[Box Backup-dev] Missing libs when building on Solaris

[Stefan Norlin]

I found the snippet below in configure.ac for curl and when
adding it to box' configure.ac it worked fine on Solaris.

It is a bit more intelligent, maybe that is the way to do it?

Stefan

dnl **********************************************************************
dnl Checks for libraries.
dnl **********************************************************************

dnl gethostbyname in the nsl lib?
AC_CHECK_FUNC(gethostbyname, , [ AC_CHECK_LIB(nsl, gethostbyname) ])

if test "$ac_cv_lib_nsl_gethostbyname" != "yes" -a 
"$ac_cv_func_gethostbyname" != "yes"; then
  dnl gethostbyname in the socket lib?
  AC_CHECK_FUNC(gethostbyname, , [ AC_CHECK_LIB(socket, gethostbyname) ])
fi

dnl At least one system has been identified to require BOTH nsl and
dnl socket libs to link properly.
if test "$ac_cv_lib_nsl_gethostbyname" = "$ac_cv_func_gethostbyname"; then
  AC_MSG_CHECKING([trying both nsl and socket libs])
  my_ac_save_LIBS=$LIBS
  LIBS="-lnsl -lsocket $LIBS"
  AC_TRY_LINK( ,
             [gethostbyname();],
             my_ac_link_result=success,
             my_ac_link_result=failure )

  if test "$my_ac_link_result" = "failure"; then
    AC_MSG_RESULT([no])
    AC_MSG_ERROR([couldn't find libraries for gethostbyname()])
    dnl restore LIBS
    LIBS=$my_ac_save_LIBS
  else
    AC_MSG_RESULT([yes])
  fi
fi

dnl socket lib?
AC_CHECK_FUNC(connect, , [ AC_CHECK_LIB(socket, connect) ])