doc in makefile.am
diff --git a/gtp/Makefile.in b/gtp/Makefile.in
index 661c7dc..3a6f08e 100644
--- a/gtp/Makefile.in
+++ b/gtp/Makefile.in
@@ -74,6 +74,7 @@
 DEPDIR = @DEPDIR@
 DLLTOOL = @DLLTOOL@
 ECHO = @ECHO@
+EXEC_LDFLAGS = @EXEC_LDFLAGS@
 INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
 LIBTOOL = @LIBTOOL@
 LN_S = @LN_S@