Bump Buildroot Version to buildroot 2019_02_6

bsp/buildroot/package/assimp/Config.in

@@ -1,9 +1,5 @@
 config BR2_PACKAGE_ASSIMP
 	bool "assimp"
-	# All gcc versions affected by
-	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71124, that
-	# cause an infinite loop in gcc when building this package.
-	depends on !BR2_microblaze
 	depends on BR2_INSTALL_LIBSTDCPP
 	select BR2_PACKAGE_ZLIB
 	help
@@ -16,5 +12,4 @@ config BR2_PACKAGE_ASSIMP
 	  http://www.assimp.org
 
 comment "assimp needs a toolchain w/ C++"
-	depends on !BR2_microblaze
 	depends on !BR2_INSTALL_LIBSTDCPP

bsp/buildroot/package/assimp/assimp.mk

@@ -19,11 +19,15 @@ endif
 # workaround SuperH compiler failure when static linking (i.e -fPIC is
 # not passed) in gcc versions 5.x or older. The -Os optimization level
 # causes a "unable to find a register to spill in class
-# ‘GENERAL_REGS’" error. -O2 works fine.
+# 'GENERAL_REGS'" error. -O2 works fine.
 ifeq ($(BR2_sh):$(BR2_STATIC_LIBS):$(BR2_TOOLCHAIN_GCC_AT_LEAST_6),y:y:)
 ASSIMP_CXXFLAGS += -O2
 endif
 
+ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_85180),y)
+ASSIMP_CXXFLAGS += -O0
+endif
+
 ASSIMP_CONF_OPTS += -DASSIMP_BUILD_TESTS=OFF \
 	-DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) $(ASSIMP_CXXFLAGS)"