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Top Forums Programming running a c/c++ program in unix Post 24457 by kray on Thursday 11th of July 2002 08:25:27 PM
Old 07-11-2002
running a c/c++ program in unix

This is not a question, but rather a simple how-to for
programmers who are new to the UNIX environment.

I too,am new to UNIX.
First I developed a few programs on my box and perfected them
until they were satisfactory for execution.

Problem was however, that once i compiled and all that,
it occured to me, that i was new to Unix and had no freakin
clue about how to run my apps from the command-line.

I couldn't for the life of me figure out how in the !$#@ to do this.

To experienced users, this is probably 'duh!' however, to a new
user like myself, this was all frustrating.

I spent a long time working on my little program and assumed that if it works it would run. Makes sense to me.
---------
Well, i was very wrong, and after i compiled my source file "myprogram.c" with the GNU CC compiler using the line:

cc myprogram.c

then another file appeared, called:

a.out

This was because i didn't specify a name for my program.

Having very little patients with the available documentation, I found nothing about running a program once you've created it.

So i tried typing my programs name in:

a.out [ENTER]

No good, instead i get a reply back saying:

a.out: Command not found.

I just wanted my freakin program to run.

Well, good news, it 'turns out' that prefixing the programs name with "./" works.

--thats a dot, a slash and then the programs path and name

so finally i entered:

./a.out [ENTER]

and voila! the darn thing worked.

If this seemed a bit long winded, it was.
I just hope this helps someone in the future.

late,
kray
 

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condor_compile(1)					      General Commands Manual						 condor_compile(1)

Name
       condor_compile create - a relinked executable for submission to the Standard Universe

Synopsis
       condor_compile cc | CC | gcc | f77 | g++ | ld | make | ...

Description
       Use  condor_compile to relink a program with the Condor libraries for submission into Condor's Standard Universe. The Condor libraries pro-
       vide the program with additional support, such as the capability to checkpoint, which is required in Condor's  Standard	Universe  mode	of
       operation.  condor_compile  requires  access  to the source or object code of the program to be submitted; if source or object code for the
       program is not available (i.e. only an executable binary, or if it is a shell script),  then  the  program  must  submitted  into  Condor's
       Vanilla	Universe. See the reference page for condor_submitand/or consult the "Condor Users and Administrators Manual" for further informa-
       tion.

       To use condor_compile, simply enter "condor_compile" followed by whatever you would normally enter to compile or link your application. Any
       resulting executables will have the Condor libraries linked in. For example:

	      condor_compile  cc -O -o myprogram.condor file1.c file2.c ...

       will  produce  a  binary "myprogram.condor" which is relinked for Condor, capable of checkpoint/migration/remote-system-calls, and ready to
       submit to the Standard Universe.

       If the Condor administrator has opted to fully install condor_compile, then condor_compilecan be followed by  practically  any  command	or
       program, including make or shell-script programs. For example, the following would all work:

	      condor_compile  make

	      condor_compile  make install

	      condor_compile  f77 -O mysolver.f

	      condor_compile  /bin/csh compile-me-shellscript

       If  the	Condor administrator has opted to only do a partial install of condor_compile, the you are restricted to following condor_compile-
       with one of these programs:

	      cc (the system C compiler)

	      c89 (POSIX compliant C compiler, on some systems)

	      CC (the system C++ compiler)

	      f77 (the system FORTRAN compiler)

	      gcc (the GNU C compiler)

	      g++ (the GNU C++ compiler)

	      g77 (the GNU FORTRAN compiler)

	      ld (the system linker)

       NOTE: If you use explicitly call ``ld'' when you normally create your binary, simply use:

	      condor_compile  ld <ld arguments and options>

       instead.

Exit Status
       condor_compileis a script that executes specified compilers and/or linkers. If an error is encountered before calling these other programs,
       condor_compilewill exit with a status value of 1 (one). Otherwise, the exit status will be that given by the executed program.

Author
       Condor Team, University of Wisconsin-Madison

Copyright
       Copyright  (C)  1990-2012  Condor  Team,  Computer  Sciences Department, University of Wisconsin-Madison, Madison, WI. All Rights Reserved.
       Licensed under the Apache License, Version 2.0.

       See the Condor Version 7.8.2 Manualor http://www.condorproject.org/licensefor additional notices. condor-admin@cs.wisc.edu

								  September 2012						 condor_compile(1)
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