Improve libcrypto obj_xref.h generator

Modify objxref.pl to output $OpenBSD$ header and
__BEGIN_HIDDEN_DECLS / __END_HIDDEN_DECLS .

ok and comment from tb@

1 files changed, 4 insertions, 0 deletions

diff --git a/src/lib/libcrypto/objects/objxref.pl b/src/lib/libcrypto/objects/objxref.pl
index 731d3ae22c..8873c91ad9 100644
--- a/src/lib/libcrypto/objects/objxref.pl
+++ b/src/lib/libcrypto/objects/objxref.pl
@@ -60,8 +60,11 @@ my $pname = $0;
 $pname =~ s|^.[^/]/||;
 
 print <<EOF;
+/* \$OpenBSD\$ */
 /* AUTOGENERATED BY $pname, DO NOT EDIT */
 
+__BEGIN_HIDDEN_DECLS
+
 typedef struct
         {
         int sign_id;
@@ -95,6 +98,7 @@ foreach (@srt2)
         }
 
 print "\t};\n\n";
+print "__END_HIDDEN_DECLS\n";
 
 sub check_oid
         {