *)dst + 7 * 16), _mm_alignr_epi8(xmm8, xmm7, offset));        \
     |         ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/dpdk/include/rte_memcpy.h:557:16: note: in expansion of macro ‘MOVEUNALIGNED_LEFT47_IMM’
 557 |     case 0x01: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x01); break;    \

[NI-LAm]

How did you install cmake? /opt look like it is not the DPDK package of your distribution. If the CFLAGS are empty there is something wrong with your DPDK installation. You can check the content of the DPDK variables in the CMakeCache.txt (they start with DPDK_) of your build folder. This is probably something to be asked in a DPDK forum.