[Boost-build] MkDir1 problem - tried/failed to mkdir existing directory

From: Mark Evans (evans_mark_at_[hidden])
Date: 2006-02-16 06:55:46

Yesterday, I stumbled on a problem where rule MkDir1 tried and failed  to create a directory that already existed.  This was in trying to  build a library with toolset gcc with os = CYGWIN after having built it  with other toolsets.  I don't know what I did, but not I cannot  replicate the problem this morning.  Must be change in the phase  of the moon.  Nevertheless, would it hurt to add a defensive -p  flag to mkdir in tools/common.jam so that it won't fail when it  mistakenly tries to create a directory that already exists?  I  recall someone complaining about this with Perforce jam.
  
  Regards,
  Mark
  
  
  RCS file: /cvsroot/boost/boost/tools/build/v2/tools/common.jam,v
  retrieving revision 1.45
  diff -u -r1.45 common.jam
  --- common.jam    15 Dec 2005 18:04:05 -0000    1.45
  +++ common.jam    16 Feb 2006 11:42:00 -0000
  @@ -528,7 +528,7 @@
   
   actions MkDir1
   {
  -    mkdir "$(<)"
  +    mkdir -p "$(<)"
   }
   
   actions piecemeal together existing Clean