[v3,1/1] doc: add pkg-config requirement for applications
diff mbox series

Message ID 20201126164328.1515020-1-thomas@monjalon.net
State Accepted, archived
Delegated to: Thomas Monjalon
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  • [v3,1/1] doc: add pkg-config requirement for applications
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ci/Intel-compilation success Compilation OK
ci/travis-robot success Travis build: passed
ci/checkpatch success coding style OK

Commit Message

Thomas Monjalon Nov. 26, 2020, 4:43 p.m. UTC 
From: Gregory Etelson <getelson@nvidia.com>

DPDK relies on pkg-config(1) to provide correct parameters for
compiler and linker used in application build.  Inaccurate build
parameters, produced by pkg-config from DPDK .pc files could fail
application build or cause unpredicted results during application
runtime.

Update system requirements doc about a bug in pkg-config v0.27
used in RHEL-7.

Signed-off-by: Gregory Etelson <getelson@nvidia.com>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
v3: improve wording with Bruce's suggestions
v2: make a more global note about the need for pkg-config in app build
---
 doc/guides/linux_gsg/sys_reqs.rst | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Comments

Bruce Richardson Nov. 26, 2020, 4:46 p.m. UTC | #1 
On Thu, Nov 26, 2020 at 05:43:28PM +0100, Thomas Monjalon wrote:
> From: Gregory Etelson <getelson@nvidia.com>
> 
> DPDK relies on pkg-config(1) to provide correct parameters for
> compiler and linker used in application build.  Inaccurate build
> parameters, produced by pkg-config from DPDK .pc files could fail
> application build or cause unpredicted results during application
> runtime.
> 
> Update system requirements doc about a bug in pkg-config v0.27
> used in RHEL-7.
> 
> Signed-off-by: Gregory Etelson <getelson@nvidia.com>
> Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
> ---
> v3: improve wording with Bruce's suggestions
> v2: make a more global note about the need for pkg-config in app build
> ---
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Thomas Monjalon Nov. 27, 2020, 12:59 a.m. UTC | #2 
26/11/2020 17:46, Bruce Richardson:
> On Thu, Nov 26, 2020 at 05:43:28PM +0100, Thomas Monjalon wrote:
> > From: Gregory Etelson <getelson@nvidia.com>
> > 
> > DPDK relies on pkg-config(1) to provide correct parameters for
> > compiler and linker used in application build.  Inaccurate build
> > parameters, produced by pkg-config from DPDK .pc files could fail
> > application build or cause unpredicted results during application
> > runtime.
> > 
> > Update system requirements doc about a bug in pkg-config v0.27
> > used in RHEL-7.
> > 
> > Signed-off-by: Gregory Etelson <getelson@nvidia.com>
> > Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
> > ---
> > v3: improve wording with Bruce's suggestions
> > v2: make a more global note about the need for pkg-config in app build
> > ---
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>

Applied

Patch
diff mbox series 

diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst
index dadb23fc89..9116616fe9 100644
--- a/doc/guides/linux_gsg/sys_reqs.rst
+++ b/doc/guides/linux_gsg/sys_reqs.rst
@@ -94,6 +94,19 @@  found in that driver's documentation in the relevant DPDK guide document,
 e.g. :doc:`../nics/index`
 
 
+Building DPDK Applications
+--------------------------
+
+The tool pkg-config or pkgconf, integrated in most build systems,
+must be used to parse options and dependencies from libdpdk.pc.
+
+.. note::
+
+   pkg-config 0.27, supplied with RHEL-7,
+   does not process the Libs.private section correctly,
+   resulting in statically linked applications not being linked properly.
+
+
 Running DPDK Applications
 -------------------------