Delegate c-ares linking magic on libtool and auto-makefiles when using

the uninstalled c-ares libtool archive built from the CVS embedded tree.

configure.ac

@@ -2200,6 +2200,7 @@ fi
 dnl set variable for use in automakefile(s)
 AM_CONDITIONAL(USE_MANUAL, test x"$USE_MANUAL" = x1)
 
+aresembedded="unknown"
 AC_MSG_CHECKING([whether to enable c-ares])
 AC_ARG_ENABLE(ares,
 AC_HELP_STRING([--enable-ares=PATH],[Enable c-ares for name lookups])
@@ -2220,8 +2221,6 @@ AC_HELP_STRING([--disable-ares],[Disable c-ares for name lookups]),
        AC_SUBST(HAVE_ARES)
        curl_ares_msg="enabled"
 
-       LIBS="-lcares $LIBS"
-
        dnl For backwards compatibility default to includes/lib in srcdir/ares
        dnl If a value is specified it is assumed that the libs are in $val/lib
        dnl and the includes are in $val/include. This is the default setup for
@@ -2232,16 +2231,15 @@ AC_HELP_STRING([--disable-ares],[Disable c-ares for name lookups]),
             AC_CONFIG_SUBDIRS(ares)
             aresinc=`cd $srcdir/ares && pwd`
             CPPFLAGS="$CPPFLAGS -I$aresinc"
-
-            dnl the pwd= below cannot 'cd' into the ares dir to get the full
-            dnl path to it, since it may not exist yet if we build outside of
-            dnl the source tree
-            pwd=`pwd`
-            LDFLAGS="$LDFLAGS -L$pwd/ares"
+            dnl This c-ares library is an uninstalled libtool archive, so
+            dnl we delegate all the linking magic on libtool and automake.
+         else
+           LIBS="-lcares $LIBS"
          fi
        else
          CPPFLAGS="$CPPFLAGS -I$enableval/include"
          LDFLAGS="$LDFLAGS -L$enableval/lib"
+         LIBS="-lcares $LIBS"
        fi
 
        if test -z "$aresembedded"; then
@@ -2275,6 +2273,9 @@ AC_HELP_STRING([--disable-ares],[Disable c-ares for name lookups]),
        AC_MSG_RESULT(no)
 )
 
+dnl set variable for use in automakefile(s)
+AM_CONDITIONAL(USE_EMBEDDED_ARES, test x$aresembedded = xyes)
+
 dnl ************************************************************
 dnl disable verbose text strings
 dnl