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

third_party/libxslt/libxslt.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': {
     'conditions': [
       ['OS=="linux"', {'os_include': 'linux'}],
       ['OS=="mac"', {'os_include': 'mac'}],
       ['OS=="win"', {'os_include': 'win32'}],
@@ skipping 13 matching lines @@
             'cflags': [
               '<!@(python ../../build/linux/pkg_config_wrapper.py --cflags libxslt)',
             ],
           },
           'link_settings': {
             'libraries': [
               '<!@(python ../../build/linux/pkg_config_wrapper.py --libs libxslt)',
             ],
           },
         }, { # else: OS != "linux" or ! use_system_libxslt
-          'type': 'static_library',
+          'type': '<(library)',
           'msvs_guid': 'FC0E1FD0-5DD7-4041-A1C9-CD3C376E4EED',
           'sources': [
             'libxslt/attributes.c',
             'libxslt/attributes.h',
             'libxslt/attrvt.c',
             'libxslt/documents.c',
             'libxslt/documents.h',
             'libxslt/extensions.c',
             'libxslt/extensions.h',
             'libxslt/extra.c',
@@ skipping 55 matching lines @@
             ],
           },
           'conditions': [
             ['OS!="win"', {'product_name': 'xslt'}],
           ],
         }],
       ],
     },
   ],
 }