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Date: Mon, 29 Sep 2014 14:13:33 +0200
From: =?windows-1252?Q?Dominik_Stra=DFer?= <dominik DOT strasser AT onespin-solutions DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: gdb 7.8 consistently fails to run executable - error is
References: <1408580171694-110722 DOT post AT n5 DOT nabble DOT com> <loom DOT 20140821T100019-590 AT post DOT gmane DOT org> <1408732343936-110800 DOT post AT n5 DOT nabble DOT com> <5423F775 DOT 7030208 AT onespin-solutions DOT com>
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Hi all,
I've dug into the gdb sources.
The problem is in the cygwin-only part and is not about the PATH
variable but about one single DLL file name.

This path length is *fixed* to 512 characters (SO_NAME_MAX_PATH_SIZE)
for the *realpath* of the DLL.

So there's no way for the user to work around this apart from shortening
the directory or file names.

Best regards

Dominik

Am 25.09.2014 um 13:07 schrieb Dominik Straßer:
> Hi,
> I am running into the same issue.
> My path is stripped down as far as possible:
> $ echo $PATH
> /usr/local/bin:/usr/bin
> 
> But still no cigar.
> 
> $ gdb
> /local/night/fizz_build_Win7_with_icons/libraries/compilelib/unittest/exec/cygwin64/MINGW/normal_mt_so/unittest.exe
> GNU gdb (GDB) 7.8
> Copyright (C) 2014 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-pc-cygwin".
> Type "show configuration" for configuration details.
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>.
> Find the GDB manual and other documentation resources online at:
> <http://www.gnu.org/software/gdb/documentation/>.
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from
> /local/night/fizz_build_Win7_with_icons/libraries/compilelib/unittest/exec/cygwin64/MINGW/normal_mt_so/unittest.exe...done.
> (gdb) r
> Starting program:
> /local/night/fizz_build_Win7_with_icons/libraries/compilelib/unittest/exec/cygwin64/MINGW/normal_mt_so/unittest.exe
> [New Thread 30016.0x7544]
> dll path too long
> 
> strace revealend nothing.
> 
> Unfortunately MinGW's gdb doesn't work for other reasons, so I am back
> to printf :-(
> 
> Regards
> 
> Dominik
> 
> Am 22.08.2014 um 20:32 schrieb DGStevens:
>> Hi Achim-
>>
>> Thanks.  Unfortunately, the change didn't seem to help regarding my issue
>> with GDB.  I don't know if it matters, but I fired up an old computer
>> running XP.  I updated all of the Cygwin software, and tried the same test. 
>> It worked fine on XP, but it seems to fail on Win7, at least for me.
>>
>> FWIW, I tried manually trimming the path to just:
>>
>> $> echo $PATH
>> .:/home/Deans/bin:/usr/local/bin:/usr/bin
>>
>> ...
>>
>> $> cygcheck -s
>>
>> Cygwin Configuration Diagnostics
>> Current System Time: Fri Aug 22 00:02:07 2014
>>
>> Windows 7 Professional Ver 6.1 Build 7601 Service Pack 1
>>
>> Running under WOW64 on AMD64
>>
>> Path:   .
>>         C:\cygwin\home\Deans\bin
>>         C:\cygwin\usr\local\bin
>>         C:\cygwin\bin
>> ...
>>
>>
>>
>>
>> --
>> View this message in context: http://cygwin.1069669.n5.nabble.com/gdb-7-8-consistently-fails-to-run-executable-error-is-dll-path-too-long-tp110722p110800.html
>> Sent from the Cygwin list mailing list archive at Nabble.com.
>>
>> --
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> 

-- 
Dominik Strasser       | Phone:  +49 89 99013-436
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