[jamming] Jam - trying to get it to link executables with correct library in multiple directories

[Alex Buell]

Hi,

I've got a strange problem; Jam doesn't seem to link executables with
the required library; here's my directory structure:

Boost/
  any/
  assign/# Jamrules
  signals

Jamrules in base directory is:

JAMRULES_ALREADY_SEEN = TRUE ;

C++FLAGS =	-Wall -O3 -pipe -s ;
LINKFLAGS =	-s ;

C++	= 	g++ ;
LINK	= 	g++ ;

LIB_FS = boost_filesystem ;
LIB_SIG = boost_signals ;

Jamfile in base directory is:
SubDir TOP ;
if ! $(JAMRULES_ALREADY_SEEN)
{
	include $(TOP)/Jamrules ;
}

SubInclude TOP any ;
SubInclude TOP assign ;
SubInclude TOP filesystem ;
SubInclude TOP signals ;

The problem directories (filesystem and signals) respective Jamfiles
are:
SubDir TOP filesystem ;
if ! $(JAMRULES_ALREADY_SEEN)
{
	include $TOP/Jamrules ;
}

LINKFLAGS = -l$(LIB_FS) ;

PROGRAMS = find_file gen simple_ls try path_test ;

for t in $(PROGRAMS)
{
	Main $(t) : $(t).cpp ;
}
 
and:
SubDir TOP signals ;
if ! $(JAMRULES_ALREADY_SEEN)
{
	include $TOP/Jamrules ;
}

LINKFLAGS = -l$(LIB_SIG) ;

PROGRAMS = signal ;

for t in $(PROGRAMS) 
{
	Main $(t) : $(t).cpp ;
}

If I run Jam in both filesystem and signals, both links with the
correct libraries, but if I run Jam in base directory, it tries to link
both sets of executables with -lboost_signals (instead of only linking
with boost_filesystem in filesystem/ and boost_signals in signals/).
This is wrong. Any ideas what I am doing wrong? 
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