Implement in module

Given test.in containing something along these lines:

foo = $foo$

Now we can do:

using in

file{test}: in{test.in}
file{test}: foo = FOO

The alternative variable substitution symbol can be specified with the
in.symbol variable and lax (instead of the default strict) mode with
in.substitution. For example:

file{test}: in.symbol = '@'
file{test}: in.substitution = lax

1 files changed, 1 insertions, 1 deletions

diff --git a/build2/bin/init.cxx b/build2/bin/init.cxx
index 13e3289..ea4a0f1 100644
--- a/build2/bin/init.cxx
+++ b/build2/bin/init.cxx
@@ -46,7 +46,7 @@ namespace build2
                bool,
                const variable_map&)
     {
-      tracer trace ("cc::core_vars_init");
+      tracer trace ("bin::vars_init");
       l5 ([&]{trace << "for " << r.out_path ();});
 
       assert (first);