"unless rule unknown"

From: ylei2 (ylei2_at_[hidden])
Date: 2005-05-01 10:34:42

Hi there, 

I got a problem in building boost. 
Boost version: 1.32.0
BJam version : 3.1.10

I downloaded the source code onto Solaris 5.8 with Gcc 333. 

First I built the jam/bjam as instructed from tools/build/jam_src,
and got my jam/bjam executable.

Then I copied those jam/bjam tools into my ~/bin directory which is on
my PATH env. 

Third, I cd to my boost src directory
and do 

bjam -fjamfile "-sTOOLS=gcc" stage

then comes out the following error message
--- error msg ----
jamfile:105: in module scope
rule unless unknown in module 

The line 105 is something like : 
local boost-locate = [ unless $(with-stage) : [ MATCH
"^--prefix=(.*)" : $(ARGV) ] : $(stage-locate) ] ;

Well, it seems this jam didn't understand unless rule. 
I have no idea whethere I should define a unless rule, 
or get another version of jam. 

I have searched the boost.org mail archive, 
seems one guy had the same question, the answer is just
what I 've done as described above. He is on Darwin, succeeded.
While I am on Solaris, and failed.

Any suggestions appreciated. 

-- Yong