include_guard(GLOBAL)
include(FindPkgConfig)

function(otr_pkgconfig_ ret target)
    set(${ret} 1 PARENT_SCOPE)
    foreach(i ${ARGN})
        set(k pkg-config_${i})
        pkg_check_modules(${k} QUIET ${i})
        if(${${k}_FOUND})
            target_compile_options(${target} PRIVATE "${${k}_CFLAGS}")
            target_link_options(${target} PRIVATE ${${k}_LDFLAGS})
            target_include_directories(${target} SYSTEM PRIVATE ${${k}_INCLUDE_DIRS} ${${k}_INCLUDEDIR})
            target_link_libraries(${target} ${${k}_LIBRARIES})
        else()
            set(${ret} 0 PARENT_SCOPE)
        endif()
    endforeach()
endfunction()

function(otr_pkgconfig target)
    set(ret "")
    otr_pkgconfig_(ret "${target}" ${ARGN})
    foreach(i ${ARGN})
        set(k pkg-config_${i})
        if(NOT ${${k}_FOUND})
            message(FATAL_ERROR "Can't find '${i}'. Please install development files for this package.")
        endif()
    endforeach()
endfunction()