zephyr/cmake/git.cmake
Marc Herbert a880fb1343 cmake: explain BUILD_VERSION and KERNEL_VERSION_*
- Add examples for the latter.
- Point at each other and highlight how independent they are from each
  other.
- State their inputs and outputs in plain English.
- Fix "git describe" error message giving the wrong impression that
  everyone cares about BUILD_VERSION. Only the boot banner cares now.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>
2019-05-09 11:52:05 +02:00

33 lines
1 KiB
CMake

# SPDX-License-Identifier: Apache-2.0
#.rst:
# git.cmake
# ---------
# If the user didn't already define BUILD_VERSION then try to initialize
# it with the output of "git describe". Warn but don't error if
# everything fails and leave BUILD_VERSION undefined.
#
# See also: independent and more static ``KERNEL_VERSION_*`` in
# ``version.cmake`` and ``kernel_version.h``
# https://cmake.org/cmake/help/latest/module/FindGit.html
find_package(Git QUIET)
if(NOT BUILD_VERSION AND GIT_FOUND)
execute_process(
COMMAND ${GIT_EXECUTABLE} describe --abbrev=12
WORKING_DIRECTORY ${ZEPHYR_BASE}
OUTPUT_VARIABLE BUILD_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_STRIP_TRAILING_WHITESPACE
ERROR_VARIABLE stderr
RESULT_VARIABLE return_code
)
if(return_code)
message(STATUS "git describe failed: ${stderr};
BUILD_VERSION is left undefined")
elseif(CMAKE_VERBOSE_MAKEFILE)
message(STATUS "git describe stderr: ${stderr}")
endif()
endif()