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cmake: Add include directory policy documentation

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
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Ronald Cron 2020-05-20 15:34:47 +02:00
parent 855274113a
commit b1790af648
1 changed files with 18 additions and 0 deletions
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18
CMakeLists.txt
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@ -1,3 +1,21 @@
#
# CMake build system design considerations:
#
# - Include directories:
# + Do not define include directories globally using the include_directories
# command but rather at the target level using the
# target_include_directories command. That way, it is easier to guarantee
# that targets are built using the proper list of include directories.
# + Use the PUBLIC and PRIVATE keywords to specifiy the scope of include
# directories. That way, a target linking to a library (using the
# target_link_librairies command) inherits from the library PUBLIC include
# directories and not from the PRIVATE ones.
# + Note: there is currently one remaining include_directories command in the
# CMake files. It is related to ZLIB support which is planned to be removed.
# When the support is removed, the associated include_directories command
# will be removed as well as this note.
#
cmake_minimum_required(VERSION 2.6)
if(TEST_CPP)
project("mbed TLS" C CXX)