gdb 7.8 consistently fails to run executable - error is "dll path too long"

Thu Aug 21 00:16:00 GMT 2014

I'm unable to use gdb on any c/c++ executables.  When I try, gdb issues the
message "dll path too long" and fails to start the target executable.

I know that I must be doing something stupid, but it's escaping me.  The
only forum discussion that I could find suggested using mintty, which I am. 
I did see mention of a known bug in gdb, but no suggested workarounds, other
than running in mintty.

The following test case is the simplest that I could manage.  I see the same
failure with both 'C' and C++ files (gcc and g++, respectively).

I'm running Win7, with the old 32-bit cygwin.  cygcheck.txt should be

$> cat gdbtst.c
#include <stdio.h>

int main(int argc, char *argv[]) {
  printf("Hello World!\n");

$> gcc --version
gcc (GCC) 4.8.3
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO

$> gcc -g gdbtst.c -o gdbtst.exe
$> gdbtst.exe
Hello World!
$> gdb gdbtst.exe
GNU gdb (GDB) 7.8
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
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 "i686-pc-cygwin".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
Find the GDB manual and other documentation resources online at:
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from gdbtst.exe...done.
(gdb) break main
Breakpoint 1 at 0x4011be: file gdbtst.c, line 4.
(gdb) step
The program is not being run.
(gdb) run
Starting program: /home/Deans/SBX/Samples/gdbtst.exe
[New Thread 34472.0x8ad8]
dll path too long
(gdb) step
Cannot execute this command while the selected thread is running.
(gdb) quit
A debugging session is active.

        Inferior 1 [process 34472] will be killed.

Quit anyway? (y or n) y
$> cygcheck -s -v -r >cygcheck.txt

cygcheck.txt <>  

View this message in context:
Sent from the Cygwin list mailing list archive at

Problem reports:
Unsubscribe info:

More information about the Cygwin mailing list