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

[Steve Lorimer]

Thanks Craig

Looks like it did what you intended, but cmake won't allow it

CMake Error in foo/CMakeLists.txt:
  Found relative path while evaluating include directories of "foo":

    "."


Bummer! :(



On 16 October 2016 at 18:35, Craig Scott <craig.scott at crascit.com> wrote:

> 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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