Re: [Boost-build] When can we retire V1

From: Vladimir Prus (ghost_at_[hidden])
Date: 2006-01-13 06:39:36

On Friday 13 January 2006 13:19, Markus Schöpflin wrote:

> Some things which come to my mind:
>
> 1. Quite a number of test jam files contain workarounds for specific
> compilers or platforms. Most look something like this (just as an example):
>
> local rule special-requirements ( toolset variant : properties * )
> {
>      if $(UNIX) && $(OS) = OSF
>      {
>          switch $(toolset)
>          {
>              case gcc* : properties += <cflags>-mfp-rounding-mode=d ;
>              case tru64cxx* : properties += <cflags>-fprm <cflags>d ;
>          }
>      }
>
>      return $(properties) ;
> }
>
> local rule local-run ( sources + : args * : input-files * : requirements *
>
>      : name ? : default-build * : args2 * )
>
> {
>      return [ run $(sources) : $(args) : $(input-files)
>
>          : $(requirements) special-requirements
>          : $(name) : $(default-build) : $(args2) ] ;
>
> }
>
> How does the corresponding V2 code look like?

In the simplest form:

    return [ run .....
         : $(requirements) <os>OSF,<toolset>gcc>:<cflags>-mfp-rounding=mode=d 
         ....

That's provided that <os>OSF is property set on that OS, and if not that can 
be fixed.

> 2. I use customized tool sets for all of my regression runs. For V1, one
> such file looks like this:
>
> {
>      extends-toolset tru64cxx65 ;
>
>      flags tru64cxx65 CFLAGS : -version V6.5-042 -ieee ;
>      flags tru64cxx65 LINKFLAGS : -version V6.5-042 -ieee ;
> }
>
> How will these customized tool sets work under V2?

Something like:
 
   using tru64cxx65 : : <cflags>"-version V6.5-042 -ieee" ;

> 3. Some jam files use internal V1 functions when calculating the local
> requirements. For example, expressive uses "properties = [ difference
> $(properties) : <debug-symbols>on ] <debug-symbols>off ;", multi_index uses
> "properties = [ replace-properties $(properties) : <debug-symbols>off ] ;"
> How will this have to look in V2?

Can't tell right now, I'll have to look at those Jamfile in detail.

- Volodya