Hi,
No, the problem is much simpler. You have to reorganize your
CMakeLists.txt so that you search for your libraries and add them to
your link interface after the PROJECT() call and after the
DEAL_II_INVOKE_AUTOPILOT CALL(). It is simplest to put everything last:
# The default CMakeLists.txt file does the following:
FIND_PACKAGE(deal.II 9.1 QUIET [...]) # finds deal.II configuration
DEAL_II_INITIALIZE_CACHED_VARIABLES() # sets compiler and other cached
variables
PROJECT(${TARGET}) # initializes compiler toolchain
DEAL_II_INVOKE_AUTOPILOT() # defines executable target with the
name stored in
# variable "${TARGET}"
# NOW, you can search for your external libraries:
FIND_PACKAGE(Eigen3 REQUIRED)
FIND_PACKAGE(Spectra REQUIRED)
# and NOW you can add them to the target. (Simply use the variable
# ${TARGET} where you already stored the name of the project):
TARGET_LINK_LIBRARIES(${TARGET} Spectra::Spectra)
Best,
Matthias
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