string(REGEX MATCH "Location: ([^\n\r]+)" _MATHDX_LOC_MATCH "${_PIP_SHOW_MATHDX}")
if(NOT _MATHDX_LOC_MATCH)
message(FATAL_ERROR "Could not parse installation location for 'nvidia-mathdx'. Output was:\n${_PIP_SHOW_MATHDX}")
if(NOT EXISTS "${MATHDX_INCLUDE_DIR}")
message(FATAL_ERROR "MATHDX include directory not found at ${MATHDX_INCLUDE_DIR}. Set MATHDX_INCLUDE_DIR or ensure 'nvidia-mathdx' is installed for ${Python_EXECUTABLE}.")
message(FATAL_ERROR "MATHDX include directory not found at ${MATHDX_INCLUDE_DIR}. Set MATHDX_INCLUDE_DIR or ensure 'nvidia-mathdx' is installed for ${Python_EXECUTABLE}.")