qmake: Escape trailing backslash for OBJECTS_DIR for MinGW

qmake automatically appends a dir_sep to a few directory paths (see
MakefileGenerator::initOutPaths), and various .pri and .prf files rely on
that. Anyhow, for non-MSys MinGW on Windows this creates a problem,
because mingw32-make will interpret the backslash in

  OBJECTS_DIR = some_path\

to escape the following newline. We have been working around this
problem in various ways:

- winmakefile.cpp just removes the trailing \ for OBJECTS_DIR, at the
  cost of not being compatible with logic in .prf/.pri files that rely on
  the separator.
- winmakefile.cpp adds a '#avoid trailing-slash linebreak' comment for
  DESTDIR.  Anyhow, this does not seem to work for mingw32-make: If you
  reference $(DESTDIR), the variable will contain trailing spaces.
- unixmakefile2.cpp duplicates a trailing \ for DESTDIR.

The last approach is now taken also for OBJECTS_DIR.

Task-number: QTBUG-75257
Change-Id: Ie8171a990a9ce1cfbf1b94037252ef2392313338
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

0 files changed, 0 insertions, 0 deletions