package/*: use BR2_ENABLE_LTO to enable LTO instead of BR2_GCC_ENABLE_LTO

The BR2_GCC_ENABLE_LTO controls whether or not LTO is available in the
(internal) toolchain - it shouldn't be used to control whether packages
are built with LTO. Use the new BR2_ENABLE_LTO option instead.

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

package/fastd/fastd.mk

@@ -46,7 +46,7 @@ else
 FASTD_CONF_OPTS += -Dsystemd=disabled
 endif
 
-ifeq ($(BR2_GCC_ENABLE_LTO),y)
+ifeq ($(BR2_ENABLE_LTO),y)
 FASTD_CONF_OPTS += -Db_lto=true
 else
 FASTD_CONF_OPTS += -Db_lto=false

package/log4cplus/log4cplus.mk

@@ -11,7 +11,7 @@ LOG4CPLUS_LICENSE = Apache-2.0, BSD-2-Clause, BSD-like (threadpool)
 LOG4CPLUS_LICENSE_FILES = LICENSE
 LOG4CPLUS_INSTALL_STAGING = YES
 
-ifeq ($(BR2_GCC_ENABLE_LTO),y)
+ifeq ($(BR2_ENABLE_LTO),y)
 LOG4CPLUS_CONF_OPTS += --enable-lto
 else
 LOG4CPLUS_CONF_OPTS += --disable-lto

package/netdata/netdata.mk

@@ -23,7 +23,7 @@ NETDATA_DEPENDENCIES = libuv util-linux zlib
 # provided by autoconf relies on wchar_t.
 NETDATA_CONF_ENV = ac_cv_prog_cc_c99=-std=gnu99
 
-ifeq ($(BR2_GCC_ENABLE_LTO),y)
+ifeq ($(BR2_ENABLE_LTO),y)
 NETDATA_CONF_OPTS += --enable-lto
 else
 NETDATA_CONF_OPTS += --disable-lto

package/rocksdb/rocksdb.mk

@@ -69,7 +69,7 @@ else
 ROCKSDB_MAKE_OPTS += ROCKSDB_DISABLE_ZSTD=1
 endif
 
-ifeq ($(BR2_GCC_ENABLE_LTO),y)
+ifeq ($(BR2_ENABLE_LTO),y)
 ROCKSDB_MAKE_OPTS += USE_LTO=1
 else
 ROCKSDB_MAKE_OPTS += USE_LTO=0

package/unbound/unbound.mk

@@ -35,7 +35,7 @@ else
 UNBOUND_CONF_OPTS += --without-pthreads
 endif
 
-ifeq ($(BR2_GCC_ENABLE_LTO),y)
+ifeq ($(BR2_ENABLE_LTO),y)
 UNBOUND_CONF_OPTS += --enable-flto
 else
 UNBOUND_CONF_OPTS += --disable-flto

package/valgrind/valgrind.mk

@@ -52,7 +52,7 @@ VALGRIND_CONF_OPTS += \
 	--host=$(patsubst arm-%,armv7-%,$(GNU_TARGET_NAME))
 endif
 
-ifeq ($(BR2_GCC_ENABLE_LTO),y)
+ifeq ($(BR2_ENABLE_LTO),y)
 VALGRIND_CONF_OPTS += --enable-lto
 else
 VALGRIND_CONF_OPTS += --disable-lto

package/wireshark/wireshark.mk

@@ -31,7 +31,7 @@ ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
 WIRESHARK_CONF_OPTS += -DCMAKE_EXE_LINKER_FLAGS=-latomic
 endif
 
-ifeq ($(BR2_GCC_ENABLE_LTO),y)
+ifeq ($(BR2_ENABLE_LTO),y)
 WIRESHARK_CONF_OPTS += -DENABLE_LTO=ON
 else
 WIRESHARK_CONF_OPTS += -DENABLE_LTO=OFF