1 files changed, 69 insertions, 0 deletions
diff --git a/docs/examples/version-check.pl b/docs/examples/version-check.pl
new file mode 100755
index 000000000..f8f4f9d24
--- /dev/null
+++ b/docs/examples/version-check.pl
@@ -0,0 +1,69 @@
+#!/usr/bin/env perl
+
+open(S, "<../libcurl/symbols-in-versions") || die;
+
+my %doc;
+my %rem;
+while(<S>) {
+    if(/(^CURL[^ \n]*) *(.*)/) {
+        my ($sym, $rest)=($1, $2);
+        my @a=split(/ +/, $rest);
+
+        $doc{$sym}=$a[0]; # when it was introduced
+
+        if($a[2]) {
+            # this symbol is documented to have been present the last time
+            # in this release
+            $rem{$sym}=$a[2];
+        }
+    }
+
+}
+
+close(S);
+
+sub age {
+    my ($ver)=@_;
+
+    my @s=split(/\./, $ver);
+    return $s[0]*10000+$s[1]*100+$s[2];
+}
+
+my %used;
+open(C, "<$ARGV[0]") || die;
+
+while(<C>) {
+    if(/\W(CURL[_A-Z0-9v]+)\W/) {
+        #print "$1\n";
+        $used{$1}++;
+    }
+}
+
+close(C);
+
+sub sortversions {
+    my $r = age($doc{$a}) <=> age($doc{$b});
+    if(!$r) {
+        $r = $a cmp $b;
+    }
+    return $r;
+}
+
+my @recent = reverse sort sortversions keys %used;
+
+# the most recent symbol
+my $newsym = $recent[0];
+# the most recent version
+my $newver = $doc{$newsym}; 
+
+print "The scanned source uses these symbols introduced in $newver:\n";
+
+for my $w (@recent) {
+    if($doc{$w} eq $newver) {
+        printf "  $w\n";
+        next;
+    }
+    last;
+}
+
+