build: enable zoslib installation on z/OS

zoslib is a C/C++ runtime library and an extended implementation
of the z/OS LE C Runtime Library.

PR-URL: #41493
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Co-authored-by: Gaby Baghdadi <baghdadi@ca.ibm.com>

common.gypi

@@ -618,6 +618,8 @@
         'ldflags': [
           '-q64',
         ],
+        # for addons due to v8config.h include of "zos-base.h":
+        'include_dirs':  ['$(ZOSLIB_INCLUDES)'],
       }],
     ],
   }

tools/install.py

@@ -228,6 +228,12 @@ def wanted_v8_headers(files_arg, dest):
     files_arg = [name for name in files_arg if name in v8_headers]
     action(files_arg, dest)
 
+  def wanted_zoslib_headers(files_arg, dest):
+    import glob
+    zoslib_headers = glob.glob(zoslibinc + '/*.h')
+    files_arg = [name for name in files_arg if name in zoslib_headers]
+    action(files_arg, dest)
+
   action([
     'common.gypi',
     'config.gypi',
@@ -262,6 +268,14 @@ def wanted_v8_headers(files_arg, dest):
       'deps/zlib/zlib.h',
     ], 'include/node/')
 
+  if sys.platform == 'zos':
+    zoslibinc = os.environ.get('ZOSLIB_INCLUDES')
+    if not zoslibinc:
+      raise RuntimeError('Environment variable ZOSLIB_INCLUDES is not set\n')
+    if not os.path.isfile(zoslibinc + '/zos-base.h'):
+      raise RuntimeError('ZOSLIB_INCLUDES is not set to a valid location\n')
+    subdir_files(zoslibinc, 'include/node/zoslib/', wanted_zoslib_headers)
+
 def run(args):
   global node_prefix, install_path, target_defaults, variables