Add support for modular build structure.

build.jam

@@ -0,0 +1,17 @@
+# 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 ;
+
+project /boost/leaf
+    ;
+
+explicit
+    [ alias boost_leaf : : : : <include>include ]
+    [ alias all : boost_leaf test ]
+    ;
+
+call-if : boost-library leaf
+    ;

test/Jamfile.v2

@@ -22,14 +22,15 @@ project
         <cxxstd>11
         <threading>multi
     : requirements
+        <library>/boost/config//boost_config
+        <use>/boost/exception//boost_exception
         <define>BOOST_LEAF_BOOST_AVAILABLE
         <target-os>windows:<define>_CRT_SECURE_NO_WARNINGS
         <threading>single:<define>BOOST_LEAF_NO_THREADS
         <toolset>gcc:<cxxflags>"-Wno-delete-non-virtual-dtor -Wno-parentheses"
         <toolset>clang:<cxxflags>"-Wno-unused-variable -Wno-delete-non-virtual-dtor -Wno-non-virtual-dtor -Wno-dangling-else"
         <toolset>darwin:<cxxflags>"-Wno-unused-variable -Wno-delete-non-virtual-dtor -Wno-non-virtual-dtor -Wno-delete-non-abstract-non-virtual-dtor -Wno-dangling-else"
         <toolset>msvc:<cxxflags>"-wd 4267 -wd 4996 -wd 4244"
-        <include>../../..
     ;
 
 compile _hpp_common_test.cpp ;