depends: boost: Split target-os from toolset

Previously, we specified the target-os in the toolset (and sometimes
used the wrong command line flags), now we have a clear separation,
which is favored by ./bootstrap.sh and ./b2.

This means that all supported OSes will specify the correct target-os=
and toolset= on the command line.

Author: dongcarl

depends/packages/boost.mk

@@ -9,9 +9,9 @@ $(package)_config_opts_release=variant=release
 $(package)_config_opts_debug=variant=debug
 $(package)_config_opts=--layout=tagged --build-type=complete --user-config=user-config.jam
 $(package)_config_opts+=threading=multi link=static -sNO_BZIP2=1 -sNO_ZLIB=1
-$(package)_config_opts_linux=threadapi=pthread runtime-link=shared
-$(package)_config_opts_darwin=--toolset=clang-darwin runtime-link=shared
-$(package)_config_opts_mingw32=binary-format=pe target-os=windows threadapi=win32 runtime-link=static
+$(package)_config_opts_linux=target-os=linux threadapi=pthread runtime-link=shared
+$(package)_config_opts_darwin=target-os=darwin runtime-link=shared
+$(package)_config_opts_mingw32=target-os=windows binary-format=pe threadapi=win32 runtime-link=static
 $(package)_config_opts_x86_64_mingw32=address-model=64
 $(package)_config_opts_i686_mingw32=address-model=32
 $(package)_config_opts_i686_linux=address-model=32 architecture=x86
@@ -20,8 +20,8 @@ $(package)_config_opts_aarch64_android=address-model=64
 $(package)_config_opts_x86_64_android=address-model=64
 $(package)_config_opts_armv7a_android=address-model=32
 $(package)_toolset_$(host_os)=gcc
+$(package)_toolset_darwin=clang
 $(package)_archiver_$(host_os)=$($(package)_ar)
-$(package)_toolset_darwin=clang-darwin
 $(package)_config_libraries=filesystem,system,thread,test
 $(package)_cxxflags=-std=c++11 -fvisibility=hidden
 $(package)_cxxflags_linux=-fPIC
@@ -37,9 +37,9 @@ define $(package)_config_cmds
 endef
 
 define $(package)_build_cmds
-  ./b2 -d2 -j2 -d1 --prefix=$($(package)_staging_prefix_dir) $($(package)_config_opts) stage
+  ./b2 -d2 -j2 -d1 --prefix=$($(package)_staging_prefix_dir) $($(package)_config_opts) toolset=$($(package)_toolset_$(host_os)) stage
 endef
 
 define $(package)_stage_cmds
-  ./b2 -d0 -j4 --prefix=$($(package)_staging_prefix_dir) $($(package)_config_opts) install
+  ./b2 -d0 -j4 --prefix=$($(package)_staging_prefix_dir) $($(package)_config_opts) toolset=$($(package)_toolset_$(host_os)) install
 endef