build: add --error-on-warn configure flag

This commit adds a configuration time flag named error-on-warn:
$ ./configure --help | grep -A1 error-on-warn
  --error-on-warn       Turn compiler warnings into errors for node core
                        sources.

The motivation for this is that CI jobs can use this flag to turn
warnings into errors.

PR-URL: https://github.com/nodejs/node/pull/32685
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matheus Marchini <mat@mmarchini.me>

1 files changed, 6 insertions, 0 deletions

diff --git a/configure.py b/configure.py
index 2e7deb5a15..ac26f62916 100755
--- a/configure.py
+++ b/configure.py
@@ -117,6 +117,11 @@ parser.add_option('--dest-os',
     choices=valid_os,
     help='operating system to build for ({0})'.format(', '.join(valid_os)))
 
+parser.add_option('--error-on-warn',
+    action='store_true',
+    dest='error_on_warn',
+    help='Turn compiler warnings into errors for node core sources.')
+
 parser.add_option('--gdb',
     action='store_true',
     dest='gdb',
@@ -1018,6 +1023,7 @@ def configure_node(o):
   o['variables']['node_install_npm'] = b(not options.without_npm)
   o['variables']['debug_node'] = b(options.debug_node)
   o['default_configuration'] = 'Debug' if options.debug else 'Release'
+  o['variables']['error_on_warn'] = b(options.error_on_warn)
 
   host_arch = host_arch_win() if os.name == 'nt' else host_arch_cc()
   target_arch = options.dest_cpu or host_arch