Don't check for readline, if shared lib or Windows GUI is selected

configure.ac

@@ -1252,12 +1252,16 @@ if test "x$enable_expdevices" = xyes; then
 fi
 
 #  ----  Option to include GNU readline support in ngspice CLI  ----
-#  ----  Default: disabled.                                     ----
+#  ----  Default: enabled.                                     ----
 #  ----  Hope to see in the future readline replacement.        ----
 
-if test "x$with_readline" = xno ; then
+if test "x$with_wingui" = xyes || test "x$with_ngshared" = xyes; then
     AC_MSG_RESULT([GNU readline disabled.])
+    AC_MSG_RESULT([BSD editline disabled.])
 else
+    if test "x$with_readline" = xno ; then
+        AC_MSG_RESULT([GNU readline disabled.])
+    else
         if test "x$with_readline" = x || test "x$with_readline" = xyes ; then
             if test "x$with_tcl" = x  ||  test "x$with_tcl" = xno ; then
                 AC_MSG_RESULT([Checking for readline:])
@@ -1272,7 +1276,7 @@ else
                     [AC_MSG_ERROR([Couldn't find readline libraries.])])
             fi
         else
-# Especially defined for macOS (Big Sur), with readline installed from Brew
+    # Especially defined for macOS (Big Sur), with readline installed from Brew
             for dir in \
                 $with_readline
                 do
@@ -1290,14 +1294,14 @@ else
                     fi
                 done
         fi
-fi
+    fi
 
-#  ----  Option to include BSD editline support in ngspice CLI  ----
-#  ----  Default: disabled.                                     ----
+    #  ----  Option to include BSD editline support in ngspice CLI  ----
+    #  ----  Default: disabled.                                     ----
 
-if test "x$with_editline" != xyes; then
+    if test "x$with_editline" != xyes; then
         AC_MSG_RESULT([BSD editline disabled.])
-else
+    else
         AC_MSG_RESULT([Checking for editline:])
         AC_CHECK_HEADERS([editline/readline.h],
             [AC_DEFINE([HAVE_BSDEDITLINE], [1], [Define to enable BSD editline])],
@@ -1309,6 +1313,7 @@ else
             [LIBS="$LIBS -ledit"],
             [AC_MSG_ERROR([Couldn't find editline libraries.])],
             [-lncurses])
+    fi
 fi
 
 # Use AC_CHECK_HEADERS so the HAVE_*_H symbol gets defined