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From: "Gonzalez Monroy, Sergio" <sergio.gonzalez.monroy@intel.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v3 1/5] mk: remove combined library and related options
Date: Thu, 09 Apr 2015 14:47:24 +0100	[thread overview]
Message-ID: <552682EC.9050306@intel.com> (raw)
In-Reply-To: <3947209.nq3HLHzIVI@xps13>

On 09/04/2015 14:33, Thomas Monjalon wrote:
> 2015-04-09 07:19, Neil Horman:
>> On Thu, Apr 09, 2015 at 12:06:47PM +0300, Avi Kivity wrote:
>>> On 04/09/2015 11:33 AM, Gonzalez Monroy, Sergio wrote:
>>>> On 08/04/2015 19:26, Stephen Hemminger wrote:
>>>>> On Wed,  8 Apr 2015 16:07:21 +0100
>>>>> Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com> wrote:
>>>>>
>>>>>> Currently, the target/rules to build combined libraries is different
>>>>>> than the one to build individual libraries.
>>>>>>
>>>>>> By removing the combined library option as a build configuration option
>>>>>> we simplify the build pocess by having a single point for
>>>>>> linking/archiving
>>>>>> libraries in DPDK.
>>>>>>
>>>>>> This patch removes CONFIG_RTE_BUILD_COMBINE_LIB build config option and
>>>>>> removes the makefiles associated with building a combined library.
>>>>>>
>>>>>> The CONFIG_RTE_LIBNAME config option is kept as it will be use to
>>>>>> always generate a linker script that acts as a single combined library.
>>>>>>
>>>>>> Signed-off-by: Sergio Gonzalez Monroy
>>>>>> <sergio.gonzalez.monroy@intel.com>
>>>>> No. We use combined library and it greatly simplfies the application
>>>>> linking process.
>>>>>
>>>> After all the opposition this patch had in v2, I did explain the current
>>>> issues
>>>> (see http://dpdk.org/ml/archives/dev/2015-March/015366.html ) and this was
>>>> the agreed solution.
>>>>
>>>> As I mention in the cover letter (also see patch 2/5), building DPDK
>>>> (after applying this patch series) will always generate a very simple
>>>> linker script that behaves as a combined library.
>>>> I encourage you to apply this patch series and try to build your app
>>>> (which links against combined lib).
>>>> Your app should build without problem unless I messed up somewhere and it
>>>> needs fixing.
>>> Is it possible to generate a pkgconfig file (dpdk.pc) that contains all of
>>> the setting needed to compile and link with dpdk?  That will greatly
>>> simplify usage.
>>>
>>> A linker script is just too esoteric.
>>>
>> Why esoteric?  We're not talking about a linker script in the sense of a binary
>> layout file, we're talking about a prewritten/generated libdpdk_core.so that
>> contains linker directives to include the appropriate libraries.  You link it
>> just like you do any other library, but it lets you ignore how they are broken
>> up.
>>
>> We could certainly do a pkg-config file, but I don't think thats any more
>> adventageous than this solution.
> As already commented (http://dpdk.org/ml/archives/dev/2015-March/015367.html),
I misunderstood the pkgconfig reference in your previous comment.
It seems even more trivial to generate the 'combined' linker script lib 
having a pkg-config file.
We could simplify much of the rte.app.mk by using a pkg-config file.

Sergio
> pkgconfig could be something useful in any case (single or multi-libraries).
> Having a linker script to replace the single ("combined") library may be
> convenient in some cases but do not replace pkgconfig.
>

  reply	other threads:[~2015-04-09 13:47 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-08 15:07 [dpdk-dev] [PATCH v3 0/5] Enhance build process Sergio Gonzalez Monroy
2015-04-08 15:07 ` [dpdk-dev] [PATCH v3 1/5] mk: remove combined library and related options Sergio Gonzalez Monroy
2015-04-08 18:26   ` Stephen Hemminger
2015-04-09  8:33     ` Gonzalez Monroy, Sergio
2015-04-09  9:06       ` Avi Kivity
2015-04-09  9:42         ` Gonzalez Monroy, Sergio
2015-04-09 11:19         ` Neil Horman
2015-04-09 13:33           ` Thomas Monjalon
2015-04-09 13:47             ` Gonzalez Monroy, Sergio [this message]
2015-04-09 17:00           ` Avi Kivity
2015-04-09 20:34             ` Neil Horman
2015-04-13  9:52               ` Gonzalez Monroy, Sergio
2015-04-13 11:04                 ` Thomas Monjalon
2015-04-13 11:23                   ` Neil Horman
2015-04-08 15:07 ` [dpdk-dev] [PATCH v3 2/5] mk: always generate combined lib linker script Sergio Gonzalez Monroy
2015-04-08 15:07 ` [dpdk-dev] [PATCH v3 3/5] lib: set LDLIBS for each library Sergio Gonzalez Monroy
2015-04-08 15:07 ` [dpdk-dev] [PATCH v3 4/5] mk: use LDLIBS when linking shared libraries Sergio Gonzalez Monroy
2015-04-08 15:07 ` [dpdk-dev] [PATCH v3 5/5] mk: update LDLIBS for app building Sergio Gonzalez Monroy

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