Add support for modular build structure. (boostorg#84)

* Make the library modular usable.

* Switch to library requirements instead of source. As source puts extra source in install targets.

* Remove not-needed reference to Conversion dependency.

* Add missing b2 testing module import.

* Add requires-b2 check to top-level build file.

* Bump B2 require to 5.2

* Change all <source> references to <library>.

* Update copyright dates.

* Move inter-lib dependencies to a project variable and into the build targets.

* Update build deps.

build.jam

@@ -0,0 +1,35 @@
+# Copyright René Ferdinand Rivera Morell 2023-2024
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+require-b2 5.2 ;
+
+constant boost_dependencies :
+    /boost/assert//boost_assert
+    /boost/concept_check//boost_concept_check
+    /boost/config//boost_config
+    /boost/core//boost_core
+    /boost/detail//boost_detail
+    /boost/function_types//boost_function_types
+    /boost/fusion//boost_fusion
+    /boost/mpl//boost_mpl
+    /boost/optional//boost_optional
+    /boost/smart_ptr//boost_smart_ptr
+    /boost/static_assert//boost_static_assert
+    /boost/type_traits//boost_type_traits
+    /boost/utility//boost_utility ;
+
+project /boost/iterator
+    : common-requirements
+        <include>include
+    ;
+
+explicit
+    [ alias boost_iterator : : : : <library>$(boost_dependencies) ]
+    [ alias all : boost_iterator test ]
+    ;
+
+call-if : boost-library iterator
+    ;
+

test/Jamfile.v2

@@ -2,6 +2,10 @@
 # Software License, Version 1.0. (See accompanying
 # file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
+import testing ;
+
+project : requirements <library>/boost/iterator//boost_iterator ;
+
 test-suite iterator
   :
     # These first two tests will run last, and are expected to fail
@@ -22,9 +26,9 @@ test-suite iterator
     [ run zip_iterator_test2_fusion_vector.cpp ]
     [ run zip_iterator_test2_fusion_list.cpp ]
 #    [ run zip_iterator_test2_fusion_deque.cpp ] // See bug report for fusion https://svn.boost.org/trac/boost/ticket/11572
-    [ run zip_iterator_test_fusion.cpp ]
-    [ run zip_iterator_test_std_tuple.cpp ]
-    [ run zip_iterator_test_std_pair.cpp ]
+    [ run zip_iterator_test_fusion.cpp : : : <library>/boost/assign//boost_assign ]
+    [ run zip_iterator_test_std_tuple.cpp : : : <library>/boost/assign//boost_assign ]
+    [ run zip_iterator_test_std_pair.cpp : : : <library>/boost/assign//boost_assign ]
 
     [ run is_iterator.cpp ]
 
@@ -61,10 +65,10 @@ test-suite iterator
     [ compile-fail minimum_category_compile_fail.cpp ]
 
     [ run next_prior_test.cpp ]
-    [ run advance_test.cpp ]
-    [ run distance_test.cpp ]
-    [ compile adl_test.cpp ]
-    [ compile range_distance_compat_test.cpp ]
+    [ run advance_test.cpp : : : <library>/boost/container//boost_container ]
+    [ run distance_test.cpp : : : <library>/boost/container//boost_container ]
+    [ compile adl_test.cpp : <library>/boost/array//boost_array ]
+    [ compile range_distance_compat_test.cpp : <library>/boost/range//boost_range ]
 
     [ run shared_iterator_test.cpp ]
 ;