From 1da2f6b685bfb9bb6113633d5b10f56952a4066a Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 13 Aug 2019 09:45:00 -0600
Subject: [PATCH] symtab/Makefile:  The OS symbol table should not be generated
 in the PROTECTED and KERNEL build modes.  In those modes, the applications
 should link with libproxy which will provide symbol-compatible access to OS
 functions via a call gate.

---
 symtab/Makefile | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/symtab/Makefile b/symtab/Makefile
index c4429949b2c..1fbcb2d33f1 100644
--- a/symtab/Makefile
+++ b/symtab/Makefile
@@ -36,9 +36,22 @@
 -include $(TOPDIR)/Make.defs
 
 MKSYMTAB = $(TOPDIR)$(DELIM)tools$(DELIM)mksymtab$(HOSTEXEEXT)
-CSVFILES = $(TOPDIR)$(DELIM)syscall$(DELIM)syscall.csv \
-	$(TOPDIR)$(DELIM)libs$(DELIM)libc$(DELIM)libc.csv \
-	$(TOPDIR)$(DELIM)libs$(DELIM)libc$(DELIM)math.csv
+
+# C library and math library symbols should be available in the FLAT
+# and PROTECTED builds.  KERNEL builds are separately linked and so should
+# not need symbol tables.
+
+CSVFILES  = $(TOPDIR)$(DELIM)libs$(DELIM)libc$(DELIM)libc.csv
+CSVFILES += $(TOPDIR)$(DELIM)libs$(DELIM)libc$(DELIM)math.csv
+
+# In the PROTECTED and KERNEL builds, the syscall symbol table is not
+# necessary.  In those build modes, the applications should link with
+# libproxy which will provide symbol-compatible access to OS functions
+# via a call gate.
+
+ifeq ($(CONFIG_BUILD_FLAT),y)
+CSVFILES += $(TOPDIR)$(DELIM)syscall$(DELIM)syscall.csv
+endif
 
 DEPPATH = --dep-path .