setgroup/initgroup availability on linux (FSBUILD-160)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13359 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_core.c

@@ -33,6 +33,11 @@
  *
  */
 
+
+#ifdef __linux__
+#define _BSD_SOURCE
+#endif
+
 #include <switch.h>
 #include <switch_version.h>
 #include "private/switch_core_pvt.h"
@@ -44,6 +49,7 @@
 #endif
 #include <errno.h>
 
+
 SWITCH_DECLARE_DATA switch_directories SWITCH_GLOBAL_dirs = { 0 };
 
 /* The main runtime obj we keep this hidden for ourselves */