[CMake] How to configure CMake to add current path to include directive.

[Craig Scott]

Something like the following was what I had in mind (untested):

get_target_property(incDirs someTarget INCLUDE_DIRECTORIES)
list(APPEND incDirs .)
set_target_properties(someTarget PROPERTIES INCLUDE_DIRECTORIES
"${incDirs}")


On Mon, Oct 17, 2016 at 10:31 AM, Steve Lorimer <steve.lorimer at gmail.com>
wrote:

> Thanks Craig
>
> Not sure if I'm doing it right, but I couldn't get that to work.
>
> Would you be able to give me an example please?
>
> Thanks
> Steve
>
>
>
> On 16 October 2016 at 17:51, Craig Scott <craig.scott at crascit.com> wrote:
>
>> I think if you manipulate the target property INCLUDE_DIRECTORIES
>> <https://cmake.org/cmake/help/latest/prop_tgt/INCLUDE_DIRECTORIES.html>
>> directly, you should be able to force a "." in there without having it
>> substituted for an absolute path. By this I mean use set_property() or
>> set_target_properties() rather than target_include_directories() or
>> include_directories(). Note, however, that the documentation for the
>> INCLUDE_DIRECTORIES property explicitly recommends against adding relative
>> paths to the property like this (but in your case it sounds like you really
>> want a relative path, so maybe this is a valid exception to that advice).
>>
>>
>>
>> On Mon, Oct 17, 2016 at 9:46 AM, Steve Lorimer <steve.lorimer at gmail.com>
>> wrote:
>>
>>> In makefile parlance, I'm trying to add -I. (ie: the current directory)
>>> to my include paths
>>>
>>> I tried the following:
>>>
>>> include_directories(".")
>>>
>>>
>>> This doesn't work unfortunately, as relative paths are interpreted as
>>> relative to the current source directory
>>> <https://cmake.org/cmake/help/v3.0/command/include_directories.html>
>>>
>>> That is, if this statement is in my top level CMakeLists.txt, located in
>>> ~/src/project, the include directive added will be "-I ~/src/project/.",
>>> whereas I'm trying to add "-I ."
>>>
>>> The reason for my wanting this is that we have sources for a single
>>> library in several subdirs.
>>>
>>> include_directories(${CMAKE_CURRENT_SOURCE_DIR})
>>>
>>> add_library(
>>> foo
>>> STATIC
>>> foo.cpp
>>> bar/bar.cpp
>>> )
>>>
>>> In bar/bar.cpp, I have a relative include
>>>
>>> #include "../foo.h"
>>>
>>> With the above setup, this will fail to compile as only
>>> ~/src/project/foo will be added to the include paths.
>>>
>>> I'm aware that if I explicitly added the path it would work
>>>
>>> include_directories(${CMAKE_CURRENT_SOURCE_DIR}/bar)
>>>
>>> However, if there is a way to get -I. added to my include path, that's
>>> what I'm after.
>>>
>>> TIA
>>> Steve
>>>
>>>
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>>
>>
>>
>> --
>> Craig Scott
>> Melbourne, Australia
>> https://crascit.com
>>
>
>


-- 
Craig Scott
Melbourne, Australia
https://crascit.com
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