python-grpcio: Do not hardcode compiler -std options

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

meta-python/recipes-devtools/python/python-grpcio/0001-setup.py-Do-not-mix-C-and-C-compiler-options.patch

@@ -0,0 +1,36 @@
+From b02be74a2eff8abc612ef84f30e0fbce6a7f65f5 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Fri, 4 Aug 2017 09:04:07 -0700
+Subject: [PATCH] setup.py: Do not mix C and C++ compiler options
+
+EXTRA_ENV_COMPILE_ARGS is used both with CC and CXX
+so using -std=c++11 or -std=gnu99 together will cause
+build time errors espcially with clang
+
+error: invalid argument '-std=gnu99' not allowed with 'C++'
+
+gcc7 ( defaults are -std=gnu11 and -std=gnu++14 )
+ as well clang default to these standards mode or newer
+anyway
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ setup.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/setup.py b/setup.py
+index cb85273..f79878d 100644
+--- a/setup.py
++++ b/setup.py
+@@ -116,7 +116,7 @@ if EXTRA_ENV_COMPILE_ARGS is None:
+   elif 'win32' in sys.platform:
+     EXTRA_ENV_COMPILE_ARGS += ' -D_PYTHON_MSVC'
+   elif "linux" in sys.platform:
+-    EXTRA_ENV_COMPILE_ARGS += ' -std=c++11 -std=gnu99 -fvisibility=hidden -fno-wrapv'
++    EXTRA_ENV_COMPILE_ARGS += ' -fvisibility=hidden -fno-wrapv'
+   elif "darwin" in sys.platform:
+     EXTRA_ENV_COMPILE_ARGS += ' -fvisibility=hidden -fno-wrapv'
+ 
+-- 
+2.13.4
+

meta-python/recipes-devtools/python/python-grpcio_1.4.0.bb

@@ -4,6 +4,8 @@ SECTION = "devel/python"
 
 DEPENDS = "python-protobuf"
 
+SRC_URI += "file://0001-setup.py-Do-not-mix-C-and-C-compiler-options.patch \
+           "
 RDEPENDS_${PN} = "python-enum34 \
                   python-futures \
                   python-protobuf \