- Hopefully fix (#3984) compiler errors on Solaris while not introducing too many new ones on the other platforms

- With _BSD_SOURCE now explicitly defined bring back strdup to vm_x86_64_assembler.c

code/qcommon/q_shared.h

@@ -23,6 +23,14 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #ifndef __Q_SHARED_H
 #define __Q_SHARED_H
 
+#ifndef _BSD_SOURCE
+  #define _BSD_SOURCE
+#endif
+
+#ifndef _POSIX_C_SOURCE
+  #define _POSIX_C_SOURCE 200112L
+#endif
+
 // q_shared.h -- included first by ALL program modules.
 // A user mod should never modify this file