How do I set global cmake flags catkin

asked 2015-01-25 01:16:20 -0500

aswin
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Hi all, So far I have only used catkin to do a normal build using catkin_make and a release build using catkin_make -DCMAKE_BUILD_TYPE=Release.

However, I would like to set more CMAKE_CXX_FLAGS and various other options globally for multiple packages in my workspace. How do I do this?

Do I modify the top level cmake? Are there any examples for the same?

answered 2015-01-25 01:36:34 -0500

Dirk Thomas
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catkin_make --help will show that it accepts any CMake arguments with -Dname=value.

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Thank you Dirk. Would it be possible to set these flags in /opt/ros/indigo/share/catkin/cmake/toplevel.cmake? Or override the CMakeLists.txt in your workspace?

aswin ( 2015-01-25 01:58:53 -0500 )edit

Technically yes, you can replace the symlink of the CMake file in the root of your workspace with a modified version. Or even change the system wide file. But I would recommend passing the parameter once - it is persistent and you don't have to pass it again.

Dirk Thomas ( 2015-01-25 02:42:16 -0500 )edit

I would recommend a CMake toolchain file for this. It will allow you to set settings for all packages.

William ( 2015-01-25 02:47:45 -0500 )edit

Great answers. Dirk, its good to know I only have to do this once.

William, so I do catkin_make -DCMAKE_TOOLCHAIN_FILE=~/myToolChain.cmake. In this file I can enter lines like: set(CMAKE_CXX_FLAGS "-std=c++0x ${CMAKE_CXX_FLAGS}). Is this correct?

aswin ( 2015-01-25 05:06:30 -0500 )edit

Something like that, the toolchain file is mostly for cross-compiling, but you could use it for this. I'd suggesting looking at: http://www.cmake.org/cmake/help/v3.0/...

William ( 2015-01-25 20:21:23 -0500 )edit

Thank you guys. Will add a note somewhere in the wiki when I get it running

aswin ( 2015-01-25 21:34:46 -0500 )edit

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