Add support for modular build structure. (#69)

* Make the library modular usable.

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

* Add missing NO_LIB usage requirements.

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

* Update dependencies.

* Bump B2 require to 5.2

* Update copyright dates.

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

* Split b2 dependencies into public and private.

* Be explicit about the kind of public dependencies and make the winapi be conditional on windows target-os.

build.jam

@@ -0,0 +1,24 @@
+# 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 :
+    <library>/boost/assert//boost_assert
+    <library>/boost/config//boost_config
+    <library>/boost/predef//boost_predef
+    <library>/boost/type_traits//boost_type_traits
+    <target-os>windows:<library>/boost/winapi//boost_winapi ;
+
+project /boost/atomic ;
+
+explicit
+    [ alias boost_atomic : build//boost_atomic ]
+    [ alias all : boost_atomic test ]
+    ;
+
+call-if : boost-library atomic
+    : install boost_atomic
+    ;

build/Jamfile.v2

@@ -7,6 +7,8 @@
 #  (See accompanying file LICENSE_1_0.txt or copy at
 #  http://www.boost.org/LICENSE_1_0.txt)
 
+import-search /boost/config/checks ;
+
 import common ;
 import config : requires ;
 import path ;
@@ -15,12 +17,6 @@ import feature ;
 import configure ;
 import atomic-arch-config ;
 
-local here = [ modules.binding $(__name__) ] ;
-
-project.push-current [ project.current ] ;
-project.load [ path.join [ path.make $(here:D) ] ../../config/checks/architecture ] ;
-project.pop-current ;
-
 lib synchronization ;
 explicit synchronization ;
 
@@ -47,8 +43,13 @@ local cxx_requirements = [ requires
       cxx11_static_assert
     ] ;
 
-project boost/atomic
+project
+    : common-requirements
+      <include>../include
+      $(boost_dependencies)
     : requirements
+      <library>/boost/align//boost_align
+      <library>/boost/preprocessor//boost_preprocessor
       <include>../src
       <threading>multi
       <link>shared:<define>BOOST_ATOMIC_DYN_LINK=1
@@ -59,6 +60,7 @@ project boost/atomic
     : usage-requirements
       <link>shared:<define>BOOST_ATOMIC_DYN_LINK=1
       <link>static:<define>BOOST_ATOMIC_STATIC_LINK=1
+      <define>BOOST_ATOMIC_NO_LIB=1
     : source-location ../src
     ;
 
@@ -150,5 +152,3 @@ lib boost_atomic
       <conditional>@check-synchronization-lib
       $(cxx_requirements)
    ;
-
-boost-install boost_atomic ;

build/atomic-arch-config.jam

@@ -19,23 +19,23 @@ rule deduce-architecture ( properties * )
     }
     else
     {
-        if [ configure.builds /boost/architecture//x86 : $(properties) : "x86" ]
+        if [ configure.builds /boost/config/checks/architecture//x86 : $(properties) : "x86" ]
         {
             return x86 ;
         }
-        else if [ configure.builds /boost/architecture//arm : $(properties) : "arm" ]
+        else if [ configure.builds /boost/config/checks/architecture//arm : $(properties) : "arm" ]
         {
             return arm ;
         }
-        else if [ configure.builds /boost/architecture//mips1 : $(properties) : "mips1" ]
+        else if [ configure.builds /boost/config/checks/architecture//mips1 : $(properties) : "mips1" ]
         {
             return mips1 ;
         }
-        else if [ configure.builds /boost/architecture//power : $(properties) : "power" ]
+        else if [ configure.builds /boost/config/checks/architecture//power : $(properties) : "power" ]
         {
             return power ;
         }
-        else if [ configure.builds /boost/architecture//sparc : $(properties) : "sparc" ]
+        else if [ configure.builds /boost/config/checks/architecture//sparc : $(properties) : "sparc" ]
         {
             return sparc ;
         }
@@ -51,11 +51,11 @@ rule deduce-address-model ( properties * )
     }
     else
     {
-        if [ configure.builds /boost/architecture//32 : $(properties) : "32-bit" ]
+        if [ configure.builds /boost/config/checks/architecture//32 : $(properties) : "32-bit" ]
         {
             return 32 ;
         }
-        else if [ configure.builds /boost/architecture//64 : $(properties) : "64-bit" ]
+        else if [ configure.builds /boost/config/checks/architecture//64 : $(properties) : "64-bit" ]
         {
             return 64 ;
         }