[Boost-build] action modifer can be before action name (was Re: What variables available in actions

From: Larry Evans (cppljevans_at_[hidden])
Date: 2007-08-07 22:22:27

On 08/04/2007 09:30 AM, Vladimir Prus wrote:
 > Larry Evans wrote:
 >
 >> On 08/03/2007 01:23 PM, Larry Evans wrote:
 >> [snip]
[snip]
 > Finally, I don't really remember if modifiers should be used before 
action name
 > or after -- using 'bind' after apparently works.
 >
The following output:

<------- cut here -------
cd /home/evansl/prog_dev/boost-svn/ro/boost-trunk/tools/build/v2/tools/
grep archive gcc.jam
     #~ - The archive builder.
     local archiver =
             : ar : [ feature.get-values <archiver> : $(options) ] : 
$(bin) : search-path ] ;
     flags gcc.archive .AR $(condition) : $(archiver[1]) ;
         ECHO notice: using gcc archiver :: $(condition) :: $(archiver[1]) ;
flags gcc.archive AROPTIONS <archiveflags> ;
rule archive ( targets * : sources * : properties * )
     # Always remove archive and start again. Here's rationale from
     # Originally removing the archive was done by splicing an RM
     # onto the archive action. That makes archives fail to build on NT
     # of the archive.
# The 'r' letter means to add files to the archive with replacement
# Since we remove archive, we don't care about replacement, but
# The 'c' letter means suppresses warning in case the archive
actions piecemeal archive

 >------- cut here -------

suggests piecemeal is a modifier and can occur before the action name (
which in the above output is archive) in an action definition.