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

[Steve Lorimer]

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
>
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