I've run into a situation where jam isn't generating a temporary file when it should. I have attached a jamfile that exhibits the problem.

I build a dependency tree like this:

child father grandfather mother

It works fine until I mark father as TEMPORARY. When I do that it seems to work fine until I touch mother file. When I do that, jam tries to build child without father being present.

====================================================================== make -- all time -- all: missing make -- child time -- child: Tue Mar 14 15:46:32 2000 make -- father time -- father: parents make -- grandfather time -- grandfather: Tue Mar 14 15:45:00 2000 made stable grandfather made stable father make -- mother time -- mother: Tue Mar 14 15:54:26 2000 made* newer mother made+ old child made+ update all ...found 5 target(s)... ...updating 1 target(s)... Cat child

cat father mother > child

cat: father: No such file or directory ...failed Cat child ... ...failed updating 1 target(s)... ======================================================================

Jam knows that 'child' depends on 'father' yet it isn't rebuilding it. Is there some way I can deal with this problem?

The Jamfile I'm using to test is here...

rule Cp { DEPENDS $(<) : $(>) ; }

actions Cp { cp $(>) $(<) }

rule Cat { DEPENDS $(<) : $(>) ; }

actions together Cat { cat $(>) > $(<) }

rule RmTemps { TEMPORARY $(>) ; }

actions quietly updated piecemeal together RmTemps { rm $(>) }

rule MakeChild { Cp father : grandfather ; Cat $(<) : mother father ; RmTemps $(<) : father ; }

MakeChild child ;

DEPENDS all : child ;