include_directories¶
Add include directories to the build.
include_directories([AFTER|BEFORE] [SYSTEM] dir1 [dir2 ...])
Add the given directories to those the compiler uses to search for include files. Relative paths are interpreted as relative to the current source directory.
The include directories are added to the INCLUDE_DIRECTORIES
directory property for the current CMakeLists file. They are also
added to the INCLUDE_DIRECTORIES target property for each
target in the current CMakeLists file. The target property values
are the ones used by the generators.
By default the directories specified are appended onto the current list of
directories. This default behavior can be changed by setting
CMAKE_INCLUDE_DIRECTORIES_BEFORE to ON. By using
AFTER or BEFORE explicitly, you can select between appending and
prepending, independent of the default.
If the SYSTEM option is given, the compiler will be told the
directories are meant as system include directories on some platforms.
Signalling this setting might achieve effects such as the compiler
skipping warnings, or these fixed-install system files not being
considered in dependency calculations - see compiler docs.
Arguments to include_directories may use generator expressions
with the syntax $<...>. See the cmake-generator-expressions(7)
manual for available expressions. See the cmake-buildsystem(7) manual
for more on defining buildsystem properties.
Note
Prefer the target_include_directories() command to add include
directories to individual targets and optionally propagate/export them
to dependents.