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-rw-r--r--build2/context.hxx12
1 files changed, 11 insertions, 1 deletions
diff --git a/build2/context.hxx b/build2/context.hxx
index 68faa9b..6f3cc85 100644
--- a/build2/context.hxx
+++ b/build2/context.hxx
@@ -277,7 +277,17 @@ namespace build2
extern const variable* var_import_target; // import.target
extern const variable* var_clean; // [bool] target visibility
- extern const variable* var_backlink; // [bool] target visibility
+
+ // Forwarded configuration backlink mode. Valid values are:
+ //
+ // false - no link.
+ // true - make a link using appropriate mechanism.
+ // symbolic - make a symbolic link.
+ // hard - make a hard link.
+ // copy - make a copy.
+ // overwrite - copy over but don't remove on clean (committed gen code).
+ //
+ extern const variable* var_backlink; // [string] target visibility
extern const char var_extension[10]; // "extension"