From 9b2f1d400db8b8d0045f5a58a748a2dc52b5c9ef Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 17 Feb 2021 13:38:55 -0800
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

Keep '-std=c++11' to fix native build error
with old gcc (such as gcc 5.4.0 on ubuntu 16.04), for clang
we will remove them through GRPC_PYTHON_CFLAGS at do_compile
in bb recipe.

While export CC="gcc ", cc_args is None, it will
cause subprocess.Popen always return 1. On centos 8, if you don't
install package libatomic, there will be a native build error
`cannot find /usr/lib64/libatomic.so.1.2.0'.

Add no harm '-g' to cc_args if cc_args is empty.

Upstream-Status: Inappropriate [oe specific]

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 setup.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/setup.py
+++ b/setup.py
@@ -87,8 +87,11 @@ def check_linker_need_libatomic():
     """Test if linker on system needs libatomic."""
     code_test = (b'#include <atomic>\n' +
                  b'int main() { return std::atomic<int64_t>{}; }')
-    cxx = os.environ.get('CXX', 'c++')
-    cpp_test = subprocess.Popen([cxx, '-x', 'c++', '-std=c++11', '-'],
+    cxx, cxx_args = os.environ.get('CXX').split(' ', 1) or 'c++'
+    if not cxx_args:
+      cxx_args = "-g"
+
+    cpp_test = subprocess.Popen([cxx, cxx_args, '-x', 'c++', '-std=c++11', '-'],
                                 stdin=PIPE,
                                 stdout=PIPE,
                                 stderr=PIPE)
@@ -98,7 +101,7 @@ def check_linker_need_libatomic():
     # Double-check to see if -latomic actually can solve the problem.
     # https://github.com/grpc/grpc/issues/22491
     cpp_test = subprocess.Popen(
-        [cxx, '-x', 'c++', '-std=c++11', '-', '-latomic'],
+        [cxx, cxx_args, '-x', 'c++', '-std=c++11', '-', '-latomic'],
         stdin=PIPE,
         stdout=PIPE,
         stderr=PIPE)
