diff --git a/scsh/aix/sysdep.h b/scsh/aix/sysdep.h
deleted file mode 100644
index 3f09423..0000000
--- a/scsh/aix/sysdep.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#undef HAVE_DLOPEN
-
-#undef HAVE_TZNAME
-#define HAVE_TZNAME
diff --git a/scsh/bsd/sysdep.h b/scsh/bsd/sysdep.h
deleted file mode 100644
index e69de29..0000000
diff --git a/scsh/bsd/time_dep1.c b/scsh/bsd/time_dep1.c
index 87be152..00aadfc 100644
--- a/scsh/bsd/time_dep1.c
+++ b/scsh/bsd/time_dep1.c
@@ -15,7 +15,6 @@
 s48_value time_plus_ticks()
 {
     struct timeval t;
-    struct timezone tz;
     s48_value sch_tv_sec = S48_UNSPECIFIC;
     s48_value sch_tv_usec = S48_UNSPECIFIC;
     s48_value sch_listval = S48_UNSPECIFIC;
@@ -24,7 +23,7 @@ s48_value time_plus_ticks()
     
     S48_GC_PROTECT_3(sch_tv_sec, sch_tv_usec, sch_listval);
 
-    if( gettimeofday(&t, &tz) ) s48_raise_os_error (errno);
+    if( gettimeofday(&t, NULL) ) s48_raise_os_error (errno);
 
 
     sch_tv_sec = s48_enter_integer(t.tv_sec);
diff --git a/scsh/cygwin32/sysdep.h b/scsh/cygwin32/sysdep.h
deleted file mode 100644
index 3d683f2..0000000
--- a/scsh/cygwin32/sysdep.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* Cygwin's adds _'s but making configure.in know about dlltool seemed evil */
-#define DLSYM_ADDS_USCORE
diff --git a/scsh/generic/sysdep.h b/scsh/generic/sysdep.h
deleted file mode 100644
index e69de29..0000000
diff --git a/scsh/gnu/sysdep.h b/scsh/gnu/sysdep.h
deleted file mode 100644
index c9bd059..0000000
--- a/scsh/gnu/sysdep.h
+++ /dev/null
@@ -1 +0,0 @@
-/* Make `diff' happy. */
diff --git a/scsh/hpux/sysdep.h b/scsh/hpux/sysdep.h
deleted file mode 100644
index e69de29..0000000
diff --git a/scsh/irix/sysdep.h b/scsh/irix/sysdep.h
deleted file mode 100644
index e69de29..0000000
diff --git a/scsh/linux/sysdep.h b/scsh/linux/sysdep.h
deleted file mode 100644
index e69de29..0000000
diff --git a/scsh/next/sysdep.h b/scsh/next/sysdep.h
deleted file mode 100644
index c349f59..0000000
--- a/scsh/next/sysdep.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#undef HAVE_SIGACTION
-#define HAVE_SIGACTION
diff --git a/scsh/solaris/sysdep.h b/scsh/solaris/sysdep.h
deleted file mode 100644
index a7644ba..0000000
--- a/scsh/solaris/sysdep.h
+++ /dev/null
@@ -1 +0,0 @@
-#undef HAVE_DLOPEN
diff --git a/scsh/sunos/sysdep.h b/scsh/sunos/sysdep.h
deleted file mode 100644
index e69de29..0000000
diff --git a/scsh/syscalls1.c b/scsh/syscalls1.c
index 5515be6..4df8650 100644
--- a/scsh/syscalls1.c
+++ b/scsh/syscalls1.c
@@ -671,7 +671,9 @@ s48_value scsh_fsync(s48_value sch_fdes)
 
 s48_value scsh_sync()
 {
+#ifdef HAVE_SYNC
   sync();
+#endif
   return S48_UNSPECIFIC;
 }