How to write Jam Variables/Flags to (XML)File?

I'm sort of a newbie to Jam and I'm trying to write a rule
that generates  
a Jamfile into an XML file. This all in order to let this
XML be  
transformed to e.g. MS Visual Studio Project file.

I'm experiencing problems when trying this:

e.g.actions PrintCFLAGSToFile
{
    printf "$(2)" "$(CFLAGS)"
>> $(<)
}

results in jam parsing args to printf like:
    printf "%s"  "-Zi"
"-DMSDOS" "-D_WINDOWS"
"-D_TM_WIN" "-D_TMDEF_UINT"  
"-D_huge=" "-D_X86_"
"-DWIN32" "-EHsc" "-GR"
"-W3" "-Gy" "-Fd"
"-LD" "-MD"  
"-wd" "4996"  >> test.xml

And this is not really working.

Is there any action that writes JAM variables/flags
literally to disk?

Notes: It should work on WinXP. Above action is using printf
from Cygwin.

Why?
Our current build system, which is based on
Imake/make/nmake, has some  
scripts to generate MS Visual Studio 6 project files. I want
to be sure  
that, if I propose Jam as the new build tool to use, it is
also possible  
to have this functionality of generating MS Visual Studio
project files  
 from the build system.

Hopefully somebody can offer me some help.

Thanks,

Henry
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Henry Roeland wrote:
> I'm sort of a newbie to Jam and I'm trying to write a
rule that generates  
> a Jamfile into an XML file. This all in order to let
this XML be  
> transformed to e.g. MS Visual Studio Project file.
> 
> I'm experiencing problems when trying this:
> 
> e.g.actions PrintCFLAGSToFile
> {
>     printf "$(2)" "$(CFLAGS)"
>> $(<)
> }
> 
> results in jam parsing args to printf like:
>     printf "%s"  "-Zi"
"-DMSDOS" "-D_WINDOWS"
"-D_TM_WIN" "-D_TMDEF_UINT"  
> "-D_huge=" "-D_X86_"
"-DWIN32" "-EHsc" "-GR"
"-W3" "-Gy" "-Fd"
"-LD" "-MD"  
> "-wd" "4996"  >> test.xml
> 
> And this is not really working.
> 
> Is there any action that writes JAM variables/flags
literally to disk?
> 
> Notes: It should work on WinXP. Above action is using
printf from Cygwin.
> 
> Why?
> Our current build system, which is based on
Imake/make/nmake, has some  
> scripts to generate MS Visual Studio 6 project files. I
want to be sure  
> that, if I propose Jam as the new build tool to use, it
is also possible  
> to have this functionality of generating MS Visual
Studio project files  
>  from the build system.

That is a rational that's come up many times 

> Hopefully somebody can offer me some help.

Assuming Boost.Build.v2 you can:

=====Jamfile=====
import print ;

print.output <e>test.xml ;
print.text line1 line2 line3 : overwrite ;
=================

And invoke with: bjam test.xml

The funny "<e>" is to match the internal
name of the target when given 
"test.xml" on the command line. In reality you
would need to do a bit 
more work to make it integrate more with BBv2.

Anyway you can look at
"tools/build/v2/util/print.jam" for how the
above 
works. You should see that it invokes the single text-action
which uses 
the () response file bjam functionality.


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