Bump buidlroot version to 2018.02.6

bsp/buildroot/package/flex/flex.mk

@@ -4,27 +4,28 @@
 #
 ################################################################################
 
-FLEX_VERSION = 2.5.37
-FLEX_SITE = http://download.sourceforge.net/project/flex
+FLEX_VERSION = 2.6.4
+FLEX_SITE = https://github.com/westes/flex/files/981163
 FLEX_INSTALL_STAGING = YES
 FLEX_LICENSE = FLEX
 FLEX_LICENSE_FILES = COPYING
-FLEX_DEPENDENCIES = \
-	$(if $(BR2_PACKAGE_GETTEXT_IF_LOCALE),gettext) host-m4
-FLEX_CONF_ENV = ac_cv_path_M4=/usr/bin/m4
-# we don't have a host-gettext/libintl
+FLEX_DEPENDENCIES = $(TARGET_NLS_DEPENDENCIES) host-m4
 HOST_FLEX_DEPENDENCIES = host-m4
 
-define FLEX_DISABLE_PROGRAM
-	$(SED) 's/^bin_PROGRAMS.*//' $(@D)/Makefile.in
-endef
-FLEX_POST_PATCH_HOOKS += FLEX_DISABLE_PROGRAM
+# 0001-build-AC_USE_SYSTEM_EXTENSIONS-in-configure.ac.patch
+# 0002-build-make-it-possible-to-disable-the-build-of-the-f.patch
+# 0003-build-make-it-possible-to-disable-the-build-of-the-d.patch
+FLEX_AUTORECONF = YES
+FLEX_GETTEXTIZE = YES
+FLEX_CONF_ENV = ac_cv_path_M4=/usr/bin/m4 \
+	ac_cv_func_reallocarray=no
 
-# flex++ symlink is broken when flex binary is not installed
-define FLEX_REMOVE_BROKEN_SYMLINK
-	rm -f $(TARGET_DIR)/usr/bin/flex++
-endef
-FLEX_POST_INSTALL_TARGET_HOOKS += FLEX_REMOVE_BROKEN_SYMLINK
+# Don't enable programs, they are not needed on the target, and
+# require MMU support.
+# Don't enable the doc, it's not needed on the target and requires
+# special tools (help2man) to build.
+FLEX_CONF_OPTS += --disable-program --disable-doc
+HOST_FLEX_CONF_OPTS = --disable-doc
 
 $(eval $(autotools-package))
 $(eval $(host-autotools-package))