Add option to configure comint TERM

* lisp/comint.el (comint-terminfo-terminal): New defcustom.
(comint-term-environment): New function for setting terminal options
(comint-exec-1): Use comint-term-environment.  (Bug#29583)
* lisp/progmodes/compile.el (compilation-start): Use comint-term-environment.

* etc/NEWS:
* doc/emacs/misc.texi (Shell Options): Document the new option.

1 files changed, 9 insertions, 0 deletions

diff --git a/doc/emacs/misc.texi b/doc/emacs/misc.texi
index 6ad5fbafdd6..b6b396af8f5 100644
--- a/doc/emacs/misc.texi
+++ b/doc/emacs/misc.texi
@@ -1396,6 +1396,15 @@ directory stack if they are not already on it
 (@code{shell-pushd-dunique}).  The values you choose should match the
 underlying shell, of course.
 
+@vindex comint-terminfo-terminal
+Comint mode sets the @env{TERM} environment variable to a safe default
+value, but this value disables some useful features.  For example,
+color is disabled for applications that use @env{TERM} to determine if
+color is supported.  Therefore, Emacs provides an option
+@code{comint-terminfo-terminal}, which you can set to a terminal that
+is present in your system's terminfo database, in order to take
+advantage of advanced features of that terminal.
+
 @node Terminal emulator
 @subsection Emacs Terminal Emulator
 @findex term