Re: Readline on Windows (WAS: Re: [PATCH v2 0/2] MI: Add new command -complete]

On Mon, 2019-03-11 at 16:43 +0200, Eli Zaretskii wrote:
> > From: Jan Vrany <[email protected]>
> > Cc: [email protected], [email protected], [email protected]
> > Date: Mon, 11 Mar 2019 08:45:55 +0000
> > 
> > Ah, sorry, I should have been more clear. I meant that it does not work
> > for me EVEN when on standard console so I doubted it would work better over 
> > pipes much better.
> > 
> > All the problems I described do happen when using standard console and never
> > worked no matter which GDB I used (compiled by myself or by some third party).
> 
> That's strange.  Do you have some curses library installed, and if so,
> does it get linked into GDB?

No, this is the output of ldd:

      ntdll.dll => /c/WINDOWS/SYSTEM32/ntdll.dll (0x7fffba1c0000)
        KERNEL32.DLL => /c/WINDOWS/System32/KERNEL32.DLL (0x7fffb9520000)
        KERNELBASE.dll => /c/WINDOWS/System32/KERNELBASE.dll (0x7fffb6630000)
        msvcrt.dll => /c/WINDOWS/System32/msvcrt.dll (0x7fffb9770000)
        USER32.dll => /c/WINDOWS/System32/USER32.dll (0x7fffb95e0000)
        win32u.dll => /c/WINDOWS/System32/win32u.dll (0x7fffb7520000)
        GDI32.dll => /c/WINDOWS/System32/GDI32.dll (0x7fffb7d70000)
        gdi32full.dll => /c/WINDOWS/System32/gdi32full.dll (0x7fffb7280000)
        msvcp_win.dll => /c/WINDOWS/System32/msvcp_win.dll (0x7fffb6590000)
        ucrtbase.dll => /c/WINDOWS/System32/ucrtbase.dll (0x7fffb7420000)
        WS2_32.dll => /c/WINDOWS/System32/WS2_32.dll (0x7fffb9a50000)
        RPCRT4.dll => /c/WINDOWS/System32/RPCRT4.dll (0x7fffb77e0000)
        libgmp-10.dll => /mingw64/bin/libgmp-10.dll (0x6acc0000)
        libiconv-2.dll => /mingw64/bin/libiconv-2.dll (0x66000000)
        libintl-8.dll => /mingw64/bin/libintl-8.dll (0x61cc0000)
        ADVAPI32.dll => /c/WINDOWS/System32/ADVAPI32.dll (0x7fffb7e70000)
        sechost.dll => /c/WINDOWS/System32/sechost.dll (0x7fffb9460000)
        libexpat-1.dll => /mingw64/bin/libexpat-1.dll (0x68f40000)
        liblzma-5.dll => /mingw64/bin/liblzma-5.dll (0x63cc0000)
        libpython3.7m.dll => /mingw64/bin/libpython3.7m.dll (0x62300000)
        libwinpthread-1.dll => /mingw64/bin/libwinpthread-1.dll (0x64940000)
        VERSION.dll => /c/WINDOWS/SYSTEM32/VERSION.dll (0x7fffa9ac0000)
> 

> > > Do you perhaps have a ~/.inputrc file, or some other local
> > > customization, which might affect how Readline works? 
> > 
> > Not that I know of. There's no ".inputrc" nor "inputrc" on my Windows filesystem.
> > I believe GDB compiled by myself uses the readline that comes with GDB.
> 
> The .inputrc file doesn't come with Readline, it is a user init file
> that you yourself can create to customize how input through readline
> works.

I know. I just double checked that there is none accidentally created.

> 
> I compile GDB myself as well, also with its bundled readline, I use
> GDB in the Windows console all the time, and I have no problems like
> the ones you describe.  Very strange.

Strange indeed - but it is also good because this means that it "can". 

So I dug deeper and found --with-system-readline option (funny enough
configure --help does not mention it) and voila, with this config
it works well. This is ldd from "good" GDB: 

ntdll.dll => /c/WINDOWS/SYSTEM32/ntdll.dll (0x7fffba1c0000)
        KERNEL32.DLL => /c/WINDOWS/System32/KERNEL32.DLL (0x7fffb9520000)
        KERNELBASE.dll => /c/WINDOWS/System32/KERNELBASE.dll (0x7fffb6630000)
        msvcrt.dll => /c/WINDOWS/System32/msvcrt.dll (0x7fffb9770000)
        USER32.dll => /c/WINDOWS/System32/USER32.dll (0x7fffb95e0000)
        win32u.dll => /c/WINDOWS/System32/win32u.dll (0x7fffb7520000)
        GDI32.dll => /c/WINDOWS/System32/GDI32.dll (0x7fffb7d70000)
        gdi32full.dll => /c/WINDOWS/System32/gdi32full.dll (0x7fffb7280000)
        msvcp_win.dll => /c/WINDOWS/System32/msvcp_win.dll (0x7fffb6590000)
        ucrtbase.dll => /c/WINDOWS/System32/ucrtbase.dll (0x7fffb7420000)
        WS2_32.dll => /c/WINDOWS/System32/WS2_32.dll (0x7fffb9a50000)
        RPCRT4.dll => /c/WINDOWS/System32/RPCRT4.dll (0x7fffb77e0000)
        libgmp-10.dll => /mingw64/bin/libgmp-10.dll (0x6acc0000)
        libexpat-1.dll => /mingw64/bin/libexpat-1.dll (0x68f40000)
        libiconv-2.dll => /mingw64/bin/libiconv-2.dll (0x66000000)
        libintl-8.dll => /mingw64/bin/libintl-8.dll (0x61cc0000)
        ADVAPI32.dll => /c/WINDOWS/System32/ADVAPI32.dll (0x7fffb7e70000)
        sechost.dll => /c/WINDOWS/System32/sechost.dll (0x7fffb9460000)
        liblzma-5.dll => /mingw64/bin/liblzma-5.dll (0x63cc0000)
        libreadline7.dll => /mingw64/bin/libreadline7.dll (0x6e780000)
        libwinpthread-1.dll => /mingw64/bin/libwinpthread-1.dll (0x64940000)
        libpython3.7m.dll => /mingw64/bin/libpython3.7m.dll (0x62300000)
        VERSION.dll => /c/WINDOWS/SYSTEM32/VERSION.dll (0x7fffa9ac0000)
        libtermcap-0.dll => /mingw64/bin/libtermcap-0.dll (0x6ac40000)

One problem less. Not that it explains why bundled readline
does not work for me and does for you, but at least I can produce more usable 
gdb on Windows. Thanks a lot! 

Jan