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-rwxr-xr-xsource4/script/find_unused_header_checks.pl38
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diff --git a/source4/script/find_unused_header_checks.pl b/source4/script/find_unused_header_checks.pl
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+++ b/source4/script/find_unused_header_checks.pl
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+#!/usr/bin/perl
+# Script that reads in configure and outputs the names of all the defines
+# it defines that are used nowhere in the code
+
+# Arguments:
+# 1: configure.in
+# 2: header files
+#
+# You might want to specify configure.in again in the list of header files
+# as well, because it also uses some includes.
+
+my %symbols;
+
+# First, make a list of defines in configure
+$in = shift;
+
+while($tmp = shift) {
+ open(FI, $tmp);
+ while(<FI>) {
+ while(/\#([ \t]*)include <(.*)>/sgm) {
+ $symbols{$2} = 1;
+ }
+ }
+ close FI;
+}
+
+open(IN, $in) or die("Can't open $in");
+
+while(<IN>) {
+ if(/AC_CHECK_HEADERS\(([\[]*)(.*)([\]]*)\)/) {
+ @hs = split / /, $2;
+ foreach(@hs) {
+ if($symbols{$_} != 1) { print "|$_|\n"; }
+ }
+ }
+}
+
+close IN;