Disable built-in make rules for binutils 2.16.1.

If make provides a built-in rule for .m files (seen on Fedora 16, reported on
the net for OS X) it breaks binutils 2.16.1. Disable built-in rules to avoid
this.

Change-Id: I2e76c52661e47edf81706ed5c8c30f5e6cab8546

1 files changed, 4 insertions, 0 deletions

diff --git a/tools/rockboxdev.sh b/tools/rockboxdev.sh
index 05b208ce51..99ac461572 100755
--- a/tools/rockboxdev.sh
+++ b/tools/rockboxdev.sh
@@ -357,6 +357,10 @@ do
     echo ""
     case $arch in
         [Ss])
+            # For binutils 2.16.1 builtin rules conflict on some systems with a
+            # default rule for Objective C. Disable the builtin make rules. See
+            # http://sourceware.org/ml/binutils/2005-12/msg00259.html
+            export MAKEFLAGS="-r $MAKEFLAGS"
             build "binutils" "sh-elf" "2.16.1" "" "--disable-werror"
             build "gcc" "sh-elf" "4.0.3" "gcc-4.0.3-rockbox-1.diff"
             ;;