gdb fortran cygwin64 readlen< 0 error

gdb fortran cygwin64 readlen< 0 error

[Rockefeller, Harry]

If I let gdb "run" the program under Cygwin 64 it fails.
NOTE: in Cygwin 32 gdb and this fortran work together fine.
When I run my fortran program directly it works.

 Cycle_length is defined as a 'real'.

           write(*,"('(Note: a negative test time will stop run): ',$)")
           read (*,*) cycle_length

When I run line by line using gdb I get this:

(Note: a negative test time will stop run): 39             read (*,*) cycle_length
(gdb)

[1]+  Stopped                 gdb olx.exe

harryr@HARRYR-PC ~
$ fg
gdb olx.exe

Program received signal SIGTTIN, Stopped (tty input).
_gfortrani_fbuf_read (u=0x22964c, len=0x0)
    at /usr/src/debug/gcc-4.8.2-2/libgfortran/io/fbuf.c:235
235           if (readlen < 0)

Under gdb the program acts like it moves on without keyboard input and thus
The cycle_length is never input, has zero length.
Is the Fortran syntax to antiquated for gdb to handle?
Is gdb (in 64-bit) missing something to force it to pause for keyboard input?


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

RE: gdb fortran cygwin64 readlen< 0 error

[Rockefeller, Harry]

I went back to the 32-bit Cygwin where there is no problem.

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple