Basic underpinnings of the gyp equivalent of the Linux SHARED=1 build:...

third_party/libevent/libevent.gyp

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../../build/common.gypi',
   ],
   'targets': [
     {
       'target_name': 'libevent',
       'product_name': 'event',
-      'type': 'static_library',
+      'type': '<(library)',
       'sources': [
         'buffer.c',
         'evbuffer.c',
         'evdns.c',
         'event.c',
         'event_tagging.c',
         'evrpc.c',
         'evutil.c',
         'http.c',
         'log.c',
@@ skipping 14 matching lines @@
         # native build uses autoconf, platform-specific config.h files are
         # provided and live in platform-specific directories.
         [ 'OS == "linux"', { 'sources': [ 'epoll.c', 'epoll_sub.c' ],
                              'include_dirs': [ 'linux' ] } ],
         [ 'OS == "mac"',   { 'sources': [ 'kqueue.c' ],
                              'include_dirs': [ 'mac' ] } ],
       ],
     },
   ],
 }