cmake MPREAL examples

timi-liuliang/echo thirdparty/google/eigen/unsupported/test/CMakeLists.txt :54 

find_package(MPREAL)

IBAMR/IBAMR ibtk/contrib/eigen/unsupported/test/CMakeLists.txt :58 

find_package(MPREAL)

mne-tools/mne-cpp src/external/eigen-3.4.0/unsupported/test/CMakeLists.txt :58 

find_package(MPREAL)

micmacIGN/micmac MMVII/ExternalInclude/eigen-3.4.0/unsupported/test/CMakeLists.txt :58 

find_package(MPREAL)

live-clones/gmsh contrib/eigen/unsupported/test/CMakeLists.txt :58 

find_package(MPREAL)