id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
215	Redundant target rebuilding	kucevol@…	somebody	"Version:
{{{
dkucevol@localhost> bjam --version
Boost.Build V2 (Milestone 12)
Boost.Jam 03.1.16
}}}

The example code follows:

{{{
dkucevol@localhost>cat test.h
#ifndef __TEST_H__
#define __TEST_H__

#endif // __TEST_H__

dkucevol@localhost>cat test.cpp
#include ""test.h""
int main()
{
  return 0;
}

dkucevol@localhost> cat Jamfile
exe test :
        test.cpp

: <runtime-link>static
;
}}}

And header file - test.h was touch future date:
{{{
dkucevol@localhost>ll test.h
-rw-r--r-- 1 dkucevol users 60 2009-06-26 10:00 test.h
}}}

And my test target is rebuilding permanently:). It's ok!

{{{
dkucevol@localhost> bjam test; bjam test
warning: No toolsets are configured.
warning: Configuring default toolset ""gcc"".
warning: If the default is wrong, you may not be able to build C++ programs.
warning: Use the ""--toolset=xxxxx"" option to override our guess.
warning: For more configuration options, please consult
warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html
...found 13 targets...
...updating 2 targets...
gcc.compile.c++ bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test.o
gcc.link bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test
...updated 2 targets...
warning: No toolsets are configured.
warning: Configuring default toolset ""gcc"".
warning: If the default is wrong, you may not be able to build C++ programs.
warning: Use the ""--toolset=xxxxx"" option to override our guess.
warning: For more configuration options, please consult
warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html
...found 13 targets...
...updating 2 targets...
gcc.compile.c++ bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test.o
gcc.link bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test
...updated 2 targets...
}}}


But, if i comment this header:

{{{

dkucevol@localhost> cat test.cpp
//#include ""test.h""

int main()
{
  return 0;
}
}}}

This target continued rebuilding :(.

{{{
dkucevol@localhost>bjam test; bjam test
warning: No toolsets are configured.
warning: Configuring default toolset ""gcc"".
warning: If the default is wrong, you may not be able to build C++ programs.
warning: Use the ""--toolset=xxxxx"" option to override our guess.
warning: For more configuration options, please consult
warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html
...found 13 targets...
...updating 2 targets...
gcc.compile.c++ bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test.o
gcc.link bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test
...updated 2 targets...
warning: No toolsets are configured.
warning: Configuring default toolset ""gcc"".
warning: If the default is wrong, you may not be able to build C++ programs.
warning: Use the ""--toolset=xxxxx"" option to override our guess.
warning: For more configuration options, please consult
warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html
...found 13 targets...
...updating 2 targets...
gcc.compile.c++ bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test.o
gcc.link bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test
...updated 2 targets...
}}}


But, if i removed this commenting header:
{{{
dkucevol@localhost> cat test.cpp
int main()
{
  return 0;
}
dkucevol@localhost> bjam test; bjam test
warning: No toolsets are configured.
warning: Configuring default toolset ""gcc"".
warning: If the default is wrong, you may not be able to build C++ programs.
warning: Use the ""--toolset=xxxxx"" option to override our guess.
warning: For more configuration options, please consult
warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html
...found 12 targets...
...updating 2 targets...
gcc.compile.c++ bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test.o
gcc.link bin/gcc-4.1.2/begun_v/address-model-64/link-static/runtime-link-static/threading-multi/test
...updated 2 targets...
warning: No toolsets are configured.
warning: Configuring default toolset ""gcc"".
warning: If the default is wrong, you may not be able to build C++ programs.
warning: Use the ""--toolset=xxxxx"" option to override our guess.
warning: For more configuration options, please consult
warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html
...found 12 targets...
}}}


And test target stopped rebuilding!!! :)
Looks like bjam processes even commented out headers.
"	defect	new	major	M12	component1