[Scons-users] implicite include dependencies is not working in scons-2.x.x

[Ronny De Clerck]

As from version 2 of scons a source file is not rebuild in case a dependent include file is changed. In version 1.3.1 the rebuilding is done correctly. Following is the output of a very small test that seems to confirm  this.

 

+ python --version

Python 2.7.3

 

+ scons --version

[?1034hSCons by Steven Knight et al.:

                script: v1.3.1.r5110, 2010/07/25 16:14:38, by bdeegan on cooldog

                engine: v1.3.1.r5110, 2010/07/25 16:14:38, by bdeegan on cooldog

Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 The SCons Foundation

 

+ cat main.cpp

#include "main.h"

int main()

{

                return RETURNVALUE;

}

 

+ cat main.h

#define RETURNVALUE 0

 

+ cat SConstruct

Program('main.cpp')

 

+ scons --tree=all

[?1034hscons: Reading SConscript files ...

scons: done reading SConscript files.

scons: Building targets ...

g++ -o main.o -c main.cpp

g++ -o main.exe main.o

+-.

  +-main.cpp

  +-main.exe

  | +-main.o

  | | +-main.cpp

  | | +-main.h

  | | +-/bin/g++

  | +-/bin/g++

  +-main.h

  +-main.o

  | +-main.cpp

  | +-main.h

  | +-/bin/g++

  +-SConstruct

scons: done building targets.

 

+ scons

[?1034hscons: Reading SConscript files ...

scons: done reading SConscript files.

scons: Building targets ...

scons: `.' is up to date.

scons: done building targets.

 

+ echo rubbish > main.h

 

+ scons

[?1034hscons: Reading SConscript files ...

scons: done reading SConscript files.

scons: Building targets ...

g++ -o main.o -c main.cpp

In file included from main.cpp:1:0:

main.h:1:1: error: ‘rubbish’ does not name a type

rubbish

^

scons: *** [main.o] Error 1

scons: building terminated because of errors.

 

 

<<< install version 2.3.0 of scons

<<< remove .o, .exe, .socnsign.dblite

<<< repair main.h

 

+ scons --version

[?1034hSCons by Steven Knight et al.:

                script: v2.3.0, 2013/03/03 09:48:35, by garyo on reepicheep

                engine: v2.3.0, 2013/03/03 09:48:35, by garyo on reepicheep

                engine path: ['/usr/lib/scons-2.3.0/SCons']

Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 The SCons Foundation

 

+ scons --tree=all

[?1034hscons: Reading SConscript files ...

scons: done reading SConscript files.

scons: Building targets ...

g++ -o main.o -c main.cpp

g++ -o main.exe main.o

+-.

  +-main.cpp

  +-main.exe

  | +-main.o                                        <<<< There is no main.h dependency !!!

  | | +-main.cpp

  | | +-/bin/g++

  | +-/bin/g++

  +-main.o

  | +-main.cpp

  | +-/bin/g++

  +-SConstruct

scons: done building targets.

 

+ scons

[?1034hscons: Reading SConscript files ...

scons: done reading SConscript files.

scons: Building targets ...

scons: `.' is up to date.

scons: done building targets.

 

+ echo rubbish > main.h

 

+ scons

[?1034hscons: Reading SConscript files ...

scons: done reading SConscript files.

scons: Building targets ...

scons: `.' is up to date.                                   <<<< main.o is not recompiled !!!

scons: done building targets.

 

 

Best regards,

Ronny.

 
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