dpdk: fix finding librt

The generated pkg-config libdpdk.pc file has the output
with full path of librt such as
<builddir>/recipe-sysroot/usr/lib/librt.so
instead of -lrt.

This will cause an issue when compile DPDK app
with static library as the librt is not found with the
hardcode path in the libdpdk.pc file.

Signed-off-by: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>

2 files changed, 36 insertions, 0 deletions

diff --git a/recipes-extended/dpdk/dpdk/0001-ifpga-meson-Fix-finding-librt-using-find_library.patch b/recipes-extended/dpdk/dpdk/0001-ifpga-meson-Fix-finding-librt-using-find_library.patch
new file mode 100644
index 0000000..4df28c4
--- /dev/null
+++ b/recipes-extended/dpdk/dpdk/0001-ifpga-meson-Fix-finding-librt-using-find_library.patch
@@ -0,0 +1,35 @@
+From 308409d72671b7978b20d40748ad985a235b6c86 Mon Sep 17 00:00:00 2001
+From: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>
+Date: Thu, 24 Jun 2021 11:30:09 +0800
+Subject: [PATCH] ifpga/meson: Fix finding librt using find_library()
+
+Finding with "librt" keyword would give the output
+with full path of librt such as /usr/lib/librt.so
+instead of -lrt.
+
+Assume find_library() will prepend "lib", thus remove
+"lib" from "librt" keyword. The output will shows as
+-lrt.
+
+Upstream-Status: Submitted [https://mails.dpdk.org/archives/stable/2021-June/031840.html]
+
+Signed-off-by: Mohamad Noor Alim Hussin <mohamad.noor.alim.hussin@intel.com>
+---
+ drivers/raw/ifpga/base/meson.build | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/raw/ifpga/base/meson.build b/drivers/raw/ifpga/base/meson.build
+index da2d6e33c..949f7f127 100644
+--- a/drivers/raw/ifpga/base/meson.build
++++ b/drivers/raw/ifpga/base/meson.build
+@@ -25,7 +25,7 @@ sources = [
+
+ rtdep = dependency('librt', required: false)
+ if not rtdep.found()
+-       rtdep = cc.find_library('librt', required: false)
++       rtdep = cc.find_library('rt', required: false)
+ endif
+ if not rtdep.found()
+        build = false
+--
+2.32.0
diff --git a/recipes-extended/dpdk/dpdk_20.11.1.bb b/recipes-extended/dpdk/dpdk_20.11.1.bb
index d96fd8b..19e8bcc 100644
--- a/recipes-extended/dpdk/dpdk_20.11.1.bb
+++ b/recipes-extended/dpdk/dpdk_20.11.1.bb
@@ -2,6 +2,7 @@ include dpdk.inc
 
 SRC_URI += " \
             file://0001-meson.build-march-and-mcpu-already-passed-by-Yocto.patch \
+            file://0001-ifpga-meson-Fix-finding-librt-using-find_library.patch \
 "
 
 STABLE = "-stable"