Use const references in BuildInfo::Tracked operators

[builder.git] / source / buildinfo.h

diff --git a/source/buildinfo.h b/source/buildinfo.h
index 0af7374575e1a5979111ea12c999d99e8a288b45..5528748fc55c82bfde6b14d09e3ca9bc3313e3bc 100644 (file)
--- a/source/buildinfo.h
+++ b/source/buildinfo.h
@@ -28,6 +28,7 @@ public:
        private:
                void incpath(const std::string &);
                void define(const std::string &, const std::string &);
+               void keep_symbol(const std::string &);
                void libmode_for_lib(const std::string &, LibraryMode);
                void libpath(const std::string &);
                void library(const std::string &);
@@ -65,8 +66,8 @@ public:
                Tracked(T v): value(v), set(false) { }
                Tracked &operator=(const Tracked &v) { if(v.set) { value = v.value; set = true; } return *this; }
 
-               Tracked &operator=(T v) { value = v; set = true; return *this; }
-               operator T() const { return value; }
+               Tracked &operator=(const T &v) { value = v; set = true; return *this; }
+               operator const T &() const { return value; }
        };
 
        typedef std::map<std::string, std::string> DefineMap;
@@ -83,6 +84,7 @@ public:
        WordList libs;
        Tracked<LibraryMode> libmode;
        LibModeMap libmodes;
+       WordList keep_symbols;
        StandardMap standards;
        Tracked<bool> threads;
        Tracked<bool> debug;