# This file is part of Desktop App Toolkit,
# a set of libraries for developing nice desktop applications.
#
# For license and copyright information please follow this link:
# https://github.com/desktop-app/legal/blob/master/LEGAL

add_library(external_gsl INTERFACE IMPORTED GLOBAL)
add_library(desktop-app::external_gsl ALIAS external_gsl)

if (DESKTOP_APP_USE_PACKAGED)
    if (DESKTOP_APP_USE_PACKAGED_LAZY)
        find_package(Microsoft.GSL QUIET)
    else()
        find_package(Microsoft.GSL)
    endif()

    if (Microsoft.GSL_FOUND)
        target_link_libraries(external_gsl INTERFACE Microsoft.GSL::GSL)

        math(EXPR _gsl_version_num "${Microsoft.GSL_VERSION_MAJOR} * 10000 + ${Microsoft.GSL_VERSION_MINOR} * 100 + ${Microsoft.GSL_VERSION_PATCH}")
        target_compile_definitions(external_gsl INTERFACE GSL_VERSION=${_gsl_version_num})
    endif()
endif()

if (NOT Microsoft.GSL_FOUND)
    target_include_directories(external_gsl SYSTEM
    INTERFACE
        ${third_party_loc}/GSL/include
    )
endif()
