Use Dl_info only on systems where it is known to exist. It does not

exist on AIX 4.3.3, AIX 5.1, SCO 5, or Cygwin.

crypto/dso/dso_dlfcn.c

@@ -64,6 +64,7 @@
 # ifndef _GNU_SOURCE
 #  define _GNU_SOURCE	/* make sure dladdr is declared */
 # endif
+# define HAVE_DLINFO 1
 #endif
 
 #include <stdio.h>
@@ -133,6 +134,7 @@ DSO_METHOD *DSO_METHOD_dlfcn(void)
  * be hacked further relatively easily to deal with cases as we find
  * them. Initially this is to cope with OpenBSD. */
 #if defined(__OpenBSD__) || defined(__NetBSD__)
+#	define HAVE_DLINFO 1
 #	ifdef DL_LAZY
 #		define DLOPEN_FLAG DL_LAZY
 #	else
@@ -144,6 +146,7 @@ DSO_METHOD *DSO_METHOD_dlfcn(void)
 #	endif
 #else
 #	ifdef OPENSSL_SYS_SUNOS
+#		define HAVE_DLINFO 1
 #		define DLOPEN_FLAG 1
 #	else
 #		define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
@@ -395,6 +398,7 @@ This is a quote from IRIX manual for dladdr(3c):
      intention to change this interface, so on a practical level, the code
      below is safe to use on IRIX.
 */
+#define HAVE_DLINFO 1
 #include <rld_interface.h>
 #ifndef _RLD_INTERFACE_DLFCN_H_DLADDR
 #define _RLD_INTERFACE_DLFCN_H_DLADDR
@@ -422,7 +426,7 @@ static int dladdr(void *address, Dl_info *dl)
 
 static int dlfcn_pathbyaddr(void *addr,char *path,int sz)
 	{
-#if 1 /*def HAVE_DLINFO */
+#ifdef HAVE_DLINFO
 	Dl_info dli;
 	int len;