run dep commands in build dir

the file names are given relative to the build directory, so the command
needs to be run in it as well. this is a more expected (and simpler) fix
than the alternative, which would be giving file names relative to the
source directory.

reasons not to fix:
- due to some other bug, the problem really affects only builds where
  the build dir is not at the same level as the source dir - otherwise,
  absolute paths would be passed anyway
- it has some breakage potential for the cases where the commands
  actually expect being run in the source dir
- it can be worked around by manually injecting the cd statement into
  the command

reasons why i still fixed it:
- it doesn't affect in-source builds, and it seems that most complex
  build systems (which would define custom compilers with
  depend_command) don't support shadow builds anyway
- people who needed things to work probably already used $$OUT_PWD somehow
  (either a "cd" at the start, or prepending it to each path), so this
  change will be practically a no-op
- "it's just dependencies, and these are known to be broken in qmake
  anyway"

Reviewed-by: joerg
Task-number: QTBUG-1918

0 files changed, 0 insertions, 0 deletions