ec_commands: Make importing ec_commands.h easier for foreign projects

There are many projects (e.g., kernel, coreboot, flashrom, mosys) having
their own copy of the ec_commands.h header file. To reduce the effort of
synchronization, this file should be maintained so that it can be copied
and included without modification whenever possible.

Currently ec_commands.h includes compile_time_macros.h only if
__KERNEL__ is not defined. However, there are many macros defined in the
latter file (e.g., ARRAY_SIZE) that are already defined in other projects,
leading to a redefinition error. To resolve this issue, ec_commands.h is
modified in this CL so that compile_time_macros.h is only included when
inside the Chromium EC repository, which is controlled by the macro
CHROMIUM_EC.

Option '-DCHROMIUM_EC' is also added to CPPFLAGS to avoid redefinition
error of macro 'BUILD_ASSERT'.

BUG=b:109900671,b:118654976,chromium:984623
BRANCH=none
TEST=make buildall -j

Cq-Depend:chromium:1760656
Change-Id: I38c77f0233ff5962b6f90f25ba96802d05e706d7
Signed-off-by: Yu-Ping Wu <yupingso@chromium.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1535086
Tested-by: Yu-Ping Wu <yupingso@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>

0 files changed, 0 insertions, 0 deletions