cygwin mingw crosscompiler / readline bug

cygwin mingw crosscompiler / readline bug

[Alexander Voropay]

Hi!

I'm trying to compile a standalone Windows-32 console application
using 'readline' with cygwin's  'i686-w64-mingw32-gcc' crosscompiler.

I have a bug: readline repeates every input line to STDOUT on
Windows-32 application (running from the CMD.EXE, outside a Cygwin)
==
C:\TEMP\readline>readl
enter a string> sadsad
sadsad
You entered: sadsad
enter a string> aa  asd
aa  asd
You entered: aa  asd
enter a string> ^D

C:\TEMP\readline>
==
Note the CMD command prompt. All needed DLLs are transferred to the application
directory
C:\TEMP\readline>dir
..
28.10.2019  16:53    <DIR>          .
28.10.2019  16:53    <DIR>          ..
26.12.2018  05:42            94 208 libgcc_s_sjlj-1.dll
05.12.2017  12:18           411 648 libncursesw6.dll
12.01.2017  05:52           180 224 libreadline7.dll
05.01.2019  17:09            48 659 libwinpthread-1.dll
28.10.2019  10:53               313 readl.c
28.10.2019  16:53           159 266 readl.exe


This program behaves _differently_ on the Cygwin terminal being
compiles with 'gcc'
==
$ ./readl.exe
enter a string> sadsad
You entered: sadsad
enter a string> aa asd
You entered: aa asd
enter a string>
$
==


My application:
===
#include<stdlib.h>
#include<stdio.h>
#include<readline/readline.h>
#include<readline/history.h>

int main(){
char* line;
while (1) {
   line = readline("enter a string> ");
   add_history(line);
   if(line != NULL) {
       printf("You entered: %s\n", line);
       free(line);
   }else{
       break;}
   }
}
===

Command line to compile under 'mingw' crosscompiler:
$ i686-w64-mingw32-gcc -o readl readl.c -lreadline

Command line for Cygwin:
$ gcc -o readl readl.c -lreadline

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Re: cygwin mingw crosscompiler / readline bug

[Alexander Voropay]

Auto-answer..he-he...

> I'm trying to compile a standalone Windows-32 console application
> using 'readline' with cygwin's  'i686-w64-mingw32-gcc' crosscompiler.
>
> I have a bug: readline repeates every input line to STDOUT on
> Windows-32 application (running from the CMD.EXE, outside a Cygwin)

'readline' library requires terminal-specific functions like
tputs()/tgetnum() e.t.c.
and should be linked with old-good 'libtermcap' (not provides with Cygwin now)
or with more recent curses library i.e. 'ncurses' or 'pdcurses'.

On the Cygwin's 'i686-w64-mingw32-gcc' crosscompiler 'libreadline' depends
on the 'ncurses' which has special support for Win32 console 'terminal'.
To enable Win32 console support set a TERM environment:

set TERM=#win32console

(yes! with # character)

--
-=AV=-

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