So here was my final solution since it appears that composite features are expanded in stages resulting in duplications of the expansions (final expansion was <test>A <test>E <define>_TEST=0 <define>_TEST=4):

 

import feature ;

 

feature.feature test : E A B C D ;

 

project : requirements  <test>A : <define>_TEST=0

                <test>B : <define>_TEST=1

<test>C : <define>_TEST=2

<test>D : <define>_TEST=3

<test>E : <define>_TEST=4  ;

 

exe main : main.c : <test>A ;       # uses A

 

exe main1 : main.c ;                        # uses E

 

 

 

 

So I tried this instead:

 

import feature ;

 

feature.feature test : E A B C D : composite optional ;

feature.compose <test>A : <define>_TEST=0 ;

feature.compose <test>B : <define>_TEST=1 ;

feature.compose <test>C : <define>_TEST=2 ;

feature.compose <test>D : <define>_TEST=3 ;

feature.compose <test>E : <define>_TEST=4 ;

 

project : default-build <test>E ;

 

exe main : main.c : <test>A ;

 

Which appears to work per my requirements but now the no-op build time is 3x-4x what it was before (for my real build  not the example above)???

 

Anyone have a better idea?

 

Chris

 

 

 

 

Hello,

 

I am doing the following:

 

import feature ;

 

feature.feature test : E A B C D : composite ;

feature.compose <test>A : <define>_TEST=0 ;

feature.compose <test>B : <define>_TEST=1 ;

feature.compose <test>C : <define>_TEST=2 ;

feature.compose <test>D : <define>_TEST=3 ;

feature.compose <test>E : <define>_TEST=4 ;

 

exe main : main.c : <test>A ;

 

And for some reason, _TEST=4 is always set even though I am specifying that <test>A  (_TEST=0 is also set) should be used. I am obviously misunderstanding the documentation regarding the default value of test since I would have expected it to not be used in this case.  Can someone explain why this is happening and how I can have a default value set when <test> is not specified but when it is specified, have it use the specified value not the default?

 

$ boost-build/bin/bjam.exe -d2 -a

...found 11 targets...

...updating 3 targets...

 

file bin\msvc-8.0\debug\test-A\threading-multi\main.obj.rsp

"main.c" -Fo"bin\msvc-8.0\debug\test-A\threading-multi\main.obj"    -TC /Z7 /Od /Ob0 /W3 /GR /MDd /Zc:forScope /Zc:wchar_t -c

-D_TEST=0

-D_TEST=4

compile-c-c++ bin\msvc-8.0\debug\test-A\threading-multi\main.obj

 

    call "C:\Program Files (x86)\Microsoft Visual Studio 8\VC\vcvarsall.bat" x86 >nul

cl /Zm800 -nologo @"bin\msvc-8.0\debug\test-A\threading-multi\main.obj.rsp"

 

main.c

 

file bin\msvc-8.0\debug\test-A\threading-multi\main.exe.rsp

 

"bin\msvc-8.0\debug\test-A\threading-multi\main.obj"

msvc.link bin\msvc-8.0\debug\test-A\threading-multi\main.exe

 

        call "C:\Program Files (x86)\Microsoft Visual Studio 8\VC\vcvarsall.bat" x86 >nul

link /NOLOGO /INCREMENTAL:NO /DEBUG /MACHINE:X86 /subsystem:console /out:"bin\msvc-8.0\debug\test-A\threading-multi\main.exe"   @"bin\msvc-8.0\debug\test-A\threading-multi\main.exe.rsp"

        if %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL%

 

msvc.manifest bin\msvc-8.0\debug\test-A\threading-multi\main.exe

 

        if exist "bin\msvc-8.0\debug\test-A\threading-multi\main.exe.manifest" (

            call "C:\Program Files (x86)\Microsoft Visual Studio 8\VC\vcvarsall.bat" x86 >nul

mt -nologo -manifest "bin\msvc-8.0\debug\test-A\threading-multi\main.exe.manifest" "-outputresource:bin\msvc-8.0\debug\test-A\threading-multi\main.exe;1"

        )

 

...updated 3 targets...

 

Thanks,

 

Chris