c-ares: use our compilation flags

If not requested otherwise as ./configure option, c-ares will strip
any -g from CFLAGS / CPPFLAGS and add -g0 instead, disabling all
debug info.
Similarly, it will try to enable optimisation (but bail out since in
that case it honors an existing -O in CFLAGS / CPPFLAGS)

Since we want to control code generation, patch out the code
mangling -g (and -O for consistency). Alternatively, if we were to
pass --enable-debug to ./configure, c-ares would at the same time
assume that we don't want optimisation anymore.

Signed-off-by: André Draszik <adraszik@tycoint.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>

meta-networking/recipes-support/c-ares/c-ares/0001-configure.ac-don-t-override-passed-cflags.patch

@@ -0,0 +1,26 @@
+From 2a7236d2a7bb9c3d3c3f44ebf59404bf7134fcb3 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andr=C3=A9=20Draszik?= <adraszik@tycoint.com>
+Date: Tue, 12 Apr 2016 11:37:28 +0100
+Subject: [PATCH] configure.ac: don't override passed cflags
+
+We are controlling debug and optimiser flags from OE
+---
+ configure.ac | 2 --
+ 1 file changed, 2 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 5c02450..3cf9fcd 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -147,8 +147,6 @@ dnl **********************************************************************
+ 
+ CARES_CHECK_COMPILER
+ CARES_SET_COMPILER_BASIC_OPTS
+-CARES_SET_COMPILER_DEBUG_OPTS
+-CARES_SET_COMPILER_OPTIMIZE_OPTS
+ CARES_SET_COMPILER_WARNING_OPTS
+ 
+ if test "$compiler_id" = "INTEL_UNIX_C"; then
+-- 
+2.8.0.rc3
+

meta-networking/recipes-support/c-ares/c-ares_1.11.0.bb

@@ -6,7 +6,9 @@ SECTION = "libs"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://ares_init.c;beginline=1;endline=3;md5=53f5ecf4c22c37cf1ddd1ef8f8eccce0"
 
-SRC_URI = "http://c-ares.haxx.se/download/${BP}.tar.gz"
+SRC_URI = "http://c-ares.haxx.se/download/${BP}.tar.gz \
+           file://0001-configure.ac-don-t-override-passed-cflags.patch \
+"
 SRC_URI[md5sum] = "d5c6d522cfc54bb6f215a0b7912d46be"
 SRC_URI[sha256sum] = "b3612e6617d9682928a1d50c1040de4db6519f977f0b25d40cf1b632900b3efd"