File 0003-Allow-building-the-python-module-with-syst... of Package grpc

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File 0003-Allow-building-the-python-module-with-system-cares.patch of Package grpc (Revision ac0a4b6fd9937970830c17f24d7fe471)

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From 78a6e04ec1efc2dc839f0329dcff732940e27fd9 Mon Sep 17 00:00:00 2001
From: Thomas Bechtold <tbechtold@suse.com>
Date: Fri, 25 May 2018 07:08:05 +0200
Subject: [PATCH 3/3] Allow building the python module with system cares

When building the python module and using the new
GRPC_PYTHON_BUILD_SYSTEM_CARES env variable, the third party cares code
is not compiled. Instead, the cares shared library installed on the
system is used during runtime.
This is useful for distributions who don't want to include code copies
but use shared libraries instead.
---
 setup.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/setup.py b/setup.py
index 483d3ac168..43c25aafeb 100644
--- a/setup.py
+++ b/setup.py
@@ -96,6 +96,12 @@ BUILD_WITH_SYSTEM_OPENSSL = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_OPENSSL',
 BUILD_WITH_SYSTEM_ZLIB = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_ZLIB',
                                         False)
 
+# Export this variable to use the system installation of cares. You need to
+# have the header files installed (in /usr/include/) and during
+# runtime, the shared libary must be installed
+BUILD_WITH_SYSTEM_CARES = os.environ.get('GRPC_PYTHON_BUILD_SYSTEM_CARES',
+                                         False)
+
 # Environment variable to determine whether or not to enable coverage analysis
 # in Cython modules.
 ENABLE_CYTHON_TRACING = os.environ.get(
@@ -169,6 +175,10 @@ if BUILD_WITH_SYSTEM_ZLIB:
   CORE_C_FILES = filter(lambda x: 'third_party/zlib' not in x, CORE_C_FILES)
   ZLIB_INCLUDE = (os.path.join('/usr', 'include'),)
 
+if BUILD_WITH_SYSTEM_CARES:
+  CORE_C_FILES = filter(lambda x: 'third_party/cares' not in x, CORE_C_FILES)
+  CARES_INCLUDE = (os.path.join('/usr', 'include'),)
+
 EXTENSION_INCLUDE_DIRECTORIES = (
     (PYTHON_STEM,) + CORE_INCLUDE + SSL_INCLUDE + ZLIB_INCLUDE +
     CARES_INCLUDE + ADDRESS_SORTING_INCLUDE)
@@ -184,6 +194,8 @@ if BUILD_WITH_SYSTEM_OPENSSL:
   EXTENSION_LIBRARIES += ('ssl', 'crypto',)
 if BUILD_WITH_SYSTEM_ZLIB:
   EXTENSION_LIBRARIES += ('z',)
+if BUILD_WITH_SYSTEM_CARES:
+  EXTENSION_LIBRARIES += ('cares',)
 
 DEFINE_MACROS = (
     ('OPENSSL_NO_ASM', 1), ('_WIN32_WINNT', 0x600),
-- 
2.17.0

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File 0003-Allow-building-the-python-module-with-system-cares.patch of Package grpc (Revision ac0a4b6fd9937970830c17f24d7fe471)

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