camera_calibration_parsers fails to build on OS X --> unnecessary flags?

[helenol]

I think these lines are no longer necessary:
https://github.com/ros-perception/image_common/blob/hydro-devel/camera_calibration_parsers/CMakeLists.txt#L18-L22

as the brew install yaml-cpp-0.3 command links the libraries properly (as does brew install yaml-cpp which is the 0.5 version, for that matter). (Yosemite, indigo).

Without those lines, it works even with yaml-cpp 0.5 verison which is now standard.

This is the issue referenced here: http://wiki.ros.org/jade/Installation/OSX/Homebrew/Source#os.2BAC8-OSX.2BAC8-Homebrew.2BAC8-troubleshooting.camera_calibration_parsers_build_problems
and is one of the reasons we've had to keep yaml 0.3 around even though 0.5 is the new standard.

I'll make a pull request into hydro-devel if this seems reasonable?

[vrabaud]

Well, please figure that out with @njzhangyifei a303896
I know you guys are on a rolling release so I'll accept your PR.

[njzhangyifei]

I agree with removing those lines as they look unnecessary now.

These lines were added because there isn't a FindYamlCpp.cmake back then (see issue ros/cmake_modules#30). If you look at #31, you will find that PR adds a FindYamlCpp.cmake that will work with Mac OS. With that, the same cmake logic should work for both Linux and Mac.