6 files changed, 28 insertions, 20 deletions
diff --git a/Build/source/texk/web2c/ChangeLog b/Build/source/texk/web2c/ChangeLog
index f79873dc700..fec79642406 100644
--- a/Build/source/texk/web2c/ChangeLog
+++ b/Build/source/texk/web2c/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-27  Andreas Scherer  <https://ascherer.github.io>
+
+	* ctangleboot.cin,
+	* cwebboot.cin: Use enum'erated program identifiers.
+
 2020-04-23  Tomas Rokicki  <rokicki@gmail.com>
         and Karl Berry  <karl@freefriends.org>
 
diff --git a/Build/source/texk/web2c/ctangleboot.cin b/Build/source/texk/web2c/ctangleboot.cin
index e5fdf4dcb34..0bae9ddc675 100644
--- a/Build/source/texk/web2c/ctangleboot.cin
+++ b/Build/source/texk/web2c/ctangleboot.cin
@@ -47,10 +47,6 @@
 #define stack_size 50
 #define buf_size 1000 \
 
-#define ctangle 0
-#define cweave 1
-#define ctwill 2 \
-
 #define _(STRING) gettext(STRING)  \
 
 #define and_and 04
@@ -166,12 +162,15 @@
 #line 66 "cwebdir/ctangle.w"
 
 /*5:*/
-#line 37 "cwebdir/comm-w2c.h"
+#line 34 "cwebdir/comm-w2c.h"
 
 typedef bool boolean;
 typedef uint8_t eight_bits;
 typedef uint16_t sixteen_bits;
-extern int program;
+typedef enum{
+ctangle,cweave,ctwill
+}cweb;
+extern cweb program;
 extern int phase;
 
 /*:5*//*7:*/
diff --git a/Build/source/texk/web2c/cwebboot.cin b/Build/source/texk/web2c/cwebboot.cin
index 069fa1c3a34..c3df99cb815 100644
--- a/Build/source/texk/web2c/cwebboot.cin
+++ b/Build/source/texk/web2c/cwebboot.cin
@@ -62,10 +62,6 @@ typedef bool boolean;
 /*:90*/
 #line 59 "cwebdir/common.w"
 
-#define ctangle 0
-#define cweave 1
-#define ctwill 2 \
-
 #define and_and 04
 #define lt_lt 020
 #define gt_gt 021
@@ -188,8 +184,11 @@ err_print(_("! Include file name too long") ) ;goto restart;} \
 /*2:*/
 #line 73 "cwebdir/common.w"
 
-#line 56 "cwebdir/comm-w2c.ch"
-int program;
+#line 53 "cwebdir/comm-w2c.ch"
+typedef enum{
+ctangle,cweave,ctwill
+}cweb;
+cweb program;
 #line 76 "cwebdir/common.w"
 
 /*:2*//*6:*/
diff --git a/Build/source/texk/web2c/cwebdir/ChangeLog b/Build/source/texk/web2c/cwebdir/ChangeLog
index 3f134d9de11..2d09fae7f0c 100644
--- a/Build/source/texk/web2c/cwebdir/ChangeLog
+++ b/Build/source/texk/web2c/cwebdir/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-27  Andreas Scherer  <https://ascherer.github.io>
+
+	* comm-w2c.ch,
+	* comm-w2c.h: Use enum'erated program identifiers.
+
 2020-04-16  Andreas Scherer  <https://ascherer.github.io>
 
 	* cweav-w2c.ch,
diff --git a/Build/source/texk/web2c/cwebdir/comm-w2c.ch b/Build/source/texk/web2c/cwebdir/comm-w2c.ch
index 236d8a95c8e..c0d66bb2c9c 100644
--- a/Build/source/texk/web2c/cwebdir/comm-w2c.ch
+++ b/Build/source/texk/web2c/cwebdir/comm-w2c.ch
@@ -44,16 +44,16 @@
 @y
 |program|. And \.{CTWILL} adds some extra twists.
 
-@d ctangle 0
-@d cweave 1
-@d ctwill 2
 @z
 
 @x
 typedef short boolean;
 boolean program; /* \.{CWEAVE} or \.{CTANGLE}? */
 @y
-int program; /* \.{CWEAVE} or \.{CTANGLE} or \.{CTWILL}? */
+typedef enum {
+  ctangle, cweave, ctwill
+} cweb;
+cweb program; /* \.{CTANGLE} or \.{CWEAVE} or \.{CTWILL}? */
 @z
 
 @x
diff --git a/Build/source/texk/web2c/cwebdir/comm-w2c.h b/Build/source/texk/web2c/cwebdir/comm-w2c.h
index e03516f2bb0..e8a251f61e8 100644
--- a/Build/source/texk/web2c/cwebdir/comm-w2c.h
+++ b/Build/source/texk/web2c/cwebdir/comm-w2c.h
@@ -26,9 +26,6 @@
 
 First comes general stuff:
 
-@d ctangle 0
-@d cweave 1
-@d ctwill 2
 
 @s boolean int
 @s uint8_t int
@@ -38,7 +35,10 @@ First comes general stuff:
 typedef bool boolean;
 typedef uint8_t eight_bits;
 typedef uint16_t sixteen_bits;
-extern int program; /* \.{CWEAVE} or \.{CTANGLE} or \.{CTWILL}? */
+typedef enum {
+  ctangle, cweave, ctwill
+} cweb;
+extern cweb program; /* \.{CTANGLE} or \.{CWEAVE} or \.{CTWILL}? */
 extern int phase; /* which phase are we in? */
 
 @ You may have noticed that almost all \.{"strings"} in the \.{CWEB} sources