DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:from:to:date:subject:message-id:content-type
	:content-transfer-encoding:mime-version; q=dns; s=default; b=xeV
	VzEJqSfLNF1PKqItehm0x2amBIfwjVZ01Wb0sByrw4CPu/HlJ333OWAp8/QUzMKR
	P5fLEDXBEIE81d9ihykkYKvyWG1xq0d8wzu8RDAphp1ZWdoLUw42GOuokpW3vXqU
	7wed/pNpyaCfvc5zTM1Dkr3ohjdLA25ID+ntxQq0=
Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm
Sender: cygwin-owner@cygwin.com
Mail-Followup-To: cygwin@cygwin.com
From: "Rockefeller, Harry" <Harry.Rockefeller@flightsafety.com>
To: "cygwin@cygwin.com" <cygwin@cygwin.com>
Date: Mon, 3 Feb 2014 15:39:58 -0500
Subject: gdb fortran cygwin64 readlen< 0 error
Message-ID: <3185EFAF9C8F7B4E9DBDF56829BF7C782A5D5E2279@srv060ex01.ssd.fsi.com>
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

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