1 files changed, 48 insertions, 0 deletions
diff --git a/libphobos/libdruntime/core/sys/posix/unistd.d b/libphobos/libdruntime/core/sys/posix/unistd.d
index a691884cb2e..d996556fca0 100644
--- a/libphobos/libdruntime/core/sys/posix/unistd.d
+++ b/libphobos/libdruntime/core/sys/posix/unistd.d
@@ -2722,3 +2722,51 @@ else version (CRuntime_UClibc)
     int        truncate(const scope char*, off_t);
   }
 }
+
+// Non-standard definition to access user process environment
+version (CRuntime_Glibc)
+{
+    extern __gshared const char** environ;
+}
+else version (Darwin)
+{
+    extern (D) @property const(char**) environ()()
+    {
+        pragma (inline, true);
+        import core.sys.darwin.crt_externs : _NSGetEnviron;
+        return *_NSGetEnviron();
+    }
+}
+else version (FreeBSD)
+{
+    extern __gshared const char** environ;
+}
+else version (NetBSD)
+{
+    extern __gshared const char** environ;
+}
+else version (OpenBSD)
+{
+    extern __gshared const char** environ;
+}
+else version (DragonFlyBSD)
+{
+    extern __gshared const char** environ;
+}
+else version (CRuntime_Bionic)
+{
+    extern __gshared const char** environ;
+}
+else version (CRuntime_Musl)
+{
+    extern __gshared const char** environ;
+}
+else version (Solaris)
+{
+    extern __gshared const char** environ;
+}
+else version (CRuntime_UClibc)
+{
+    extern __gshared const char** __environ;
+    alias environ = __environ;
+}