package/volk: needs C++17, not boost

Since volk 2.5.1, C++17 is required, and no Boost component is used
anymore.

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
[yann.morin.1998@free.fr: split out to its own patch]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 66215faa5237e3704d55ff171537468079dda9c4)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/volk/Config.in

@@ -1,20 +1,15 @@
 comment "volk needs a toolchain w/ C++, NPTL, wchar, dynamic library"
 	depends on BR2_USE_MMU
-	depends on BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR || \
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_7 \
 		!BR2_TOOLCHAIN_HAS_THREADS_NPTL || BR2_STATIC_LIBS
 
 config BR2_PACKAGE_VOLK
 	bool "volk"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on !BR2_STATIC_LIBS
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # C++17
 	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL
 	depends on BR2_USE_MMU # use fork()
-	depends on BR2_USE_WCHAR # boost
-	depends on BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS # boost-filesystem
-	select BR2_PACKAGE_BOOST
-	select BR2_PACKAGE_BOOST_FILESYSTEM
-	select BR2_PACKAGE_BOOST_SYSTEM
 	help
 	  VOLK is the Vector-Optimized Library of Kernels. It is a
 	  library that contains kernels of hand-written SIMD code

package/volk/volk.mk

@@ -15,7 +15,7 @@ VOLK_LICENSE_FILES = COPYING COPYING-LGPL
 VOLK_SUPPORTS_IN_SOURCE_BUILD = NO
 
 # host-python-mako are needed for volk to compile
-VOLK_DEPENDENCIES = host-python3 host-python-mako boost
+VOLK_DEPENDENCIES = host-python3 host-python-mako
 
 VOLK_CONF_OPTS = \
 	-DPYTHON_EXECUTABLE=$(HOST_DIR)/bin/python3 \