From a0b200db764e324850a61ab605068e1e91d692e8 Mon Sep 17 00:00:00 2001
From: marco <marco@freepascal.org>
Date: Sat, 21 Jan 2012 11:56:40 +0000
Subject: [PATCH]  * Add dlvsym under ifdef ELF, defined ELF for the OSes I
 could check     (FreeBSD, OpenBSD, Linux) Mantis #18892

git-svn-id: trunk@20134 -
---
 rtl/unix/dl.pp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/rtl/unix/dl.pp b/rtl/unix/dl.pp
index b909d1f011..226f715af3 100644
--- a/rtl/unix/dl.pp
+++ b/rtl/unix/dl.pp
@@ -27,6 +27,10 @@ const
   {$endif}
 {$endif}
 
+{$if defined(linux) or defined(freebsd) or defined(openbsd)}
+  {$define ELF} // ELF symbol versioning.
+{$endif}
+
 {$if defined(linux) and defined(cpuarm)}
 { arm-linux seems to require this }
 {$linklib c}
@@ -56,6 +60,9 @@ type
 
 function dlopen(Name : PChar; Flags : longint) : Pointer; cdecl; external libdl;
 function dlsym(Lib : Pointer; Name : Pchar) : Pointer; cdecl; external Libdl;
+{$ifdef ELF}
+function dlvsym(Lib : Pointer; Name : Pchar; Version: Pchar) : Pointer; cdecl; external Libdl;
+{$endif}
 function dlclose(Lib : Pointer) : Longint; cdecl; external libdl;
 function dlerror() : Pchar; cdecl; external libdl;
 { overloaded for compatibility with hmodule }