netgen/rules/CMakeLists.txt

# this file is included from the parent directory (otherwise generated source files are not recognized properly by cmake)

# generate .cpp files containing the string of the .rls meshing rule files
if(EMSCRIPTEN)
  add_custom_command(OUTPUT makerls
    COMMAND g++ ${CMAKE_CURRENT_SOURCE_DIR}/rules/makerlsfile.cpp -o ${CMAKE_CURRENT_BINARY_DIR}/makerls
    )
  set(rules_command ${CMAKE_BINARY_DIR}/makerls)
else(EMSCRIPTEN)
  add_executable(makerls rules/makerlsfile.cpp)
  set(rules_command makerls)
endif()

set(rules
    hexrules
    prismrules2
    pyramidrules
    pyramidrules2
    quadrules
    tetrules
    triarules
)

file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/rules/)

foreach(rule ${rules})
    list(APPEND rules_sources ${CMAKE_CURRENT_BINARY_DIR}/rules/rule_${rule}.cpp)
    set(rule_file ${CMAKE_CURRENT_SOURCE_DIR}/rules/${rule}.rls)
    set(rule_cpp ${CMAKE_CURRENT_BINARY_DIR}/rules/rule_${rule}.cpp)

    add_custom_command(OUTPUT ${rule_cpp}
      COMMAND ${rules_command} ${rule_file} ${rule_cpp} ${rule}
      DEPENDS makerls ${rule_file}
    )
endforeach()

target_sources(nglib PRIVATE ${rules_sources})