Bug 1303

Summary:	waf recompiles all the scripts in the scratch directory when adding a new one
Product:	ns-3	Reporter:	Eric Gamess <egamess>
Component:	build system	Assignee:	Gustavo J. A. M. Carneiro <gjcarneiro>
Status:	RESOLVED WONTFIX
Severity:	minor	CC:	ns-bugs, tommaso.pecorella
Priority:	P5
Version:	pre-release
Hardware:	All
OS:	All

Description Eric Gamess 2011-11-22 09:12:13 UTC

Hello,

I just tried ns-3-dev (November 22, 2011). Just in
case, I am using Debian 6.0.3, but I think this bug is in
all platforms. Every time I compile a script in the
scratch directory, it compiles all the scripts in the
scratch directory.

Just do this simple experiment:
   cd ns-3-dev
   cp examples/tutorial/first.cc scratch/script1.cc
   ./waf --run scratch/script1
   # This compile scratch/script1.cc. It is OK.

   cp examples/tutorial/first.cc scratch/script2.cc
   ./waf --run scratch/script2
   # Now, this compile script1.cc and script2.cc.
   # It should only compile script2.cc.

   cp examples/tutorial/first.cc scratch/script3.cc
   ./waf --run scratch/script3
   # Now, this compile script1.cc, script2.cc, and script3.cc.
   # It should only compile script3.cc

Thank you.

Eric.

Comment 1 Gustavo J. A. M. Carneiro 2012-02-13 14:10:17 UTC

(In reply to comment #0)
> Hello,
> 
> I just tried ns-3-dev (November 22, 2011). Just in
> case, I am using Debian 6.0.3, but I think this bug is in
> all platforms. Every time I compile a script in the
> scratch directory, it compiles all the scripts in the
> scratch directory.
> 
> Just do this simple experiment:
>    cd ns-3-dev
>    cp examples/tutorial/first.cc scratch/script1.cc
>    ./waf --run scratch/script1
>    # This compile scratch/script1.cc. It is OK.
> 
>    cp examples/tutorial/first.cc scratch/script2.cc
>    ./waf --run scratch/script2
>    # Now, this compile script1.cc and script2.cc.
>    # It should only compile script2.cc.
> 


I reproduce this problem.  It sounds like a bug in WAF, which I have no time to fix.

However, if I modify script2 and then try to run it, WAF builds only script2 and none of the other scratch programs.  THis is not so bad.

Comment 2 Gustavo J. A. M. Carneiro 2012-02-20 07:08:49 UTC

Reducing severity: the problem occurs only when adding new programs to the scratch folder, not when modifying existing ones.  So it doesn't sound so big problem...

Comment 3 Tommaso Pecorella 2013-08-06 14:14:27 UTC

Documented "bugs" are called "features".
This is a feature.