[ovs-dev] [PATCH v2 1/2] acinclude.m4: fix build with dpdk 1.6.0r2

Daniele Di Proietto ddiproietto at vmware.com
Mon May 12 19:51:41 UTC 2014

I’ll make use of your code and reimplement the function using AC_SEARCH_LIBS.
I’l post another patch soon.

Thank you for your help


On May 9, 2014, at 5:23 PM, Ben Pfaff <blp at nicira.com> wrote:

> On Fri, May 09, 2014 at 04:56:57PM -0700, Daniele Di Proietto wrote:
>> libintel_dpdk.a refuses to link with libopenvswitch unless -ldl is used
>> Signed-off-by: Daniele Di Proietto <ddiproietto at vmware.com>
>> ---
>> This could probably be fixed also by using -Wl,-whole-archive
>> Besides, it looks like a workaround, so if anyone has a better
>> solution, that'd be great
> It's a little weird that DPDK needs an explicit .a on the link command
> line.  Any reason we can't just require the user to add the right -L to
> bring in the .a file's directory, then do:
>        AC_SEARCH_LIBS([...some dpdk function...], [intel_dpdk])
> instead of the hard-coded path.
> And if -ldl is needed sometimes, then you could just iterate:
>        found=false
>        save_LIBS=$LIBS
>        for extras in "" "-ldl "; do
>            LIBS="$extras$save_LIBS"
>            AC_SEARCH_LIBS([...some dpdk function...], [intel_dpdk], [found=:])
>            if $found; then
>                LIBS="-lintel_dpdk $extras$LIBS"
>                break
>            fi
>        done
>        if $found; then :; else
>            AC_MSG_FAILURE([are you sure dpdk is installed?])
>        fi
> (Above not actually tested)

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