test1175: verify symbols-in-versions and libcurl-errors.3 in sync

Closes #4628

tests/error-codes.pl

@@ -0,0 +1,80 @@
+#!/usr/bin/env perl
+#***************************************************************************
+#                                  _   _ ____  _
+#  Project                     ___| | | |  _ \| |
+#                             / __| | | | |_) | |
+#                            | (__| |_| |  _ <| |___
+#                             \___|\___/|_| \_\_____|
+#
+# Copyright (C) 2010-2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at https://curl.haxx.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+###########################################################################
+#
+#
+
+use strict;
+use warnings;
+
+# we may get the dir root pointed out
+my $root=$ARGV[0] || ".";
+
+my %error; # from the include file
+my %docs; # from libcurl-errors.3
+
+sub getdocserrors {
+    open(F, "<$root/docs/libcurl/libcurl-errors.3");
+    while(<F>) {
+        if($_ =~ /^.IP \"(CURL[EM]_[^ \t\"]*)/) {
+            my ($symbol) = ($1);
+            if($symbol =~ /OBSOLETE/) {
+                ;
+            }
+            else {
+                $docs{$symbol}=1;
+            }
+        }
+    }
+    close(F);
+}
+
+sub getincludeerrors {
+    open(F, "<$root/docs/libcurl/symbols-in-versions");
+    while(<F>) {
+        if($_ =~ /^(CURL[EM]_[^ \t]*)[ \t]*([0-9.]+)[ \t]*(.*)/) {
+            my ($symbol, $added, $rest) = ($1,$2,$3);
+            if($rest =~ /^([0-9.]+)/) {
+                # removed!
+            }
+            else {
+                $error{$symbol}=$added;
+            }
+        }
+    }
+    close(F);
+}
+
+getincludeerrors();
+getdocserrors();
+
+for(sort keys %error) {
+    if($error{$_} && !$docs{$_}) {
+        print "$_ is not in libcurl-errors.3\n";
+    }
+}
+
+for(sort keys %docs) {
+    if($docs{$_} && !$error{$_}) {
+        print "$_ is not in symbols-in-versions\n";
+    }
+}