add a guard for history saving, to enable building without GNU history library

diff --git a/src/main/interactive_shell.cpp b/src/main/interactive_shell.cpp
index 1d1f447be6496d03fe6588a1f24b979403954c37..ef576839c9c8b5960aaa7058a275d11942cbb39f 100644 (file)
--- a/src/main/interactive_shell.cpp
+++ b/src/main/interactive_shell.cpp
@@ -134,6 +134,7 @@ InteractiveShell::InteractiveShell(ExprManager& exprManager,
 }/* InteractiveShell::InteractiveShell() */
 
 InteractiveShell::~InteractiveShell() {
+#if HAVE_LIBREADLINE
   int err = ::write_history(d_historyFilename.c_str());
   if(err == 0) {
     Notice() << "Wrote " << ::history_length << " lines of history to "
@@ -142,6 +143,7 @@ InteractiveShell::~InteractiveShell() {
     Notice() << "Could not write history to " << d_historyFilename
              << ": " << strerror(err) << std::endl;
   }
+#endif /* HAVE_LIBREADLINE */
 }
 
 Command* InteractiveShell::readCommand() {