package/binutils: handle gprofng as an optional feature

binutils 2.39 added support for gprofng, a new profiler (see
https://www.phoronix.com/news/GNU-Profiler-gprofng).

This new profiler is enabled by default, but it requires bison on the
host.

In order to handle this, this commit:

 - Adds a new option BR2_BINUTILS_GPROFNG, which allows to
   enable/disable gprofng in host-binutils

 - Unconditionnally disables gprofng for the target binutils, based on
   the idea that in a Buildroot context the analysis of profiling data
   is generally done on the host system. This can of course always be
   revisited later by adding a new option to the target binutils
   package.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/binutils/Config.in.host

@@ -34,6 +34,12 @@ config BR2_BINUTILS_VERSION
 	default "2.38"		if BR2_BINUTILS_VERSION_2_38_X
 	default "2.39"		if BR2_BINUTILS_VERSION_2_39_X
 
+config BR2_BINUTILS_GPROFNG
+	bool "gprofng support"
+	depends on BR2_BINUTILS_VERSION_2_39_X
+	help
+	  This option enables support for gprofng, a new profiler.
+
 config BR2_BINUTILS_EXTRA_CONFIG_OPTIONS
 	string "Additional binutils options"
 	default ""

package/binutils/binutils.mk

@@ -52,6 +52,7 @@ BINUTILS_CONF_OPTS = \
 	--enable-install-libiberty \
 	--enable-build-warnings=no \
 	--with-system-zlib \
+	--disable-gprofng \
 	$(BINUTILS_DISABLE_GDB_CONF_OPTS) \
 	$(BINUTILS_EXTRA_CONFIG_OPTIONS)
 
@@ -91,6 +92,13 @@ HOST_BINUTILS_CONF_OPTS = \
 	$(BINUTILS_DISABLE_GDB_CONF_OPTS) \
 	$(BINUTILS_EXTRA_CONFIG_OPTIONS)
 
+ifeq ($(BR2_BINUTILS_GPROFNG),y)
+HOST_BINUTILS_DEPENDENCIES += host-bison
+HOST_INBUTILS_CONF_OPTS += --enable-gprofng
+else
+HOST_INBUTILS_CONF_OPTS += --disable-gprofng
+endif
+
 # binutils run configure script of subdirs at make time, so ensure
 # our TARGET_CONFIGURE_ARGS are taken into consideration for those
 BINUTILS_MAKE_ENV = $(TARGET_CONFIGURE_ARGS)