AC_SUBST(CARES_LIBS)
AC_SUBST(CARES_CFLAGS)
PKG_CHECK_MODULES([CARES], [libcares], [found_libcares=yes], [found_libcares=no])
SSS_AC_EXPAND_LIB_DIR()
AS_IF([test x"$found_libcares" != xyes],
[AC_CHECK_HEADERS([ares.h],
[AC_CHECK_LIB([cares],
[ares_init],
[CARES_LIBS="-L$sss_extra_libdir -lcares"],
[AC_MSG_ERROR([No usable c-ares library found])],
[-L$sss_extra_libdir])],
[AC_MSG_ERROR([c-ares header files are not installed])])]
)