cmake CXSparse examples

PeterFWS/Structure-PLP-SLAM src/PLPSLAM/CMakeLists.txt :28 

find_package(CXSparse)

DrTimothyAldenDavis/SuiteSparse Example/CMakeLists.txt :98 

find_package ( CXSparse 4.4.2 REQUIRED )

jlblancoc/suitesparse-metis-for-windows SuiteSparse/Example/CMakeLists.txt :97 

find_package ( CXSparse 4.3.1 REQUIRED )

ucla-vision/xivo thirdparty/ceres-solver/CMakeLists.txt :319 

find_package(CXSparse)

plumonito/dtslam 3rdparty/ceres-solver-1.9.0/CMakeLists.txt :315 

FIND_PACKAGE(CXSparse)