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From: "Rockefeller, Harry" <Harry DOT Rockefeller AT flightsafety DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Date: Mon, 3 Feb 2014 15:39:58 -0500
Subject: gdb fortran cygwin64 readlen< 0 error
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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 AT 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?


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