Update for 2016.08.1

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

CHANGES

@@ -1,3 +1,28 @@
+2016.08.1, Released September 21st, 2016
+
+	Fix potential entire root filesystem removal in the external
+	toolchain handling. This would trigger if (and only if) the
+	following conditions are met:
+
+	- The user has selected a "known toolchain profile", such as a
+	  Linaro toolchain, a Sourcery CodeBench toolchain etc. People
+	  using "custom toolchain profile" are not affected.
+
+	- The user has enabled BR2_TOOLCHAIN_EXTERNAL_PREINSTALLED=y
+	  to indicate that the toolchain is already locally available
+	  (as opposed to having Buildroot download and extract the
+	  toolchain)
+
+	- The user has left BR2_TOOLCHAIN_EXTERNAL_PATH empty, because
+	  his toolchain is directly available through the PATH
+	  environment variable. When BR2_TOOLCHAIN_EXTERNAL_PATH is
+	  non-empty, Buildroot will do something silly (remove the
+	  toolchain contents), but that are limited to the toolchain
+	  itself.
+
+	When such conditions are met, Buildroot will run "rm -rf /*"
+	due to TOOLCHAIN_EXTERNAL_INSTALL_DIR being empty.
+
 2016.08, Released Septermber 1st, 2016
 
 	Minor fixes.

Makefile

@@ -46,7 +46,7 @@ else # umask
 all:
 
 # Set and export the version string
-export BR2_VERSION := 2016.08
+export BR2_VERSION := 2016.08.1
 
 # Save running make version since it's clobbered by the make package
 RUNNING_MAKE_VERSION := $(MAKE_VERSION)

toolchain/toolchain-external/toolchain-external.mk

@@ -138,8 +138,10 @@ TOOLCHAIN_EXTERNAL_LIBS += $(call qstrip,$(BR2_TOOLCHAIN_EXTRA_EXTERNAL_LIBS))
 
 
 TOOLCHAIN_EXTERNAL_PREFIX = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PREFIX))
+TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR = $(HOST_DIR)/opt/ext-toolchain
+
 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
-TOOLCHAIN_EXTERNAL_INSTALL_DIR = $(HOST_DIR)/opt/ext-toolchain
+TOOLCHAIN_EXTERNAL_INSTALL_DIR = $(TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR)
 else
 TOOLCHAIN_EXTERNAL_INSTALL_DIR = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PATH))
 endif
@@ -454,21 +456,29 @@ TOOLCHAIN_EXTERNAL_ACTUAL_SOURCE_TARBALL ?= \
 	$(subst -i686-pc-linux-gnu.tar.bz2,.src.tar.bz2,$(subst -i686-pc-linux-gnu-i386-linux.tar.bz2,-i686-pc-linux-gnu.src.tar.bz2,$(TOOLCHAIN_EXTERNAL_SOURCE)))
 endif
 
+# In fact, we don't need to download the toolchain, since it is already
+# available on the system, so force the site and source to be empty so
+# that nothing will be downloaded/extracted.
+ifeq ($(BR2_TOOLCHAIN_EXTERNAL_PREINSTALLED),y)
+TOOLCHAIN_EXTERNAL_SITE =
+TOOLCHAIN_EXTERNAL_SOURCE =
+endif
+
 TOOLCHAIN_EXTERNAL_ADD_TOOLCHAIN_DEPENDENCY = NO
 
 TOOLCHAIN_EXTERNAL_INSTALL_STAGING = YES
 
 # Normal handling of downloaded toolchain tarball extraction.
-ifneq ($(TOOLCHAIN_EXTERNAL_SOURCE),)
+ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
 TOOLCHAIN_EXTERNAL_EXCLUDES = usr/lib/locale/*
 
 # As a regular package, the toolchain gets extracted in $(@D), but
 # since it's actually a fairly special package, we need it to be moved
-# into TOOLCHAIN_EXTERNAL_INSTALL_DIR.
+# into TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR.
 define TOOLCHAIN_EXTERNAL_MOVE
-	rm -rf $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/*
-	mkdir -p $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)
-	mv $(@D)/* $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/
+	rm -rf $(TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR)
+	mkdir -p $(TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR)
+	mv $(@D)/* $(TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR)/
 endef
 TOOLCHAIN_EXTERNAL_POST_EXTRACT_HOOKS += \
 	TOOLCHAIN_EXTERNAL_MOVE