12-17-2010
Compiling with debugger flag -g fixes SEGfault (fortran90)
So the title kinda says it all. I was getting a SEGfault, so I decided to compile with the -g option to find where, and low and behold the SEGfault doesn't occur.
I suppose the answer is "Problem solved! You fixed yet another SEGfault." But I am very curious how this could have happened.
Some info that may help:
1 At first the executable instantly killed itself. After removing some unnecessary variables from the header file, this was fixed. (stack overflow i assume)
2 This is the full compilation command:
ifort -r8 -i4 -mcmodel=large -i-dynamic -align all -g -o code code.f90
3 When compiling without debugger flag messages informing me that loops have been vectorized are printed to screen. Nothing is printed to screen when I compile WITH '-g'.
Thanks!
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IDLE(1) General Commands Manual IDLE(1)
NAME
IDLE - An Integrated DeveLopment Environment for Python
SYNTAX
idle [ -dins ] [ -t title ] [ file ...]
idle [ -dins ] [ -t title ] ( -c cmd | -r file ) [ arg ...]
idle [ -dins ] [ -t title ] - [ arg ...]
DESCRIPTION
This manual page documents briefly the idle command. This manual page was written for Debian because the original program does not have a
manual page. For more information, refer to IDLE's help menu.
IDLE is an Integrated DeveLopment Environment for Python. IDLE is based on Tkinter, Python's bindings to the Tk widget set. Features are
100% pure Python, multi-windows with multiple undo and Python colorizing, a Python shell window subclass, a debugger. IDLE is cross-plat-
form, i.e. it works on all platforms where Tk is installed.
OPTIONS
-h Print this help message and exit.
-n Run IDLE without a subprocess (see Help/IDLE Help for details).
The following options will override the IDLE 'settings' configuration:
-e Open an edit window.
-i Open a shell window.
The following options imply -i and will open a shell:
-c cmd Run the command in a shell, or
-r file
Run script from file.
-d Enable the debugger.
-s Run $IDLESTARTUP or $PYTHONSTARTUP before anything else.
-t title
Set title of shell window.
A default edit window will be bypassed when -c, -r, or - are used.
[arg]* and [file]* are passed to the command (-c) or script (-r) in sys.argv[1:].
EXAMPLES
idle Open an edit window or shell depending on IDLE's configuration.
idle foo.py foobar.py
Edit the files, also open a shell if configured to start with shell.
idle -est "Baz" foo.py
Run $IDLESTARTUP or $PYTHONSTARTUP, edit foo.py, and open a shell window with the title "Baz".
idle -c "import sys; print sys.argv" "foo"
Open a shell window and run the command, passing "-c" in sys.argv[0] and "foo" in sys.argv[1].
idle -d -s -r foo.py "Hello World"
Open a shell window, run a startup script, enable the debugger, and run foo.py, passing "foo.py" in sys.argv[0] and "Hello World" in
sys.argv[1].
echo "import sys; print sys.argv" | idle - "foobar"
Open a shell window, run the script piped in, passing '' in sys.argv[0] and "foobar" in sys.argv[1].
SEE ALSO
python(1).
AUTHORS
Various.
21 September 2004 IDLE(1)