3 files changed, 13 insertions, 0 deletions

diff --git a/src/s/vms.h b/src/s/vms.h
index dc7877eaa67..1338cdb5718 100644
--- a/src/s/vms.h
+++ b/src/s/vms.h
@@ -109,6 +109,11 @@ Boston, MA 02111-1307, USA.  */
    your system and must be used only through an encapsulation
    (Which you should place, by convention, in sysdep.c).  */
 
+/* In olden days, VMS filenames did not support hyphen (i.e., the "-"
+   character).  You can #undef this in vmsX-Y.h for newer versions.  */
+
+#define NO_HYPHENS_IN_FILENAMES
+
 /* Do you have the sharable library bug?  If you link with a sharable
    library that contains psects with the NOSHR attribute and also refer to
    those psects in your program, the linker give you a private version of
@@ -135,6 +140,10 @@ Boston, MA 02111-1307, USA.  */
 
 /* #define READ_SYSUAF */
 
+/* Traditionally, filenames on VMS are always upper case.  */
+
+#define FILE_SYSTEM_CASE Fupcase
+
 /* On VMS these have a different name */
 
 #define index strchr
diff --git a/src/s/vms4-4.h b/src/s/vms4-4.h
index 0abd8259143..7491f5c8f80 100644
--- a/src/s/vms4-4.h
+++ b/src/s/vms4-4.h
@@ -1,5 +1,7 @@
 #include "vms.h"
 #define VMS4_4
 
+#undef NO_HYPHENS_IN_FILENAMES
+
 /* arch-tag: 2e65c7ad-0d17-45a0-b4cb-3e76c72ea9d5
    (do not change this comment) */
diff --git a/src/s/vms5-5.h b/src/s/vms5-5.h
index ac0ba9461a2..83b08b42813 100644
--- a/src/s/vms5-5.h
+++ b/src/s/vms5-5.h
@@ -2,6 +2,8 @@
 #define VMS5_5
 #define VMS4_4
 
+#undef NO_HYPHENS_IN_FILENAMES
+
 /* The bug that SHARABLE_LIB_BUG fixes is gone in version 5.5 of VMS.
    And defining it causes lossage because sys_errlist has a different
    number of elements.  */