Merge pull request grpc#11869 from jtattermusch/kokoro_fix_python_art…

…ifacts

Fix python 2.7 & 3.4 artifacts on kokoro

tools/distrib/python/grpcio_tools/setup.py

@@ -62,9 +62,9 @@
       # envvars) without adding yet more GRPC-specific envvars.
       # See https://sourceforge.net/p/mingw-w64/bugs/363/
       if '32' in platform.architecture()[0]:
-        EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s'
+        EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime32 -D_timeb=__timeb32 -D_ftime_s=_ftime32_s -D_hypot=hypot'
       else:
-        EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64'
+        EXTRA_ENV_COMPILE_ARGS += ' -D_ftime=_ftime64 -D_timeb=__timeb64 -D_hypot=hypot'
     else:
       # We need to statically link the C++ Runtime, only the C runtime is
       # available dynamically

tools/internal_ci/windows/grpc_build_artifacts.bat

@@ -19,10 +19,13 @@ rename C:\Python34_32bit Python34_32bits
 rename C:\Python35_32bit Python35_32bits
 rename C:\Python36_32bit Python36_32bits
 
+pacman -S --noconfirm mingw64/mingw-w64-x86_64-gcc mingw32/mingw-w64-i686-gcc
+
 @rem make sure msys binaries are preferred over cygwin binaries
 @rem set path to python 2.7
 set PATH=C:\tools\msys64\usr\bin;C:\Python27;%PATH%
 
+
 @rem enter repo root
 cd /d %~dp0\..\..\..
 

tools/run_tests/artifacts/build_artifact_python.bat

@@ -12,8 +12,8 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 
-
-set PATH=C:\%1;C:\%1\scripts;C:\msys64\mingw%2\bin;%PATH%
+@rem set path to python & mingw compiler
+set PATH=C:\%1;C:\%1\scripts;C:\msys64\mingw%2\bin;C:\tools\msys64\mingw%2\bin;%PATH%
 
 pip install --upgrade six
 pip install --upgrade setuptools