From 1097bea2e005cd220738b0bc76ad11c3ec75f411 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20PETIT?= <kpet@free.fr>
Date: Sun, 28 Aug 2011 20:12:26 +0200
Subject: libc/newlib: add a config option allowing to disable builtin syscalls
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Allows to choose if one wants to keep or not the syscalls that are provided with
newlib. It passes the --disable-newlib-supplied-syscalls or
--enable-newlib-supplied-syscalls to the configure script. If one chooses to
disable the builtin syscalls, he/she will have to write his/her own. This can
be usefull to port newlib to a new platform/board.

Signed-off-by: Kévin PETIT <kpet@free.fr>

diff --git a/config/libc/newlib.in.2 b/config/libc/newlib.in.2
index 914802f..fd2a68b 100644
--- a/config/libc/newlib.in.2
+++ b/config/libc/newlib.in.2
@@ -25,3 +25,13 @@ config LIBC_NEWLIB_IO_LDBL
     depends on LIBC_NEWLIB_IO_FLOAT
     help
       Enable support for IOs on long doubles.
+
+config LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS
+    bool
+    prompt "Disable the syscalls supplied with newlib"
+    help
+      Disable the syscalls that come with newlib. You
+	  will have to implement your own _sbrk, _read,
+	  _write... If you plan to port newlib to a new
+	  platform/board, say Yes.
+
diff --git a/scripts/build/libc/newlib.sh b/scripts/build/libc/newlib.sh
index 012f39c..289c4df 100644
--- a/scripts/build/libc/newlib.sh
+++ b/scripts/build/libc/newlib.sh
@@ -79,6 +79,11 @@ do_libc_start_files() {
         newlib_opts+=( "--disable-newlib-io-float" )
         newlib_opts+=( "--disable-newlib-io-long-double" )
     fi
+    if [ "${CT_LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS}" = "y" ]; then
+        newlib_opts+=( "--disable-newlib-supplied-syscalls" )
+    else
+        newlib_opts+=( "--enable-newlib-supplied-syscalls" )
+    fi
 
     # Note: newlib handles the build/host/target a little bit differently
     # than one would expect:
-- 
cgit v0.10.2-6-g49f6