avro-c: Fix build with clang

Update SRC_URI to point to github mirror
Add a patch to fix build with clang

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/avro/avro-c/0001-avro-c-Fix-build-with-clang-compiler.patch

@@ -0,0 +1,37 @@
+From 518bb8ccfb3f3fc143fbd571782f3e40573d01b5 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 10 Apr 2017 09:15:04 -0700
+Subject: [PATCH] avro-c: Fix build with clang compiler
+
+Clang advertizes itself to be compatible with gcc 4.2.1
+while that was true several years ago, it now supports
+a lot more newer features, the test to just check gcc
+version should be supplanted with clang check as well
+so atomic support in clang can be asserted as well
+
+Fixes
+
+lang/c/src/avro/refcount.h:301:2: error: "No atomic implementation!"
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ lang/c/src/avro/refcount.h | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/lang/c/src/avro/refcount.h b/lang/c/src/avro/refcount.h
+index 69afa4fc..d76ba057 100644
+--- a/lang/c/src/avro/refcount.h
++++ b/lang/c/src/avro/refcount.h
+@@ -118,7 +118,8 @@ avro_refcount_dec(volatile int *refcount)
+  * GCC intrinsics
+  */
+ 
+-#elif (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) > 40500
++#elif (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) > 40500 \
++|| defined(__clang__)
+ 
+ static inline void
+ avro_refcount_set(volatile int *refcount, int value)
+-- 
+2.12.2
+

meta-oe/recipes-support/avro/avro-c_1.8.1.bb

@@ -2,16 +2,18 @@ SUMMARY = "Apache Avro data serialization system."
 HOMEPAGE = "http://apr.apache.org/"
 SECTION = "libs"
 
-
 LICENSE = "Apache-2.0"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=73bdf70f268f0b3b9c5a83dd7a6f3324"
 
 DEPENDS = "jansson zlib xz"
+PV .= "+git${SRCPV}"
 
-SRC_URI = "${APACHE_MIRROR}/avro/avro-${PV}/c/avro-c-${PV}.tar.gz"
+SRCREV = "4b3677c32b879e0e7f717eb95f9135ac654da760"
+SRC_URI = "git://github.com/apache/avro \
+           file://0001-avro-c-Fix-build-with-clang-compiler.patch;patchdir=../../ \
+"
 
-SRC_URI[md5sum] = "b268348536714541e10411823a1b59b0"
+S = "${WORKDIR}/git/lang/c"
-SRC_URI[sha256sum] = "e5042088fa47e1aa2860c5cfed0bd061d81f9e96628f8b4d87a24d9b8c5e4ecc"
 
 LDFLAGS_append_libc-uclibc = " -lm"