https://bugs.gentoo.org/625576

--- autoconf-2.69/bin/autoheader.in
+++ autoconf-2.69/bin/autoheader.in
@@ -173,6 +173,12 @@
 # Source what the traces are trying to tell us.
 verb "$me: running $autoconf to trace from $ARGV[0]";
 my $quoted_tmp = shell_quote ($tmp);
+my $perl_tmp;
+if ( $tmp =~ /^\// ) {
+  $perl_tmp=$tmp;
+} else {
+  $perl_tmp="./".$tmp;
+}
 xsystem ("$autoconf"
 	 # If you change this list, update the
 	 # `Autoheader-preselections' section of autom4te.in.
@@ -182,9 +188,9 @@
 	 . " " . shell_quote ($ARGV[0]) . " >$quoted_tmp/traces.pl");
 
 local (%verbatim, %symbol);
-debug "$me: \`do'ing $tmp/traces.pl:\n" . `sed 's/^/| /' $quoted_tmp/traces.pl`;
-do "$tmp/traces.pl";
-warn "couldn't parse $tmp/traces.pl: $@" if $@;
+debug "$me: \`do'ing $perl_tmp/traces.pl:\n" . `sed 's/^/| /' $quoted_tmp/traces.pl`;
+do "$perl_tmp/traces.pl";
+warn "couldn't parse $perl_tmp/traces.pl: $@" if $@;
 unless ($config_h)
   {
     error "error: AC_CONFIG_HEADERS not found in $ARGV[0]";