[Bug build/18632] New: Don't build readline/libreadline.a, when --with-system-readline is supplied

["dilyan.palauzov at aegee dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18632

            Bug ID: 18632
           Summary: Don't build readline/libreadline.a, when
                    --with-system-readline is supplied
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: dilyan.palauzov at aegee dot org
  Target Milestone: ---

The bundled libreadline is always built, even if the system is ./configure'd
--with-system-readline and the build libreadline.a is not used.

Proposed patch:

Fix ./configure.ac not to proceed readline/, when --with-system-readline is
provided

diff --git a/configure.ac b/configure.ac
index 159f968..adf6dfb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -253,6 +253,12 @@ if test x$with_system_zlib = xyes ; then
   noconfigdirs="$noconfigdirs zlib"
 fi

+# Don't compile the bundled readline/libreadline.a if --with-system-readline
+# is provided.
+if test x$with_system_readline = xyes ; then
+  noconfigdirs="$noconfigdirs readline"
+fi
+
 # some tools are so dependent upon X11 that if we're not building with X, 
 # it's not even worth trying to configure, much less build, that tool.

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