[Boost-build] target dependency question

From: Robert Ramey (ramey_at_[hidden])
Date: 2007-08-05 23:35:53

I would like to express the following idea in bjam.

I would like to restrict the building of the serialization library (and dll) 
to those system
which support wide character i/o

I would also like to restrict the usage of the libraries to programs 
compiled with
compilers and libraries which support the wchar type (be it intrinsic or 
not)

The config library has a test for exactly this.  Soo I would hope that I 
could
condition the building of this library (and later the running of tests) on 
the
corresponding config test passing.  The following is what I came up with
but it doesn't seem to work.

Of course the motivation here is the skip offer builds and tests none
apriori to yield no useful result.

Any suggestions appreciated.

Robert Ramey

lib boost_wserialization
        : $(WSOURCES).cpp boost_serialization 
../../config/test//BOOST_NO_STD_WSTREAMBUF
 : <toolset>msvc:<cxxflags>/Gy
          # note - we can't use <inlcude>$(SPIRIT_ROOT) because
          # it puts -I$(SPIRIT_ROOT) AFTER the "../../.." in the command 
line.
          # so use these instead
          <toolset>msvc-6.5:<cxxflags>-I$(SPIRIT_ROOT)
          <toolset>msvc-7.0:<cxxflags>-I$(SPIRIT_ROOT)
          <toolset>borland:<cxxflags>-I$(SPIRIT_ROOT)
        :
          # usage requirmentsonly environments which support wchar_t should 
use this
          ../../config/test//BOOST_NO_CWCHAR
 ;