ti-rpmsg-char-examples: Fix cross compile

This fixes problems during cross compile where it starts to peek into
build host's include and library paths and causes errors with clang and
QA warnings with gcc

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Reviewed-by: Denys Dmytriyenko <denys@ti.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>

recipes-ti/ipc/ti-rpmsg-char-examples/0001-examples-Remove-use-of-includedir-and-libdir.patch

@@ -0,0 +1,38 @@
+From 1a26cb577ba54dd9214eeb94fed0ce3a0f4603b6 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Sat, 24 Oct 2020 23:46:39 -0700
+Subject: [PATCH] examples: Remove use of includedir and libdir
+
+These point to standard include and library paths which already are used
+from sysroot relative paths secondly, they use absolute paths which
+means we are asking to add -I/usr/include which might be ok in a native
+build but not in cross build. This helps mitigate QA errors found with
+OE build system since it finds it adding host include and library search
+paths to linker/compiler commandline
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ examples/Makefile.am | 5 +----
+ 1 file changed, 1 insertion(+), 4 deletions(-)
+
+diff --git a/examples/Makefile.am b/examples/Makefile.am
+index 5a9bedb..d547e41 100644
+--- a/examples/Makefile.am
++++ b/examples/Makefile.am
+@@ -1,6 +1,4 @@
+-INCLUDE = -I${includedir}
+-
+-AM_CFLAGS = -Wall -g -O2 $(INCLUDE)
++AM_CFLAGS = -Wall -g -O2
+ 
+ bin_PROGRAMS = rpmsg_char_simple
+ 
+@@ -8,4 +6,3 @@ bin_PROGRAMS = rpmsg_char_simple
+ rpmsg_char_simple_SOURCES = rpmsg_char_simple.c
+ rpmsg_char_simple_CPPFLAGS = $(AM_CFLAGS)
+ rpmsg_char_simple_LDADD = -lpthread -lti_rpmsg_char
+-rpmsg_char_simple_LDFLAGS = -L${libdir}
+-- 
+2.29.1
+

recipes-ti/ipc/ti-rpmsg-char-examples_git.bb

@@ -2,6 +2,8 @@ SUMMARY = "TI RPMsg Char Sample Applications and Tests"
 
 require ti-rpmsg-char.inc
 
+SRC_URI += "file://0001-examples-Remove-use-of-includedir-and-libdir.patch"
+
 DEPENDS = "ti-rpmsg-char"
 
 inherit autotools pkgconfig