🚀 go-pugleaf

Ever since emacs-19.22, I have observed that shell-mode works badly on
SGI and RS/6000 hardware:

(gyrfalcon30) % date
date^M^M
Sun Oct  2 11:11:22 CDT 1994^M
(gyrfalcon30) %

Namely, echo won't turn off (even with stty -echo):

(gyrfalcon30) % stty -a
stty -a^M^M
speed 9600 baud; ; 0 rows; 0 columns^M
intr = ^C; quit = ^\; erase = ^H; kill = ^U; eof = ^D; eol <undef>^M
eol2 <undef>; start = ^Q; stop = ^S; susp = ^Z; dsusp = ^Y; reprint =
^R^M
discard = ^O; werase = ^W; lnext = ^V^M
parenb -parodd cs8 -cstopb hupcl cread -clocal -parext ^M
-ignbrk -brkint ignpar -parmrk -inpck istrip -inlcr -igncr icrnl
-iuclc ^M
ixon -ixany -ixoff -imaxbel ^M
isig icanon -xcase echo echoe echok -echonl -noflsh ^M
-tostop echoctl -echoprt echoke -flusho pending iexten ^M
opost -olcuc onlcr -ocrnl -onocr -onlret -ofill -ofdel ^M
(gyrfalcon30) % stty -echo
stty -echo^M^M
(gyrfalcon30) % date
date^M^M
Sun Oct  2 11:12:04 CDT 1994^M

The same thing happens on SGI:

(alaska) % stty -a
stty -a^M^M
speed 38400 baud; line = 1; ^M
intr = DEL; quit = ^\; erase <undef>; kill <undef>; eof = ^D; eol =
^@; old-swt\
ch = ^Z; susp = ^Z^M
lnext = ^V; werase = ^W; rprnt = ^R; flush = ^O; stop = ^S; start =
^Q; dsusp =\
 ^Y^M
-parenb -parodd cs8 -cstopb hupcl cread clocal -loblk -tostop ^M
-ignbrk brkint ignpar -parmrk -inpck istrip -inlcr -igncr icrnl -iuclc
^M
ixon ixany -ixoff -imaxbel ^M
isig icanon -xcase echo echoe echok -echoke echoctl -echonl -noflsh
-flusho -pe\
ndin ^M
opost -olcuc onlcr -ocrnl -onocr -onlret -ofill -ofdel ^M
(alaska) % stty -echo
stty -echo^M^M

However, the same build tree & configuration works correctly on a Sun4.

Version info: 

IBM RS/6000: AIX 3.2.5, occurs on models 370, 970, 41T.

GNU Emacs 19.27.2 (rs6000-ibm-aix3.2.5, X toolkit) of Sun Oct  2 1994
on crag.mcs.anl.gov

SGI: IRIX 5.2, occurs on Onyx & Indy.

GNU Emacs 19.27.2 (mips-sgi-irix5.2, X toolkit) of Sat Sep 17 1994 on
alaska.mcs.anl.gov

Sun4: SunOS 4.1.3U1 

GNU Emacs 19.27.1 (sparc-sun-sunos4.1.3_U1, X toolkit) of Sun Oct  2 1994 on 
charlotte.mcs.anl.gov


--bob