Make the library modular usable.

build.jam

@@ -0,0 +1,19 @@
+# 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/lambda2
+    : common-requirements
+        <include>include
+    ;
+
+explicit
+    [ alias boost_lambda2 ]
+    [ alias all : boost_lambda2 test ]
+    ;
+
+call-if : boost-library lambda2
+    ;

test/Jamfile

@@ -2,10 +2,14 @@
 # Distributed under the Boost Software License, Version 1.0.
 # https://www.boost.org/LICENSE_1_0.txt
 
+import-search /boost/config/checks ;
+
 import testing ;
-import ../../config/checks/config : requires ;
+import config : requires ;
 
 project : requirements
+  <source>/boost/config//boost_config
+  <source>/boost/core//boost_core
 
   <warnings>extra
 
@@ -13,7 +17,8 @@ project : requirements
 
   <toolset>msvc:<warnings-as-errors>on
   <toolset>clang:<warnings-as-errors>on
-  <toolset>gcc:<warnings-as-errors>on ;
+  <toolset>gcc:<warnings-as-errors>on
+  ;
 
 run quick.cpp ;
 run lambda2_test.cpp ;