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Use system Eigen by default only if found

release/4.3a0
Varun Agrawal 2022-07-07 11:02:54 -04:00
parent 8f509dc326
commit ea8e69c735
1 changed files with 6 additions and 3 deletions
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9
cmake/HandleEigen.cmake
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@ -1,7 +1,10 @@
###############################################################################
# Option for using system Eigen or GTSAM-bundled Eigen
option(GTSAM_USE_SYSTEM_EIGEN "Find and use system-installed Eigen. If 'off', use the one bundled with GTSAM" OFF)
# Default: Use system's Eigen if found automatically:
find_package(Eigen3 QUIET)
set(USE_SYSTEM_EIGEN_INITIAL_VALUE ${Eigen3_FOUND})
option(GTSAM_USE_SYSTEM_EIGEN "Find and use system-installed Eigen. If 'off', use the one bundled with GTSAM" ${USE_SYSTEM_EIGEN_INITIAL_VALUE})
unset(USE_SYSTEM_EIGEN_INITIAL_VALUE)
if(NOT GTSAM_USE_SYSTEM_EIGEN)
# This option only makes sense if using the embedded copy of Eigen, it is
@ -11,7 +14,7 @@ endif()
# Switch for using system Eigen or GTSAM-bundled Eigen
if(GTSAM_USE_SYSTEM_EIGEN)
find_package(Eigen3 REQUIRED)
find_package(Eigen3 REQUIRED) # need to find again as REQUIRED
# Use generic Eigen include paths e.g. <Eigen/Core>
set(GTSAM_EIGEN_INCLUDE_FOR_INSTALL "${EIGEN3_INCLUDE_DIR}")