From ced5b6d504400d94077783390953d8a1e4463bb4 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sun, 8 Oct 2017 09:45:50 -0600
Subject: [PATCH] libc/stdio:  Build the lib_noflush() and lib_snoflush() stubs
 even if CONFIG_FILE_DESCRIPTORS=0.  They may still be needed.

---
 configs/z80sim/src/Makefile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/configs/z80sim/src/Makefile b/configs/z80sim/src/Makefile
index 0410aedf320..0c5e71b255c 100644
--- a/configs/z80sim/src/Makefile
+++ b/configs/z80sim/src/Makefile
@@ -36,6 +36,10 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-CSRCS = z80_irq.c z80_serial.c z80_timerisr.c z80_lowputc.c
+CSRCS = z80_irq.c z80_timerisr.c z80_lowputc.c
+
+ifneq ($(CONFIG_DISABLE_SIGNALS),y)
+CSRCS += z80_serial.c
+endif
 
 include $(TOPDIR)/configs/Board.mk