Re: [CMake] compiler defines for sub projects

Olaf Peter Sat, 06 Apr 2013 09:51:09 -0700

thank you, this is a simply solution,

Olaf

You can make a variable contain the defines you want and the use that variable 
in the set_target_properties command.  The value of the variable will be 
inherited by all of the sup directories.

option(FOO_OPTION "enable foo" OFF)
option(BAR_OPTION "enable bar" OFF)

if(FOO_OPTION)
        set(CUSTOM_DEFINE "FOO_X")
elseif(BAR_OPTION)
        set(CUSTOM_DEFINE "FOO_Y")
else
        set(CUSTOM_DEFINE "OTHER")
endif()

set_target_properties(my_lib PROPERTIES COMPILE_DEFINITIONS ${CUSTOM_DEFINE} )

On Apr 6, 2013, at 1:21 AM, Olaf Peter <[email protected]> wrote:


thanks for your answer.

I've forgot to mention in the hurry yesterday, that inisde the lib
project generator exist which must not compiled with these defines.

if(FOO_OPTION OR BAR_OPTION)

   add_executable(generator_target ...)
   set_target_properties(generator_target ... COMPILE_DEFINITIONS ...)
endif()

This is the reason for set_target_properties(my_lib ...)

So this solution with add_definitions won't work. Possible it could work
if I removed those defs from target.

Thanks,
Olaf

If you want to have all of the sub directories to have the defines

present, you could use ADD_DEFINITIONS().


option(FOO_OPTION "enable foo" OFF)
option(BAR_OPTION "enable bar" OFF)

if(FOO_OPTION)
      add_definitions("-DFOO_X" )
elseif(BAR_OPTION)
      add_definitions("-DFOO_Y")
else()
      add_definitions("-DOTHER")
endif()

-----Original Message-----
From: [email protected] [mailto:[email protected]] On

Behalf Of Olaf Peter

Sent: Friday, April 05, 2013 12:58 PM
To: [email protected]
Subject: [CMake] compiler defines for sub projects

Hello,

is it possible to inherit compiler defines for sub projects in sub

directories?


I have a library project which can be configured at compile time

using preprocessor defines (cmake option)


option(FOO_OPTION "enable foo" OFF)
option(BAR_OPTION "enable bar" OFF)


if(FOO_OPTION)
      set_target_properties(my_lib PROPERTIES COMPILE_DEFINITIONS

"FOO_X" )

elseif(BAR_OPTION)
      set_target_properties(my_lib PROPERTIES COMPILE_DEFINITIONS

"FOO_Y")

else()
      set_target_properties(my_lib PROPERTIES COMPILE_DEFINITIONS

"OTHER" )

endif()

now, in the sub of this I have unit tests which need to know about

this compile defs, hence I have the same if/else again.


Is there an easy way for this?

Thanks,
Olaf
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Re: [CMake] compiler defines for sub projects

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