boost: Update 6

Minor fixes:
 - CoRoutine2 selector requires that a GCC v5 compiler or better is selected
   - coroutine2 requires C++14
 - The Makefile was not alowing the libraries to be compiled with both
   statically and shared, at the same time. There are now two seperate options,
   allowing to select which version is wanted.
 - The Makefile was also not allowing to compile both single thread and multi-
   thread versions. Again, two seperate options now exist.
 - There is also the option to build another set of libraries with debug support
   which is good for development.
 - These options are important for those who whish to build an OpenWRT SDK.

Signed-off-by: Carlos M. Ferreira <carlosmf.pt@gmail.com>

libs/boost/Makefile

@@ -17,7 +17,7 @@ include $(INCLUDE_DIR)/target.mk
 
 PKG_NAME:=boost
 PKG_VERSION:=1_59_0
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE:=$(PKG_NAME)_$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=@SF/boost
@@ -50,6 +50,33 @@ endef
 define Package/boost/description
 This package provides the Boost v1.59 libraries.
 Boost is a set of free, peer-reviewed, portable C++ source libraries.
+This package provides the following libraries:
+ - atomic
+ - chrono
+ - container
+ - context
+ - coroutine
+ - - coroutine2 (requires GCC v5 and up)
+ - date_time
+ - exception
+ - filesystem
+ - graph
+ - - graph-parallel
+ - iostreams
+ - locale
+ - log
+ - math
+ - program_options
+ - python
+ - python3
+ - random
+ - regex
+ - serialization
+ - signals
+ - system
+ - thread
+ - timer
+ - wave
 endef
 
 BOOST_LIBS =
@@ -89,23 +116,49 @@ define Package/boost/config
       depends on PACKAGE_boost
       	comment "Boost compilation options."
 	    config boost-static-libs
-	    	bool "Static Libraries Only"	    	
+	    	bool "Compile Static Libraries"
 	    	help 
-	    		Static compile of all selected boost libraries.
+	    		Compile static version of all selected boost libraries.
 	    	default n
+
+	    config boost-shared-libs
+	    	bool "Compile Shared Libraries"
+	    	help 
+	    		Compile shared version of all selected boost libraries.
+	    	default y
 	    
 	    config boost-runtime-static
-	    	bool "Use static version of C and C++ runtimes."	    	
+	    	bool "Use static version of C and C++ runtimes for static libraries."	    	
 	    	help 
-	    		Determines if shared or static version of C and C++ runtimes should be used.
+	    		Determines if shared or static version of C and C++ runtimes should be used for static libraries.
 	    	default n
 	    	select boost-static-libs
 
+	    config boost-runtime-shared
+	    	bool "Use shared version of C and C++ runtimes for shared libraries."
+	    	help 
+	    		Determines if shared or static version of C and C++ runtimes should be used for shared libraries.
+	    	default n
+	    	select boost-shared-libs
+
+
 	    config boost-multi-threading
 	    	bool "Multithread Support"	    	
 	    	help 
-	    		Compile Boost libraries with multithread support.
+	    		Compile Boost libraries n multithread mode.
 	    	default y
+
+	    config boost-single-thread
+	    	bool "Single thread Support"	    	
+	    	help 
+	    		Compile Boost libraries in single-thread mode.
+	    	default n
+	    
+	    config boost-with-debug
+	    	bool "Boost Debug Support"	    	
+	    	help 
+	    		Compile Boost libraries with debug support.
+	    	default n	    	
     endmenu
 
     menu "Select Boost libraries"
@@ -121,6 +174,7 @@ define Package/boost/config
 	    	select PACKAGE_boost-test
 	    
 		config boost-coroutine2
+		depends on @GCC_USE_VERSION_5
 		bool "Boost couroutine2 support."
 		select PACKAGE_boost-coroutine
 		default n
@@ -184,15 +238,14 @@ $(eval $(call DefineBoostLibrary,date_time,,))
 #$(eval $(call DefineBoostLibrary,exception,,))
 $(eval $(call DefineBoostLibrary,filesystem,system,))
 $(eval $(call DefineBoostLibrary,graph,regex,))
-#$(eval $(call DefineBoostLibrary,graph_parallel,,))
 $(eval $(call DefineBoostLibrary,iostreams,,+zlib))
 $(eval $(call DefineBoostLibrary,locale,system,$(ICONV_DEPENDS) +@BUILD_NLS))
 $(eval $(call DefineBoostLibrary,log,system chrono date_time thread filesystem regex,))
 $(eval $(call DefineBoostLibrary,math,,))
 #$(eval $(call DefineBoostLibrary,mpi,,)) # OpenMPI does no exist in OpenWRT at this time.
 $(eval $(call DefineBoostLibrary,program_options,,))
-$(eval $(call DefineBoostLibrary,python,,+python))
-$(eval $(call DefineBoostLibrary,python3,,+python3))
+$(eval $(call DefineBoostLibrary,python,,+CONFIG_boost_python:python))
+$(eval $(call DefineBoostLibrary,python3,,+CONFIG_boost_python3:python3))
 $(eval $(call DefineBoostLibrary,random,system,))
 $(eval $(call DefineBoostLibrary,regex,,))
 $(eval $(call DefineBoostLibrary,serialization,,))
@@ -245,11 +298,16 @@ define Build/Compile
 		bjam \
 			'-sBUILD=release <optimization>space <inlining>on <debug-symbols>off' \
 			--ignore-site-config \
-			--toolset=gcc-$(ARCH) --build-type=minimal --layout=system abi=$(BOOST_ABI) \
+			--toolset=gcc-$(ARCH) abi=$(BOOST_ABI) \
 			--disable-long-double \
-			$(if $(CONFIG_boost-static-libs),link=static,link=shared) \
+			--layout=tagged \
+			$(if $(CONFIG_boost-with-debug),--build-type=complete,--build-type=minimal) \
+			$(if $(CONFIG_boost-static-libs),link=static,) \
 			$(if $(CONFIG_boost-runtime-static),runtime-link=static,runtime-link=shared) \
-			$(if $(CONFIG_boost-multi-threading),threading=multi,threading=single) \
+			$(if $(CONFIG_boost-shared-libs),link=shared,) \
+			$(if $(CONFIG_boost-runtime-shared),runtime-link=shared,) \
+			$(if $(CONFIG_boost-single-thread),threading=single,) \
+			$(if $(CONFIG_boost-multi-threading),threading=multi,) \
 			$(CONFIGURE_ARGS) \
 			--without-mpi \
 			$(if $(CONFIG_boost-coroutine2),,--without-coroutine2) \