[dpdk-stable] [PATCH] build: mention -march in pkg-config description

[Luca Boccassi]

Applications need to at least match DPDK's -march option to build
successfully due to some static inline functions in the public headers.

This might cause problems, especially in distributions, so add a note
in the pkg-config description.

Fixes: a25a650be5f0 ("build: add infrastructure for meson and ninja builds")
Cc: stable at dpdk.org

Signed-off-by: Luca Boccassi <bluca at debian.org>
---
At the moment there are no adversely affected applications in Debian and
Ubuntu (collectd builds a separate shared object, and OVS/virtio-forwareder
are stand-alone DPDK-specific binaries), but we thought that having an
explicit notice would be good.

 meson.build | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index f87dc235f..35126106a 100644
--- a/meson.build
+++ b/meson.build
@@ -83,7 +83,9 @@ pkg.generate(name: meson.project_name(),
 	libraries: dpdk_libraries,
 	libraries_private: dpdk_drivers + dpdk_static_libraries +
 			['-Wl,-Bdynamic'] + dpdk_extra_ldflags,
-	description: 'The Data Plane Development Kit (DPDK)',
+	description: '''The Data Plane Development Kit (DPDK).
+Note that CFLAGS might contain an -march flag higher than typical baseline.
+This is required for a number of static inline functions in the public headers.''',
 	subdirs: [get_option('include_subdir_arch'), '.'],
 	extra_cflags: ['-include', 'rte_config.h'] + machine_args
 )
-- 
2.20.1