# gh-1305: resolve libm to a PATH, not the bare name `m`. A bare `m` in
# `target_link_libraries` is looked up as a CMake TARGET first, so a module
# named `m` (`jm module m`) shadows the system math library: the object's
# test/bench link the module's DSO and fail with `undefined reference to sqrt`,
# and the module's own pair fail configure outright with "Target "m" of type
# MODULE_LIBRARY may not be linked into another target". A `find_library`
# result is an absolute path that no target name can shadow. Empty where libm
# lives in libc (MSVC, and platforms that fold it into libSystem), which links
# nothing.
find_library(JM_MATH_LIBRARY m)
if(NOT JM_MATH_LIBRARY)
  set(JM_MATH_LIBRARY "")
endif()

add_library(detection_core OBJECT detection_core.c marcum_q.c det_threshold.c det_pd.c det_dwell.c det_snr.c det_threshold_noncoherent.c det_q_inv.c det_dwell_gauss.c det_threshold_gauss.c det_ema_alpha.c det_verify_count.c det_verify_delay.c det_threshold_f.c det_pd_noncoherent.c det_n_noncoh.c det_threshold_power.c det_pd_power.c det_dwell_power.c det_snr_power.c)
target_include_directories(detection_core PUBLIC ${CMAKE_SOURCE_DIR}/native/inc)

if(BUILD_PYTHON)
# detection Python module — aggregates: LockDet, SyncFinder
Python3_add_library(detection MODULE WITH_SOABI detection_ext.c)
target_link_libraries(detection PRIVATE
    detection_core
    lockdet_core
    syncword_core
    Python3::NumPy)
target_include_directories(detection PRIVATE ${CMAKE_SOURCE_DIR}/native/inc)
set_target_properties(detection PROPERTIES
    LIBRARY_OUTPUT_DIRECTORY "${PYTHON_PACKAGE_DIR}/detection"
    RUNTIME_OUTPUT_DIRECTORY "${PYTHON_PACKAGE_DIR}/detection")
add_custom_command(TARGET detection POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
        "$<TARGET_FILE:detection>"
        "${PYTHON_PACKAGE_DIR}/detection/$<TARGET_FILE_NAME:detection>"
    VERBATIM
    COMMENT "Copy detection extension module")
endif()
