For the CMake side of things you can actually check for the function during the
initial cmake checks:
INCLUDE (${CMAKE_ROOT}/Modules/CheckFunctionExists.cmake)
CHECK_FUNCTION_EXISTS(getline HAS_GETLINE)
This will perform the check and put the result into the variable "HAS_GETLINE".
The easiest (but least maintainable way) is to then do:
if (HAS_GETLINE)
ADD_DEFINITION(-DHAS_GETLINE)
endif()
Then in your source code you do:
#ifdef HAS_GETLINE
#else
#endif
When you get comfortable with that then what you _really_ do is to create a
header template file for CMake to fill in. So create a file ProjectConfig.h.in
and put this into it.
#cmakedefine HAS_GETLINE @HAS_GETLINE@
Then in your CMakeLists.txt file you would do this:
configure_file ( ProjectConfig.h.in ${PROJECT_BINARY_DIR}/ProjectConfig.h @only
immediate)
Then in your source file simply include the generated header file:
#include "ProjectConfig.h"
All of this addresses how to detect the fact that OS X does not have getline.
You are responsible for finding a substitution. Maybe this will help:
http://doubletalkin.blogspot.com/2008/08/fgetln-replacement-for-getline-in-bsd.html
___________________________________________________________
Mike Jackson www.bluequartz.net
Principal Software Engineer [email protected]
BlueQuartz Software Dayton, Ohio
On Apr 24, 2011, at 8:20 PM, AJ ONeal wrote:
> What's the preferred solution to the OS X getline problem (meaning that it
> doesn't exist in OS X's libc) when using CMake?
> ("Don't use getline" isn't an option)
>
>
> I'd like to have an explanation of the solution and see an example which
> employs it.
>
>
> This is my first time I've tried to compile my Linux code on OS X, so I don't
> know anything about how to specify the "do this with os xyz and do this with
> os abc" options.
>
> AJ ONeal
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the CMake FAQ at:
> http://www.cmake.org/Wiki/CMake_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.cmake.org/mailman/listinfo/cmake
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Please keep messages on-topic and check the CMake FAQ at:
http://www.cmake.org/Wiki/CMake_FAQ
Follow this link to subscribe/unsubscribe:
http://www.cmake.org/mailman/listinfo/cmake
