Move inter-lib dependencies to a project variable and into the build …

…targets.

build.jam

@@ -5,23 +5,25 @@
 
 require-b2 5.2 ;
 
+constant boost_dependencies :
+    /boost/algorithm//boost_algorithm
+    /boost/assert//boost_assert
+    /boost/config//boost_config
+    /boost/core//boost_core
+    /boost/io//boost_io
+    /boost/lexical_cast//boost_lexical_cast
+    /boost/numeric_conversion//boost_numeric_conversion
+    /boost/range//boost_range
+    /boost/smart_ptr//boost_smart_ptr
+    /boost/static_assert//boost_static_assert
+    /boost/throw_exception//boost_throw_exception
+    /boost/tokenizer//boost_tokenizer
+    /boost/type_traits//boost_type_traits
+    /boost/utility//boost_utility
+    /boost/winapi//boost_winapi ;
+
 project /boost/date_time
     : common-requirements
-        <library>/boost/algorithm//boost_algorithm
-        <library>/boost/assert//boost_assert
-        <library>/boost/config//boost_config
-        <library>/boost/core//boost_core
-        <library>/boost/io//boost_io
-        <library>/boost/lexical_cast//boost_lexical_cast
-        <library>/boost/numeric_conversion//boost_numeric_conversion
-        <library>/boost/range//boost_range
-        <library>/boost/smart_ptr//boost_smart_ptr
-        <library>/boost/static_assert//boost_static_assert
-        <library>/boost/throw_exception//boost_throw_exception
-        <library>/boost/tokenizer//boost_tokenizer
-        <library>/boost/type_traits//boost_type_traits
-        <library>/boost/utility//boost_utility
-        <library>/boost/winapi//boost_winapi
         <include>include
     ;
 
@@ -33,3 +35,4 @@ explicit
 call-if : boost-library date_time
     : install boost_date_time
     ;
+

build/Jamfile.v2

@@ -8,6 +8,7 @@
 
 
 project
+    : common-requirements <library>$(boost_dependencies)
     : requirements
         <define>DATE_TIME_INLINE
         <link>shared:<define>BOOST_ALL_DYN_LINK=1