This bug occurs if ./configure is called with -v on systems on
which fd proc entries point to the files/devices they are open
on instead of being magic nodes which would basically dup() the
actual fds (e.g., Linux).
In this case, the command "tee $tty" appends to /dev/stderr, which
may be already opened by the parent process. This breaks the log file.
Normally, the log file starts with
This is the Qt Open Source Edition.
...
but with `-v` flag it would start with output of awkprog and maybe
some zero bytes. Zero bytes are observed on Debian Wheezy.
DEFAULT_INCDIRS=...
...
^@^@^@^@^@^@^@^@^@^@^@^@...
Done running configuration tests.
...
To fix this problem, the output of `...` is saved to a variable, and
then eval'd and echo'd (if -v).
This solution was found by Tony Theodore.
https://github.com/mxe/mxe/issues/938#issuecomment-149770348
Change-Id: Id0c28598890e813774cc92f38ee46a0697b34e77
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
45fe3f1cde