From b15abed686f2be25dd5b3e77f3ce160871de9e18 Mon Sep 17 00:00:00 2001
From: Rene Rivera <grafikrobot@gmail.com>
Date: Sun, 28 Apr 2024 10:30:21 -0500
Subject: [PATCH] Add support for root-less modular build/install.

---
 boost-install-dirs.jam | 32 ++++++++++++++++++++++++++++++--
 boost-install.jam      |  7 +++++--
 2 files changed, 35 insertions(+), 4 deletions(-)

diff --git a/boost-install-dirs.jam b/boost-install-dirs.jam
index 5c9f3d4..af17424 100644
--- a/boost-install-dirs.jam
+++ b/boost-install-dirs.jam
@@ -3,7 +3,6 @@
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
 import modules ;
-import boostcpp ;
 import package ;
 import path ;
 
@@ -82,7 +81,14 @@ rule header-subdir
 
 rule stagedir
 {
-    return [ path.make [ modules.peek boostcpp : BOOST_STAGE_LOCATE ] ] ;
+    if [ modules.peek boostcpp : BOOST_STAGE_LOCATE ]
+    {
+        return [ path.make [ modules.peek boostcpp : BOOST_STAGE_LOCATE ] ] ;
+    }
+    else
+    {
+        return [ path.make [ path.join [ path.pwd ] stage ] ] ;
+    }
 }
 
 # stage-libdir
@@ -102,3 +108,25 @@ rule stage-libdir
         return $(stagedir)/lib ;
     }
 }
+
+# stage-includedir
+
+rule stage-includedir
+{
+    local ld = [ MATCH --stage-includedir=(.*) : [ modules.peek : ARGV ] ] ;
+
+    if $(ld)
+    {
+        ld = [ path.root [ path.make $(ld) ] [ path.pwd ] ] ;
+        return $(ld) ;
+    }
+    else if [ modules.peek boostcpp : BOOST_ROOT ]
+    {
+        return [ path.make [ modules.peek boostcpp : BOOST_ROOT ] ] ;
+    }
+    else
+    {
+        local stagedir = [ stagedir ] ;
+        return $(stagedir)/include ;
+    }
+}
diff --git a/boost-install.jam b/boost-install.jam
index 39e9d09..ca7b6c9 100644
--- a/boost-install.jam
+++ b/boost-install.jam
@@ -3,7 +3,6 @@
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
 import modules ;
-import boostcpp ;
 import property-set ;
 import "class" : new ;
 import project ;
@@ -555,6 +554,8 @@ actions generate-cmake-variant-
 
 local rule tag ( name : type ? : property-set )
 {
+    import boostcpp ;
+
     .debug tag $(name) ;
 
     local link = [ $(property-set).get <link> ] ;
@@ -1161,7 +1162,7 @@ rule install-cmake-config ( name * )
 
 rule stage-cmake-config ( name * )
 {
-    local includedir = [ path.make [ modules.peek boostcpp : BOOST_ROOT ] ] ;
+    local includedir = [ boost-install-dirs.stage-includedir ] ;
     local libdir = [ boost-install-dirs.stage-libdir ] ;
     local cmakedir = $(libdir)/cmake ;
 
@@ -1257,6 +1258,8 @@ rule generate-dependencies ( project name ? : property-set : sources * )
 
 local rule install-stage-subdir ( properties * )
 {
+    import boostcpp ;
+
     local ps = [ property-set.create $(properties) ] ;
 
     local r = [ boostcpp.tag boost : STATIC_LIB : $(ps) ] ;