pidgin-sipe: Do not add native libdir to pkgconfig search path

This works fine until valgrind is installed on build host but its not
selected as option to build in recipe, configure wrongly pokes at
/usr/lib and sees valgrind there and enables it but only to fail in
compile time where it does not find valgrind.h in recipe sysroot, since
OE's build environment add right guardrails to pkgconfig, there is no
need to add build staging area to pkgconfig search path which turns out
to be wrong for cross builds anyway

Fixes
../../../pidgin-sipe-1.25.0/src/core/sipe-cert-crypto-nss.c:34:10: fatal error: 'valgrind.h' file not found
         ^~~~~~~~~~~~

Signed-off-by: Khem Raj <raj.khem@gmail.com>
(cherry picked from commit 99bc440104)
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-support/pidgin/pidgin-sipe/0001-configure-Do-not-add-native-paths-to-pkgconfig-searc.patch

@@ -0,0 +1,36 @@
+From fedef3c0b1772cee97d7288bee7d5d50805a5964 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Sat, 12 Dec 2020 08:56:04 -0800
+Subject: [PATCH] configure: Do not add native paths to pkgconfig search
+
+This does not work in cross environments, secondly in OE we already
+point pkkconfig into recipe sysroot where it will find all the
+dependencies therefore this setting is not needed
+
+Upstream-Status: Inappropriate [ OE-Specific ]
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ configure.ac | 6 ------
+ 1 file changed, 6 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 0df85b0..2481153 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -70,12 +70,6 @@ AC_CHECK_HEADERS([])
+ dnl checks for library functions
+ AC_CHECK_FUNCS([])
+ 
+-dnl tell pkgconfig to look in the same prefix where we're installing this to,
+-dnl as that is likely where libpurple will be found if it is not in the default
+-dnl pkgconfig path
+-PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:${libdir}/pkgconfig"
+-export PKG_CONFIG_PATH
+-
+ dnl debug mode
+ AC_ARG_ENABLE(debug,
+ 	[AS_HELP_STRING([--enable-debug],
+-- 
+2.29.2
+

meta-oe/recipes-support/pidgin/pidgin-sipe_1.25.0.bb

@@ -10,6 +10,7 @@ inherit autotools gettext pkgconfig
 SRC_URI = "${SOURCEFORGE_MIRROR}/sipe/pidgin-sipe-${PV}.tar.xz \
            file://0001-sipe-consider-64bit-time_t-when-printing.patch \
            file://0001-Align-structs-casts-with-time_t-elements-to-8byte-bo.patch \
+           file://0001-configure-Do-not-add-native-paths-to-pkgconfig-searc.patch \
 "
 
 SRC_URI[md5sum] = "0e742f021dc8c3f17435aea05c3e0314"