Support IBM038 (a.k.a. "EBCDIC-INT") encoding

* lisp/international/mule-conf.el (ibm038): New charset.
(ebcdic-int, cp038): Alias charsets of ibm038.
* lisp/language/english.el (ibm038): New coding-system.
(ebcdic-int, cp038): Alias coding-systems of ibm038.
(Bug#33612)

* etc/NEWS: Announce the new coding system ibm038.

etc/NEWS

@@ -1307,6 +1307,11 @@ a multibyte string even if its second argument is an ASCII character.
 ** '(format "%d" X)' no longer mishandles a floating-point number X that
 does not fit in a machine integer.
 
+---
+** New coding-system 'ibm038'.
+This is the International EBCDIC encoding, also available as aliases
+'ebcdic-int' and 'cp038'.
+
 +++
 ** In the DST slot, 'encode-time' and 'parse-time-string' now return -1
 if it is not known whether daylight saving time is in effect.

lisp/international/mule-conf.el

@@ -1066,6 +1066,15 @@
   :mime-charset 'ebcdic-uk
   :map "EBCDICUK")
 
+(define-charset 'ibm038
+  "International version of EBCDIC"
+  :short-name "IBM038"
+  :code-space [0 255]
+  :mime-charset 'ibm038
+  :map "IBM038")
+(define-charset-alias 'ebcdic-int 'ibm038)
+(define-charset-alias 'cp038 'ibm038)
+
 (define-charset 'ibm1047
   ;; Says groff:
   "IBM1047, `EBCDIC Latin 1/Open Systems' used by OS/390 Unix."

lisp/language/english.el

@@ -62,6 +62,14 @@ Nothing special is needed to handle English.")
   :mnemonic ?*)
 (define-coding-system-alias 'cp1047 'ibm1047)
 
+(define-coding-system 'ibm038
+  "International version of EBCDIC"
+  :coding-type 'charset
+  :charset-list '(ibm038)
+  :mnemonic ?*)
+(define-coding-system-alias 'ebcdic-int 'ibm038)
+(define-coding-system-alias 'cp038 'ibm038)
+
 ;; Make "ASCII" an alias of "English" language environment.
 (set-language-info-alist
  "ASCII" (cdr (assoc "English" language-info-alist)))