QFileSystemEngine::canonicalName: don't use malloc()'ing realpath()HEADdev

It is available in POSIX.1-2008 but is not worth it. The Linux man page
says it only works up to PATH_MAX anyway and the POSIX documentation
says it's UB if PATH_MAX isn't defined.

This cleans up the source code out of these messy #if and should be
faster, because we avoid a heap allocation (stack is always faster).

Instead, we only relegate the heap version to the case where PATH_MAX
isn't defined (i.e., GNU HURD), because in that case the realpath()
function can't be used with a stack allocation.

Pick-to: 6.7
Change-Id: Ie30a3caf09ef4176bb36fffd17cde1ed5c5dad59
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>

0 files changed, 0 insertions, 0 deletions