package/binutils: remove BR2_BINUTILS_ENABLE_LTO

Currently, this option doesn't do anything. It only adds
--enable-plugins --enable-lto to the configure flags, but doesn't
disable them if it is not set. Since both of these default to enabled,
plugins and lto are effectively always enabled.

There really is no need to make this configurable: it adds a bit of size
and build time to host-binutils, but we don't care about that for host
tools. It's still up to individual builds to enable the LTO options.

Therefore, remove the option entirely. For clarity, explicitly pass
--enable-plugins --enable-lto to configure.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/binutils/Config.in.host

@@ -35,9 +35,6 @@ config BR2_BINUTILS_VERSION
 	default "2.37"		if BR2_BINUTILS_VERSION_2_37_X
 	default "2.38"		if BR2_BINUTILS_VERSION_2_38_X
 
-config BR2_BINUTILS_ENABLE_LTO
-	bool
-
 config BR2_BINUTILS_EXTRA_CONFIG_OPTIONS
 	string "Additional binutils options"
 	default ""

package/binutils/binutils.mk

@@ -86,6 +86,8 @@ HOST_BINUTILS_CONF_OPTS = \
 	--with-sysroot=$(STAGING_DIR) \
 	--enable-poison-system-directories \
 	--without-debuginfod \
+	--enable-plugins \
+	--enable-lto \
 	$(BINUTILS_DISABLE_GDB_CONF_OPTS) \
 	$(BINUTILS_EXTRA_CONFIG_OPTIONS)
 
@@ -120,10 +122,6 @@ HOST_BINUTILS_POST_EXTRACT_HOOKS += BINUTILS_XTENSA_OVERLAY_EXTRACT
 HOST_BINUTILS_EXTRA_DOWNLOADS += $(ARCH_XTENSA_OVERLAY_URL)
 endif
 
-ifeq ($(BR2_BINUTILS_ENABLE_LTO),y)
-HOST_BINUTILS_CONF_OPTS += --enable-plugins --enable-lto
-endif
-
 # Hardlinks between binaries in different directories cause a problem
 # with rpath fixup, so we de-hardlink those binaries, and replace them
 # with copies instead.