From 8a860e05d0f90d539e3e8710f6924668f1292a76 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Ferdinand=20Rivera=20Morell?=
 <grafikrobot@gmail.com>
Date: Sat, 24 Aug 2024 04:37:14 -0500
Subject: [PATCH] Add support for modular build structure. (#29)

This is part of the effort to make the Boost libraries "modular" for build and consumption. See https://lists.boost.org/Archives/boost/2024/01/255704.php and https://github.com/grafikrobot/boost-b2-modular/blob/b2-modular/README.adoc for more information.

This PR depends on the following other PRs being merged to both develop and master branches of the respective repos:

- https://github.com/boostorg/boost/pull/854

This PR will be changed to ready for review, i.e. not draft, when the above are merged. Do not merge this one until that time.
---
 build.jam       | 26 ++++++++++++++++++++++++++
 test/Jamfile.v2 |  6 ++++--
 2 files changed, 30 insertions(+), 2 deletions(-)
 create mode 100644 build.jam

diff --git a/build.jam b/build.jam
new file mode 100644
index 0000000..a266ab2
--- /dev/null
+++ b/build.jam
@@ -0,0 +1,26 @@
+# 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/config//boost_config
+    /boost/smart_ptr//boost_smart_ptr
+    /boost/throw_exception//boost_throw_exception ;
+
+project /boost/conversion
+    : common-requirements
+        <include>include
+    ;
+
+explicit
+    [ alias boost_conversion : : : : <library>$(boost_dependencies) ]
+    [ alias all : boost_conversion test ]
+    ;
+
+call-if : boost-library conversion
+    ;
+
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 9ee4d4e..3dd61b0 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -5,13 +5,15 @@
 # file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 #
 
+require-b2 5.0.1 ;
+import-search /boost/config/checks ;
+import config : requires ;
 import testing ;
 import feature ;
 
-import ../../config/checks/config : requires ;
-
 project
     : requirements
+        <library>/boost/conversion//boost_conversion
         [ requires cxx11_decltype ]
         # default to all warnings on:
         <warnings>all