Fix lib/ vs lib64/ issue with SUNDIALS config (#2165)

Previously, the sundials cmake configuration wasn't found on systems that use lib64/ instead of lib/

Closes #2143

Author: dweindl

CMakeLists.txt

@@ -126,7 +126,7 @@ set(VENDORED_SUNDIALS_BUILD_DIR ${VENDORED_SUNDIALS_DIR}/build)
 set(VENDORED_SUNDIALS_INSTALL_DIR ${VENDORED_SUNDIALS_BUILD_DIR})
 set(SUNDIALS_PRIVATE_INCLUDE_DIRS "${VENDORED_SUNDIALS_DIR}/src")
 find_package(SUNDIALS REQUIRED PATHS
-             "${VENDORED_SUNDIALS_INSTALL_DIR}/lib/cmake/sundials/")
+             "${VENDORED_SUNDIALS_INSTALL_DIR}/${CMAKE_INSTALL_LIBDIR}/cmake/sundials/")
 message(STATUS "Found SUNDIALS: ${SUNDIALS_DIR}")
 
 set(GSL_LITE_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ThirdParty/gsl")

cmake/AmiciConfig.cmake

@@ -42,7 +42,7 @@ set_target_properties(SUNDIALS::KLU PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
                                                "${KLU_INCLUDE_DIR}")
 
 find_package(SUNDIALS REQUIRED PATHS
-             "@CMAKE_SOURCE_DIR@/ThirdParty/sundials/build/lib/cmake/sundials/")
+             "@CMAKE_SOURCE_DIR@/ThirdParty/sundials/build/@CMAKE_INSTALL_LIBDIR@/cmake/sundials/")
 
 if(@Boost_CHRONO_FOUND@)
   find_package(Boost COMPONENTS chrono REQUIRED)