do not try to run 'make' on appveyor

it does not exist here. Instead, manually copy all build commands into appveyor.yml.

Note, ECHO without arguments prints "ECHO is off." on Windows, so it should not be used.

appveyor.yml

@@ -67,6 +67,18 @@ install:
   # target Python version and architecture
   - "%CMD_IN_ENV% pip install cython greenlet"
 
+  - "python util/cythonpp.py -o gevent.corecext.c gevent/core.ppyx"
+  - "type gevent\\callbacks.c >> gevent.corecext.c"
+  - "move gevent.corecext.* gevent"
+  - "cython -o gevent.ares.c gevent/ares.pyx"
+  - "move gevent.ares.* gevent"
+  - "move gevent\\_semaphore.pyx gevent\\_semaphore.py"
+  - "cython -o gevent._semaphore.c gevent/_semaphore.py"
+  - "move gevent._semaphore.* gevent"
+  - "del gevent\\_semaphore.py"
+  - "cython -o gevent._util.c gevent/_util.pyx"
+  - "move gevent._util.* gevent"
+
 build: false  # Not a C# project, build stuff at the test step instead.
 
 test_script:

setup.py

@@ -359,7 +359,7 @@ else:
 
 
 def run_setup(ext_modules, run_make):
-    if run_make:
+    if run_make and not os.environ.get('APPVEYOR'):
         if isinstance(run_make, str):
             make(run_make)
         else: