reduce import symbols

src/runtime/c/pgf/db.h

@@ -112,8 +112,8 @@ private:
     PGF_INTERNAL_DECL void unregister_process();
 
 
-    void lock(DB_scope_mode m);
-    void unlock();
+    PGF_INTERNAL_DECL void lock(DB_scope_mode m);
+    PGF_INTERNAL_DECL void unlock();
 
     friend class DB_scope;
 };

src/runtime/c/pgf/writer.cxx

@@ -55,7 +55,7 @@ void PgfWriter::write_double(double d)
 	unsigned rawexp;
 	uint64_t mantissa;
 
-	switch (fpclassify(d)) {
+	switch (::fpclassify(d)) {
 	case FP_NAN:
 		rawexp   = 0x7ff;
 		mantissa = 1;