[dpdk-users] Difficulty With rte_eal_init()

[Cliff Burdick]

In regards to your fix above, how does this change the probing behavior? It
seems that it's just combining all the .a files into a single library,
right? I still needed to include that whole lost if -D options that the
examples use, or it still didn't seem to probe the bus. I must be missing
something else as well. Do you mind pasting all of the defines/libraries
that you pass into your app to get it to work? Currently the examples in
mine pass this large list:

-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_PCLMULQDQ -DRTE_MACHINE_CPUFLAG_AVX
-DRTE_MACHINE_CPUFLAG_RDRAND -DRTE_MACHINE_CPUFLAG_FSGSBASE
-DRTE_MACHINE_CPUFLAG_F16C -DRTE_MACHINE_CPUFLAG_AVX2
-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_PCLMULQDQ,RTE_CPUFLAG_AVX,RTE_CPUFLAG_RDRAND,RTE_CPUFLAG_FSGSBASE,RTE_CPUFLAG_F16C,RTE_CPUFLAG_AVX2
  -include $(RTE_SDK)/include/rte_config.h -O3


On Fri, Mar 18, 2016 at 2:56 PM, Matthew Hall <mhall at mhcomputing.net> wrote:

> On Fri, Mar 18, 2016 at 02:45:10PM -0700, Cliff Burdick wrote:
> > Hi, I've been trying to create a standalone application linked against
> > DPDK, and I'm having some issues getting the program to run properly. The
> > main problem is that in my standalone app compared to the example code,
> > rte_eal_init() from the example code seems to probe the PCI bus, whereas
> > mine doesn't.
> [SNIP]
> > However, when I then tried compiling the dpdk part of my app into a
> library
> > and linking against it from my main program, the PCI scanning goes away
> and
> > no devices are found.
>
> This hoses up every new app developer. Especially me, as I used DPDK before
> the PCI probe behavior was changed between versions and got totally lost
> when
> it broke. You need the following:
>
> Build Configuration:
>
> CONFIG_RTE_BUILD_COMBINE_LIBS=y
>
> Linker Flags (LDFLAGS):
>
> -Wl,--whole-archive -Wl,--start-group -ldpdk -Wl,--end-group
> -Wl,--no-whole-archive
>
> Sincerely.
> Matthew.
>