Make `check-docs` work from out-of-tree builds.

Makefile.am

@@ -109,8 +109,8 @@ check-spaces:
 		$(top_srcdir)/src/tools/*.[ch] \
 		$(top_srcdir)/src/tools/tor-fw-helper/*.[ch]
 
-check-docs:
-	$(top_srcdir)/scripts/maint/checkOptionDocs.pl
+check-docs: all
+	$(PERL) $(top_builddir)/scripts/maint/checkOptionDocs.pl
 
 check-logs:
 	$(top_srcdir)/scripts/maint/checkLogs.pl \

configure.ac

@@ -215,6 +215,8 @@ AC_PROG_CPP
 AC_PROG_MAKE_SET
 AC_PROG_RANLIB
 
+AC_PATH_PROG([PERL], [perl])
+
 dnl autoconf 2.59 appears not to support AC_PROG_SED
 AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
 
@@ -1661,6 +1663,7 @@ AC_CONFIG_FILES([
         contrib/dist/tor.service
         src/config/torrc.sample
         src/config/torrc.minimal
+        scripts/maint/checkOptionDocs.pl
 ])
 
 if test x$asciidoc = xtrue && test "$ASCIIDOC" = "none" ; then

scripts/maint/checkOptionDocs.pl → scripts/maint/checkOptionDocs.pl.in

@@ -7,7 +7,7 @@ my %torrcSampleOptions = ();
 my %manPageOptions = ();
 
 # Load the canonical list as actually accepted by Tor.
-open(F, "./src/or/tor --list-torrc-options |") or die;
+open(F, "@abs_top_builddir@/src/or/tor --list-torrc-options |") or die;
 while (<F>) {
     next if m!\[notice\] Tor v0\.!;
     if (m!^([A-Za-z0-9_]+)!) {
@@ -34,12 +34,12 @@ sub loadTorrc {
     0;
 }
 
-loadTorrc("./src/config/torrc.sample.in", \%torrcSampleOptions);
+loadTorrc("@abs_top_srcdir@/src/config/torrc.sample.in", \%torrcSampleOptions);
 
 # Try to figure out what's in the man page.
 
 my $considerNextLine = 0;
-open(F, "./doc/tor.1.txt") or die;
+open(F, "@abs_top_srcdir@/doc/tor.1.txt") or die;
 while (<F>) {
     if (m!^(?:\[\[([A-za-z0-9_]+)\]\] *)?\*\*([A-Za-z0-9_]+)\*\*!) {
         $manPageOptions{$2} = 1;
@@ -67,5 +67,3 @@ subtractHashes("Orphaned in torrc.sample.in", \%torrcSampleOptions, \%options);
 
 subtractHashes("Not in man page", \%options, \%manPageOptions);
 subtractHashes("Orphaned in man page", \%manPageOptions, \%options);
-
-