Commit 555ffc3f authored by Chong Yidong's avatar Chong Yidong
Browse files

(HAVE_RES_INIT): Define if res_init() exists.

(HAVE_LIBRESOLV): Also define if we are using res_init().
parent c136b828
......@@ -2731,7 +2731,7 @@ AC_CHECK_HEADERS(maillock.h)
AC_CHECK_FUNCS(gethostname getdomainname dup2 \
rename closedir mkdir rmdir sysinfo getrusage get_current_dir_name \
random lrand48 bcopy bcmp logb frexp fmod rint cbrt ftime res_init setsid \
random lrand48 bcopy bcmp logb frexp fmod rint cbrt ftime setsid \
strerror fpathconf select mktime euidaccess getpagesize tzset setlocale \
utimes setrlimit setpgid getcwd getwd shutdown getaddrinfo \
__fpending mblen mbrlen mbsinit strsignal setitimer ualarm index rindex \
......@@ -2775,17 +2775,38 @@ AC_CHECK_FUNCS(getpt)
# than to expect to find it in ncurses.
AC_CHECK_LIB(ncurses, tparm)
# Do we have res_init, for detecting changes in /etc/resolv.conf?
resolv=no
AC_CHECK_FUNC(res_init, have_res_init=yes, have_res_init=no)
if test "$have_res_init" = no; then
OLIBS="$LIBS"
LIBS="$LIBS -lresolv"
AC_MSG_CHECKING(for res_init with -lresolv)
AC_TRY_LINK([#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h> ],
[res_init();],
have_res_init=yes, have_res_init=no)
AC_MSG_RESULT($have_res_init)
if test "$have_res_init" = yes ; then
resolv=yes
fi
LIBS="$OLIBS"
fi
if test "$have_res_init" = yes; then
AC_DEFINE(HAVE_RES_INIT, 1, [Define to 1 if res_init is available.])
fi
# Do we need the Hesiod library to provide the support routines?
if test "$with_hesiod" = yes ; then
# Don't set $LIBS here -- see comments above.
resolv=no
AC_CHECK_FUNC(res_send, , [AC_CHECK_FUNC(__res_send, ,
[AC_CHECK_LIB(resolv, res_send, resolv=yes,
[AC_CHECK_LIB(resolv, __res_send, resolv=yes)])])])
if test "$resolv" = yes ; then
RESOLVLIB=-lresolv
AC_DEFINE(HAVE_LIBRESOLV, 1,
[Define to 1 if you have the resolv library (-lresolv).])
else
RESOLVLIB=
fi
......@@ -2795,6 +2816,12 @@ if test "$with_hesiod" = yes ; then
:, $RESOLVLIB)])
fi
# Do we need libresolv (due to res_init or Hesiod)?
if test "$resolv" = yes ; then
AC_DEFINE(HAVE_LIBRESOLV, 1,
[Define to 1 if you have the resolv library (-lresolv).])
fi
# These tell us which Kerberos-related libraries to use.
if test "${with_kerberos+set}" = set; then
AC_CHECK_LIB(com_err, com_err)
......
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