Make the library modular usable.

build.jam

@@ -0,0 +1,29 @@
+# Copyright René Ferdinand Rivera Morell 2023
+# 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)
+
+import project ;
+
+project /boost/type_traits
+    : common-requirements
+        <source>/boost/config//boost_config
+        <source>/boost/static_assert//boost_static_assert
+        <include>include
+    ;
+
+explicit
+    [ alias boost_type_traits ]
+    [ alias all : boost_type_traits test ]
+    # Other Boost lib tests depend on the type_traits test checks.
+    [ alias testing
+        : # sources
+        : # requirements
+        : # default-buidl
+        : # usage-requirements
+            <include>test
+        ]
+    ;
+
+call-if : boost-library type_traits
+    ;

test/Jamfile.v2

@@ -18,6 +18,10 @@ if [ os.environ CI ]
 # regular
 
 project : requirements
+   <source>/boost/core//boost_core
+   <source>/boost/move//boost_move
+   <source>/boost/mpl//boost_mpl
+
    # default to all warnings on:
    <warnings>all
    # set warnings as errors for those compilers we know we get warning free: