build: allow use of system-installed brotli

brotli is available as a shared library since 2016, so it makes sense
to allow its use as a system-installed version.

Some of the infrastructure was in place already (node.gyp and
node.gypi), but some bits in the configure script here were missing.

Add them, keeping the default as before, to use the bundled version.

Refs: google/brotli#421
Signed-off-by: André Draszik <[email protected]>

PR-URL: #32046
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Richard Lau <[email protected]>

configure.py

@@ -301,6 +301,27 @@
     dest='shared_zlib_libpath',
     help='a directory to search for the shared zlib DLL')
 
+shared_optgroup.add_option('--shared-brotli',
+    action='store_true',
+    dest='shared_brotli',
+    help='link to a shared brotli DLL instead of static linking')
+
+shared_optgroup.add_option('--shared-brotli-includes',
+    action='store',
+    dest='shared_brotli_includes',
+    help='directory containing brotli header files')
+
+shared_optgroup.add_option('--shared-brotli-libname',
+    action='store',
+    dest='shared_brotli_libname',
+    default='brotlidec,brotlienc',
+    help='alternative lib name to link to [default: %default]')
+
+shared_optgroup.add_option('--shared-brotli-libpath',
+    action='store',
+    dest='shared_brotli_libpath',
+    help='a directory to search for the shared brotli DLL')
+
 shared_optgroup.add_option('--shared-cares',
     action='store_true',
     dest='shared_cares',
@@ -1692,6 +1713,7 @@ def make_bin_override():
 configure_library('zlib', output)
 configure_library('http_parser', output)
 configure_library('libuv', output)
+configure_library('brotli', output, pkgname=['libbrotlidec', 'libbrotlienc'])
 configure_library('cares', output, pkgname='libcares')
 configure_library('nghttp2', output, pkgname='libnghttp2')
 configure_v8(output)