AC_SUBST(CARES_OBJ)

AC_SUBST(CARES_LIBS)

AC_SUBST(CARES_CFLAGS)

AC_CHECK_HEADERS(ares.h,

[AC_CHECK_LIB([cares], [ares_init], [ CARES_LIBS="-lcares" ], [AC_MSG_ERROR([No usable c-ares library found])])],

[AC_MSG_ERROR([c-ares header files are not installed])]

)

dnl Check if this particular version of c-ares supports the generic ares_free_data function

AC_CHECK_LIB([cares],

[ares_free_data],

[AC_DEFINE([HAVE_ARES_DATA], 1, [Does c-ares have ares_free_data()?])

],

[

ares_data=1

]

)

AM_CONDITIONAL(BUILD_ARES_DATA, test x$ares_data = x1)