Assign pre-defined semantics to config.<project>.develop variables

This variable allows a project to distinguish between development and
consumption builds. While normally there is no distinction between these two
modes, sometimes a project may need to provide additional functionality during
development. For example, a source code generator which uses its own generated
code in its implementation may need to provide a bootstrap step from the
pre-generated code. Normally, such a step is only needed during development.
See "Project Configuration" in the manual for details.

1 files changed, 8 insertions, 5 deletions

diff --git a/libbuild2/config/utility.ixx b/libbuild2/config/utility.ixx
index 79d5470..d8348bd 100644
--- a/libbuild2/config/utility.ixx
+++ b/libbuild2/config/utility.ixx
@@ -6,22 +6,25 @@ namespace build2
   namespace config
   {
     LIBBUILD2_SYMEXPORT pair<lookup, bool>
-    lookup_config_impl (scope&, const variable&);
+    lookup_config_impl (scope&, const variable&, uint64_t);
 
     template <typename T>
     pair<lookup, bool>
     lookup_config_impl (scope&, const variable&, T&&, uint64_t, bool);
 
     inline lookup
-    lookup_config (scope& rs, const variable& var)
+    lookup_config (scope& rs, const variable& var, uint64_t sflags)
     {
-      return lookup_config_impl (rs, var).first;
+      return lookup_config_impl (rs, var, sflags).first;
     }
 
     inline lookup
-    lookup_config (bool& new_value, scope& rs, const variable& var)
+    lookup_config (bool& new_value,
+                   scope& rs,
+                   const variable& var,
+                   uint64_t sflags)
     {
-      auto r (lookup_config_impl (rs, var));
+      auto r (lookup_config_impl (rs, var, sflags));
       new_value = new_value || r.second;
       return r.first;
     }