Re: [dpdk-dev] [PATCH] mk: fix link to combined library

[Bruce Richardson <bruce.richardson@intel.com>]

On Wed, Dec 17, 2014 at 12:45:32AM +0100, Thomas Monjalon wrote:
> 2014-12-11 02:54, Hiroshi Shimamoto:
> > From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
> > 
> > The application should be linked to the single combined library in the
> > condition that both of CONFIG_RTE_BUILD_COMBINE_LIB and
> > CONFIG_RTE_BUILD_SHARED_LIB are enabled.
> > 
> > The current makefile generates an application that links to each library.
> > This patch fixes to link the single library.
> > 
> > Before
> > $ ldd x86_64-ivshmem-linuxapp-gcc/app/test
> > 	linux-vdso.so.1 =>  (0x00007fff232a1000)
> > 	librte_distributor.so => not found
> > 	librte_kni.so => not found
> > 	librte_ivshmem.so => not found
> > 	librte_pipeline.so => not found
> > 	librte_table.so => not found
> > 	librte_port.so => not found
> > 	librte_timer.so => not found
> > 	librte_hash.so => not found
> > 	librte_lpm.so => not found
> > 	librte_power.so => not found
> > 	librte_acl.so => not found
> > 	librte_meter.so => not found
> > 	librte_sched.so => not found
> > 	libm.so.6 => /lib64/libm.so.6 (0x00007fc638020000)
> > 	librt.so.1 => /lib64/librt.so.1 (0x00007fc637e18000)
> > 	librte_kvargs.so => not found
> > 	librte_mbuf.so => not found
> > 	librte_ip_frag.so => not found
> > 	libethdev.so => not found
> > 	librte_malloc.so => not found
> > 	librte_mempool.so => not found
> > 	librte_ring.so => not found
> > 	librte_eal.so => not found
> > 	librte_cmdline.so => not found
> > 	librte_cfgfile.so => not found
> > 	librte_pmd_bond.so => not found
> > 	libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fc637bfe000)
> > 	libdl.so.2 => /lib64/libdl.so.2 (0x00007fc6379fa000)
> > 	libintel_dpdk.so => not found
> > 	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fc6377dd000)
> > 	libc.so.6 => /lib64/libc.so.6 (0x00007fc63741c000)
> > 	/lib64/ld-linux-x86-64.so.2 (0x00007fc638330000)
> > 
> > After
> > $ ldd x86_64-ivshmem-linuxapp-gcc/app/test
> > 	linux-vdso.so.1 =>  (0x00007fffb79fe000)
> > 	librt.so.1 => /lib64/librt.so.1 (0x00007f0d8a971000)
> > 	libm.so.6 => /lib64/libm.so.6 (0x00007f0d8a66f000)
> > 	libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f0d8a458000)
> > 	libdl.so.2 => /lib64/libdl.so.2 (0x00007f0d8a254000)
> > 	libintel_dpdk.so => not found
> > 	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f0d8a037000)
> > 	libc.so.6 => /lib64/libc.so.6 (0x00007f0d89c76000)
> > 	/lib64/ld-linux-x86-64.so.2 (0x00007f0d8ab82000)
> > 
> > Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
> > Reviewed-by: Hayato Momma <h-momma@ce.jp.nec.com>
> 
> It is what I suggested to Sergio:
> 	http://dpdk.org/ml/archives/dev/2014-December/009116.html
> 
> Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
> 
> Applied
> 
> Thanks
> -- 
> Thomas

None of the example apps are compiling for me today, and git bisect indicates that
this patch is the culprit. I'm investigating, but if flagging it here in case 
someone else finds a fix faster than I do.

The error is due to the libraries being missing on the link command, with the
out-of-the-box configuration i.e. individual static libs.

/Bruce

make: Entering directory `/home/bruce/dpdk.org/examples/helloworld'
mkdir -p /home/bruce/dpdk.org/examples/helloworld/build
make -C /home/bruce/dpdk.org/examples/helloworld/build -f /home/bruce/dpdk.org/examples/helloworld/Makefile \
        S=/home/bruce/dpdk.org/examples/helloworld O=/home/bruce/dpdk.org/examples/helloworld/build SRCDIR=/home/bruce/dpdk.org/examples/helloworld
gcc -m64 -pthread  -march=native -DRTE_MACHINE_CPUFLAG_SSE -DRTE_MACHINE_CPUFLAG_SSE2 -DRTE_MACHINE_CPUFLAG_SSE3 -DRTE_MACHINE_CPUFLAG_SSSE3 -DRTE_MACHINE_CPUFLAG_SSE4_1 -DRTE_MACHINE_CPUFLAG_SSE4_2 -DRTE_MACHINE_CPUFLAG_AES -DRTE_MACHINE_CPUFLAG_PCLMULQDQ -DRTE_MACHINE_CPUFLAG_AVX -DRTE_COMPILE_TIME_CPUFLAGS=RTE_CPUFLAG_SSE,RTE_CPUFLAG_SSE2,RTE_CPUFLAG_SSE3,RTE_CPUFLAG_SSSE3,RTE_CPUFLAG_SSE4_1,RTE_CPUFLAG_SSE4_2,RTE_CPUFLAG_AES,RTE_CPUFLAG_PCLMULQDQ,RTE_CPUFLAG_AVX  -I/home/bruce/dpdk.org/examples/helloworld/build/include -I/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/include -include /home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/include/rte_config.h -O3 -W -Wall -Werror -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wold-style-definition -Wpointer-arith -Wcast-align -Wnested-externs -Wcast-qual -Wformat-nonliteral -Wformat-security -Wundef -Wwrite-strings  -Wl,-Map=helloworld.map,--cref -o helloworld main.o -Wl,--no-as-needed -Wl,-export-dynamic -L/home/bruce/dpdk.org/examples/helloworld/build/lib -L/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/lib  -L/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/lib -Wl,--whole-archive -Wl,--start-group -Wl,-lrt -Wl,-lm -Wl,-ldl -Wl,--end-group -Wl,--no-whole-archive
main.o: In function `rte_lcore_id':
/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/include/rte_lcore.h:85: undefined reference to `per_lcore__lcore_id'
main.o: In function `main':
/home/bruce/dpdk.org/examples/helloworld/main.c:64: undefined reference to `rte_eal_init'
main.o: In function `rte_lcore_is_enabled':
/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/include/rte_lcore.h:170: undefined reference to `rte_eal_get_configuration'
main.o: In function `rte_get_master_lcore':
/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/include/rte_lcore.h:97: undefined reference to `rte_eal_get_configuration'
main.o: In function `rte_lcore_is_enabled':
/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/include/rte_lcore.h:170: undefined reference to `rte_eal_get_configuration'
main.o: In function `rte_get_master_lcore':
/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/include/rte_lcore.h:97: undefined reference to `rte_eal_get_configuration'
main.o: In function `main':
/home/bruce/dpdk.org/examples/helloworld/main.c:70: undefined reference to `rte_eal_remote_launch'
main.o: In function `rte_lcore_id':
/home/bruce/dpdk.org/x86_64-native-linuxapp-gcc/include/rte_lcore.h:85: undefined reference to `per_lcore__lcore_id'
main.o: In function `main':
/home/bruce/dpdk.org/examples/helloworld/main.c:76: undefined reference to `rte_eal_mp_wait_lcore'
/home/bruce/dpdk.org/examples/helloworld/main.c:66: undefined reference to `__rte_panic'
collect2: error: ld returned 1 exit status
make[1]: *** [helloworld] Error 1
make: *** [all] Error 2
make: Leaving directory `/home/bruce/dpdk.org/examples/helloworld'