build information as compile time defines

[jupe]

Yotta had this feature and was useful for test applications we have: ARMmbed/yotta#403

Propose is to collect build/module information like:

#define MBED_BUILD_INFO_HEADER    // to detect when these information is available
#define MBED_BUILD_TIME "YYYY-MM-DD HH:MM:SS"
#define MBED_BUILD_VCS_ID    <project_tag+sha>
#define MBED_BUILD_VCS_CLEAN   //only if git workarea is clean
#define MBED_BUILD_UUID     <unique build id>
#define MBED_BUILD_VCS_ID_<MODULE>  <module_tag+sha>
#define MBED_TOOLCHAIN  <used toolchain>
#define MBED_TARGET     <used target>
#define MBED_OS_VERSION <git tag/sha>

[screamerbg]

CC @bogdanm

[screamerbg]

I like the idea. We already have something similar in the mbed build tools. Can you file this https://github.com/ARMmbed/mbed-os?

[jupe]

Also toolchain and target would be needed.

[screamerbg]

This is already being added to mbed OS 4.0 tools - ARMmbed/mbed-os#1957. Closing here

[jupe]

I didn't found any documentation, example header file, tests either examples, so I would like to keep this open until I know that which part of my requirements is filled and which not and how can I use this new feature.

[screamerbg]

Can you file this against https://github.com/mbedmicro/mbed then?