# HG changeset patch
# User "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
# Date 1292188732 -3600
# Node ID bd86485d966a5d78ecbe5d58f02c6da8613e0c1b
# Parent  10d4f2bc227ba8669c654ba9191715565286563a
libc: hide no-thread for those C libraries that do not support it

Building non-threaded glibc has been unsupported for a long time, now:
  http://sourceware.org/ml/libc-alpha/2005-08/msg00091.html

As eglibc is a spin-off of glibc: ditto.

So do not offer that possibility in the menuconfig.
Thanks to Thomas Petazzoni for spotting, and helping to solve, the issue!

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff -r 10d4f2bc227b -r bd86485d966a config/libc.in
--- a/config/libc.in	Sun Dec 12 20:47:40 2010 +0100
+++ b/config/libc.in	Sun Dec 12 22:18:52 2010 +0100
@@ -40,6 +40,10 @@
     default n
     select LIBC_SUPPORT_THREADS_ANY
 
+config LIBC_SUPPORT_THREADS_NONE
+    bool
+    default n
+
 config THREADS
     string
     default "nptl"          if THREADS_NPTL
@@ -78,6 +82,7 @@
 config THREADS_NONE
     bool
     prompt "none"
+    depends on LIBC_SUPPORT_THREADS_NONE
 
 endchoice
 
diff -r 10d4f2bc227b -r bd86485d966a config/libc/newlib.in
--- a/config/libc/newlib.in	Sun Dec 12 20:47:40 2010 +0100
+++ b/config/libc/newlib.in	Sun Dec 12 22:18:52 2010 +0100
@@ -2,6 +2,7 @@
 # depends on BARE_METAL
 
 config LIBC_newlib
+    select LIBC_SUPPORT_THREADS_NONE
     help
       Newlib is a C library intended for use on embedded systems. It is a
       conglomeration of several library parts, all under free software
diff -r 10d4f2bc227b -r bd86485d966a config/libc/uClibc.in
--- a/config/libc/uClibc.in	Sun Dec 12 20:47:40 2010 +0100
+++ b/config/libc/uClibc.in	Sun Dec 12 22:18:52 2010 +0100
@@ -3,6 +3,7 @@
 
 config LIBC_uClibc
     select LIBC_SUPPORT_LINUXTHREADS
+    select LIBC_SUPPORT_THREADS_NONE
     help
       The de-facto standard for embeded linux systems.
       Highly configurable, thus as feature-rich as you need, without