Hi Decker,
On Tuesday, May 26, 2015 11:22 AM, CMake wrote:
> SET_TARGET_PROPERTIES( <target> PROPERTIES
> COMPILE_FLAGS "${ExtraFlags}"
> COMPILE_DEFINITIONS
> "SIMPLE_FLAG;DEFINED_SYMBOL=xxxx;DEFINED_STRING=\"string value\""
> )
I'm not sure if this was meant as a solution, but I doubt the above works;
these simply *add* to the compile flags, they don't allow for completely
replacing/resetting them...
Thanks,
-David
> On Tue, May 26, 2015 at 11:07 AM, Murali Paluru <[email protected]>
> wrote:
>
>
> Hi David,
>
> The project that I am working on has similar needs of having
> different flags for each target. I have placed the different targets
> in different sub- folders and set the CMAKE_*_FLAGS. This approach
> seems to work fine as you mentioned.
>
> From my understanding, a new add_subdirectory creates a new scope of
> variables.
>
> I feel that having different targets in different directories is a
> good logical separation. So if that's working for you, why not use it?
> I am not sure if there is a better way, but I hope someone will comment.
>
> Regards,
> Murali.
>
> On Mon, May 25, 2015 at 1:04 PM, David Hauck <[email protected]>
> wrote:
>
>
> Hi,
>
> I've been searching for a definitive discussion of this but
> haven't
> been successful finding it. I have a (Unix Makefile) CMakeLists.txt
> project sub-directory that defines several (3) targets (for executable
> and shared targets). I'm trying to reset/redefine the CMAKE_C??_FLAGS
> (specifically CMAKE_C_FLAGS) property on one of the targets via the
> following statement in the CMakeLists.txt file:
>
> set_property(TARGET <target_name> PROPERTY CMAKE_C_FLAGS "-Wall
> -shared") set_property(TARGET <target_name> PROPERTY
> CMAKE_C_FLAGS_DEBUG "-g") set_property(TARGET <target_name>
> PROPERTY
> CMAKE_C_FLAGS_RELEASE "-O3")
>
> However, this isn't working and the resulting target
> compilation is
> using the directory's value for these properties. Other redefinitions
> of per-target properties (e.g., INCLUDE_DIRECTORIES) do seem to take
> so I'm wondering if certain properties are per-directory only and
> aren't meaningful with the "set_property(TARGET ...)"
> construct?
>
> If I move the target to its own sub-directory and use the
> following
> CMakeLists.txt commands instead the compile flags are properly (re)set:
>
> SET (CMAKE_C_FLAGS "-Wall -shared")
> SET (CMAKE_C_FLAGS_DEBUG "-g")
> SET (CMAKE_C_FLAGS_RELEASE "-O3")
>
> Oddly the aforementioned "set_property(TARGET..."
> constructs in place of the above "SET(CMAKE..." constructs also fail
> to reset the flags in this new directory so this doesn't seem related
> to the sub- directory CMakeLists.txt file when multiple targets are defined.
>
> I must have missed something obvious related to this in the
> documentation and/or the mailing list/Google. Any ideas?
>
> Thanks,
> -David
>
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