libs/symtab: move symtab/ to libs/symtab. Let's no clutter up the top level directory. Shorten CONFIG_EXECFUNCS_GENERATE_SYSTEM_SYSTAB to just CONFIG_EXECFUNCS_SYSTEM_SYMTAB. Some items in syscall/syscall.csv are only valid when CONFIG_LIB_SYSCALL is defined. That is always defined when really building the syatem calls, but causes errors in libs/symtab because they are not valid in the normal, FLAT build context.

libs/libc/unistd/Kconfig

@@ -54,6 +54,7 @@ config EXECFUNCS_HAVE_SYMTAB
 		from your application initialization logic.
 
 if EXECFUNCS_HAVE_SYMTAB
+
 config EXECFUNCS_SYMTAB_ARRAY
 	string "Symbol table name used by exec[l|v]"
 	default "g_symtab"
@@ -76,7 +77,7 @@ config EXECFUNCS_NSYMBOLS_VAR
 		symbols in that table.  This selection provides the name of an 'int'
 		variable that contains the number of symbols in the symbol table.
 
-config EXECFUNCS_GENERATE_SYSTEM_SYMTAB
+config EXECFUNCS_SYSTEM_SYMTAB
 	bool "Generate and include system symbol table"
 	default n
 	---help---
@@ -89,6 +90,7 @@ config EXECFUNCS_GENERATE_SYSTEM_SYMTAB
 		number of exported symbols g_nsymbols. It matches expected defaults
 		from entries above. But they can be changed and generated symbol table
 		can be used as template by application.
+
 endif # EXECFUNCS_HAVE_SYMTAB
 endif # LIBC_EXECFUNCS
 

libs/symtab/Makefile

@@ -1,5 +1,5 @@
 ############################################################################
-# symtab/Makefile
+# libs/symtab/Makefile
 #
 #   Copyright (C) 2019 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>
@@ -59,7 +59,7 @@ SYMTAB_CSRCS  =
 
 BIN = libsymtab$(LIBEXT)
 
-ifeq ($(CONFIG_EXECFUNCS_GENERATE_SYSTEM_SYMTAB),y)
+ifeq ($(CONFIG_EXECFUNCS_SYSTEM_SYMTAB),y)
 
 all: symtab.c $(BIN)
 .PHONY: all
@@ -104,4 +104,3 @@ distclean: clean
 	$(call DELFILE, tmp.csv)
 
 -include Make.dep
-

syscall/syscall.csv

@@ -63,7 +63,7 @@
 "mq_timedreceive","mqueue.h","!defined(CONFIG_DISABLE_MQUEUE)","ssize_t","mqd_t","char*","size_t","FAR unsigned int*","const struct timespec*"
 "mq_timedsend","mqueue.h","!defined(CONFIG_DISABLE_MQUEUE)","int","mqd_t","const char*","size_t","unsigned int","const struct timespec*"
 "mq_unlink","mqueue.h","!defined(CONFIG_DISABLE_MQUEUE)","int","const char*"
-"nx_task_spawn","nuttx/spawn.h","!defined(CONFIG_BUILD_KERNEL)","int","FAR const struct spawn_syscall_parms_s *"
+"nx_task_spawn","nuttx/spawn.h","!defined(CONFIG_BUILD_KERNEL) && defined(CONFIG_LIB_SYSCALL)","int","FAR const struct spawn_syscall_parms_s *"
 "nx_vsyslog","nuttx/syslog/syslog.h","","int","int","FAR const IPTR char*","FAR va_list*"
 "on_exit","stdlib.h","defined(CONFIG_SCHED_ONEXIT)","int","CODE void (*)(int, FAR void *)","FAR void *"
 "open","fcntl.h","","int","const char*","int","..."

tools/Directories.mk

@@ -85,10 +85,10 @@ CONTEXTDIRS = boards $(APPDIR)
 USERDIRS =
 OTHERDIRS = pass1
 
-ifeq ($(CONFIG_EXECFUNCS_GENERATE_SYSTEM_SYMTAB),y)
-USERDIRS += symtab
+ifeq ($(CONFIG_EXECFUNCS_SYSTEM_SYMTAB),y)
+USERDIRS += libs$(DELIM)symtab
 else
-OTHERDIRS += symtab
+OTHERDIRS += libs$(DELIM)symtab
 endif
 
 ifeq ($(CONFIG_BUILD_PROTECTED),y)

tools/FlatLibs.mk

@@ -144,7 +144,7 @@ endif
 
 # Add symbol table library
 
-ifeq ($(CONFIG_EXECFUNCS_GENERATE_SYSTEM_SYMTAB),y)
+ifeq ($(CONFIG_EXECFUNCS_SYSTEM_SYMTAB),y)
 NUTTXLIBS += staging$(DELIM)libsymtab$(LIBEXT)
 endif
 

tools/KernelLibs.mk

@@ -138,7 +138,7 @@ endif
 
 # Add symbol table library
 
-ifeq ($(CONFIG_EXECFUNCS_GENERATE_SYSTEM_SYMTAB),y)
+ifeq ($(CONFIG_EXECFUNCS_SYSTEM_SYMTAB),y)
 NUTTXLIBS += staging$(DELIM)libsymtab$(LIBEXT)
 endif
 

tools/LibTargets.mk

@@ -200,10 +200,10 @@ syscall$(DELIM)libproxies$(LIBEXT): context
 staging$(DELIM)libproxies$(LIBEXT): syscall$(DELIM)libproxies$(LIBEXT)
 	$(Q) $(call INSTALL_LIB,$<,$@)
 
-symtab$(DELIM)libsymtab$(LIBEXT): context
-	$(Q) $(MAKE) -C symtab TOPDIR="$(TOPDIR)" libsymtab$(LIBEXT) KERNEL=n
+libs$(DELIM)symtab$(DELIM)libsymtab$(LIBEXT): context
+	$(Q) $(MAKE) -C libs$(DELIM)symtab TOPDIR="$(TOPDIR)" libsymtab$(LIBEXT) KERNEL=n
 
-staging$(DELIM)libsymtab$(LIBEXT): symtab$(DELIM)libsymtab$(LIBEXT)
+staging$(DELIM)libsymtab$(LIBEXT): libs$(DELIM)symtab$(DELIM)libsymtab$(LIBEXT)
 	$(Q) $(call INSTALL_LIB,$<,$@)
 
 # Possible non-kernel builds

tools/ProtectedLibs.mk

@@ -145,7 +145,7 @@ endif
 
 # Add symbol table library
 
-ifeq ($(CONFIG_EXECFUNCS_GENERATE_SYSTEM_SYMTAB),y)
+ifeq ($(CONFIG_EXECFUNCS_SYSTEM_SYMTAB),y)
 NUTTXLIBS += staging$(DELIM)libsymtab$(LIBEXT)
 endif