tests: Add workaround to allow tests mock fileno on FreeBSD

fileno can be a function and a macro in FreeBSD, depending on whether
the environment in multi-threaded or single-threaded. For single
thread, macro is used. Macro is expanded into a inline code which
accesses private field of file descriptor. This is impossible to
mock in tests.

Pretending that environment is multi-threaded makes fileno function
to be called instead of a macro. Function can be mocked for tests.

BUG=b:237606255
TEST=ninja test
tests pass on two environments:
1) FreeBSD 13.1-RELEASE-p2 GENERIC amd64
2) Debian 5.17.11 x86_64 GNU/Linux

Change-Id: I3789ea9107a4cf8033cf59bb96d3c82aa58de026
TICKET: https://ticket.coreboot.org/issues/411
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/67312
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Thomas Heijligen <src@posteo.de>
Reviewed-by: Peter Marheine <pmarheine@chromium.org>

0 files changed, 0 insertions, 0 deletions