Script to detect unused autoconf outputs

Should help speed up mingw builds by a percent or two.

1 files changed, 20 insertions, 0 deletions

diff --git a/scripts/maint/check_config_macros.pl b/scripts/maint/check_config_macros.pl
new file mode 100755
index 0000000000..bcde2beccc
--- /dev/null
+++ b/scripts/maint/check_config_macros.pl
@@ -0,0 +1,20 @@
+#!/usr/bin/perl -w
+
+use strict;
+
+my @macros = ();
+
+open(F, 'orconfig.h.in');
+while(<F>) {
+    if (/^#undef +([A-Za-z0-9_]*)/) {
+	push @macros, $1;
+    }
+}
+close F;
+
+for my $m (@macros) {
+    my $s = `git grep '$m' src`;
+    if ($s eq '') {
+	print "Unused: $m\n";
+    }
+}