[Boost-build] Boost 1.35.0 Jamroot patch to make install work in subprojects

From: Jonathan Biggar (jon_at_[hidden])
Date: 2008-07-15 00:32:25

I got annoyed that running bjam --v2 install in a boost library build 
directory doesn't work, so I decided to track down the problems and fix 
them.

There were three issues:

1.  The setting for <install-source-root> needed to be rooted at 
BOOST_ROOT or the install process got very confused about where to 
install things in some cases.

2.  $(install-requirements) is calculated in Jamroot, but isn't 
available when running from a subproject.  I converted it into a project 
constant BOOST_INSTALL_REQUIREMENTS, which is available in all subprojects.

3.  I removed "<dependency>/boost//install-headers" from boost-install, 
since running install in a subproject would fall over not being able to 
find the "/boost" project.  I tried a couple of ways to try and get that 
project defined in the subproject (putting a use-project inside the 
module part of the boost-install rule doesn't do the trick).  Removing 
the dependency means the boost headers don't get installed or updated if 
you run install in a subproject.

Maybe someone else has an idea how to fix #3 better?

I've attached a patch.

-- 
Jon Biggar
Floorboard Software
jon_at_[hidden]
jon_at_[hidden]

--- Jamroot.orig	2008-07-14 21:04:33.063171000 -0700
+++ Jamroot.new	2008-07-14 21:29:17.837692000 -0700
@@ -342,7 +342,7 @@
 # Install to system location.
 
 local install-requirements =
-    <install-source-root>boost
+    <install-source-root>$(BOOST_ROOT)/boost
     ;
 if $(layout-versioned)
 {
@@ -361,6 +361,8 @@
     install-requirements += <install-default-prefix>/usr/local ;
 }
 
+constant BOOST_INSTALL_REQUIREMENTS : $(install-requirements) ;
+
 local headers =
     [ path.glob-tree boost : *.hpp *.ipp *.h *.inc : CVS ]
     [ path.glob-tree boost/compatibility/cpp_c_headers : c* : CVS ]
@@ -479,11 +481,11 @@
 rule boost-install ( libraries * )
 {
     package.install install
-        : <dependency>/boost//install-headers $(install-requirements)
+        : $(BOOST_INSTALL_REQUIREMENTS)
         : # No binaries
         : $(libraries)
-        : # No headers, it's handled by the dependency
-    ;
+        : # No headers
+        ;
 
     install stage : $(libraries) : <location>$(BOOST_STAGE_LOCATE) ;