Jam, Boost.Build -- minor problems & patches

From: Vladimir Prus (ghost_at_[hidden])
Date: 2001-12-24 11:40:08

There are some issues with Jam & Boost.Build that I came across while 
experimenting with possible project semantics.

1. 
list = 1 2 3 4 5 6 7 ;
list2 = 1 ;
$(list[--2]) gives 1 2 
$(list2[1--2]) gives 1
The behaviour is clearly a bug, I've fixed it and added tests for it. 

2. I don't seem to understand IMPORT/EXPORT. Suppose:

rule initialize-project ( project-module ) {
IMPORT project : project-id location used-jamfiles 
: $(project-module) : project-id location used-jamfiles ;
EXPORT $(project-module) : project-id location used-jamfiles ;
}

Alas, this code does not make new rules available using quilified names: what 
is done is that new *local* rules appear in $(proejct-module) and then 
"exported" flag for them is set? Would it make sense to additionally insert 
qualified name into the global namespace? Writing 

module $(project-module) {
rule project-id ......
}

allows to do what I want, though.

3. Jamfile in test directory simply doesn't work on Linux. /bin/sh complains 
about syntax errors and other similar problems happen. I've fixed most 
problems, although one remains, and one is solved using simply kludge. 
Suppose the following command is used:

echo "actions unbuilt { } unbuilt all ; EXIT error ;" > temp.jam
jam -sBOOST_BUILD_PATH=.. -sJAMFILE=temp.jam
rm temp.jam

Jam, AFAIKT, puts the text to a bat file and executed file. Unfortunately, 
status returned is that of the *last* command! 

4. test.jam in the new directory imports "classes", which is missing.

5. Module os.path does not work for two reasons. First, it's not finished -- 
I've added something to it locally and hope to add more later. Second, module 
names containing dots just won't work: "os.path" will be included as 
"os.jam" by the import rule. I tried to fix it.

6. Jam identification change. I'm not sure about proper copyright string -- 
Boost.Jam is based on FTJam, which is based on Perforce Jam -- so I left it 
out completely.

If those patches look OK, I'll commit them.

- Volodya

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