From 903a4d866abcff48763c1df8c4756bcde8a8cd34 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sat, 14 Jul 2018 10:34:55 -0600
Subject: [PATCH] libs/libc/unistd/Kconfig:  Revisiting
 664af2a69b58d3ab548160641b3b49d52cb1fff6, the problem was not that the
 default should be 'not set', the problem is that the conditionals were
 backward.

---
 configs/viewtool-stm32f107/README.txt | 56 +++++++++++++++------------
 libs/libc/unistd/Kconfig              |  3 +-
 2 files changed, 33 insertions(+), 26 deletions(-)

diff --git a/configs/viewtool-stm32f107/README.txt b/configs/viewtool-stm32f107/README.txt
index 996b2cc37999..37d0136acca4 100644
--- a/configs/viewtool-stm32f107/README.txt
+++ b/configs/viewtool-stm32f107/README.txt
@@ -705,33 +705,39 @@ MAX3421E Integration
   -----------------
 
   Using SPI1on J8 pins 7-12, discretes on J18
-  ------ ----------- -----------
-  NAME   VIEWTOOL    STM32
-  ------ ----------- -----------
-  CS#    J8  Pin 12  PA4/NSS1
-  SCK    J8  Pin 11  PA5/SCK1
-  MISO   J8  Pin  9  PA6/MISO1
-  MOSI   J8  Pin 10  PA7/MOSI1
-  INT#   J18 Pin  6  PC5
-  RST#   J18 Pin  8  PA1
-  VBUS   J18 Pin 10  PA0
-
-  3.3V   J8  Pin 7
-  GND    J8  Pin 8
+
+    ------ ----------- -----------
+    NAME   VIEWTOOL    STM32
+    ------ ----------- -----------
+    CS#    J8  Pin 12  PA4/NSS1
+    SCK    J8  Pin 11  PA5/SCK1
+    MISO   J8  Pin  9  PA6/MISO1
+    MOSI   J8  Pin 10  PA7/MOSI1
+    INT#   J18 Pin  6  PC5
+    RST#   J18 Pin  8  PA1
+    VBUS   J18 Pin 10  PA0
+    3.3V   J8  Pin 7
+    GND    J8  Pin 8
 
   Using SPI2 on J8 pins 1-6, discretes on J18
-  ------ ----------- -----------
-  NAME   VIEWTOOL    STM32
-  ------ ----------- -----------
-  CS#    J8  Pin  6  PB12/NSS2
-  SCK    J8  Pin  5  PB13/SCK2
-  MISO   J8  Pin  3  PB14/MISO2
-  MOSI   J8  Pin  4  PB15/MOSI2
-  INT#   J18 Pin  6  PC5
-  RST#   J18 Pin  8  PA1
-  VBUS   J18 Pin 10  PA0
-  3.3V   J8  Pin 1
-  GND    J8  Pin 2
+
+    ------ ----------- -----------
+    NAME   VIEWTOOL    STM32
+    ------ ----------- -----------
+    CS#    J8  Pin  6  PB12/NSS2
+    SCK    J8  Pin  5  PB13/SCK2
+    MISO   J8  Pin  3  PB14/MISO2
+    MOSI   J8  Pin  4  PB15/MOSI2
+    INT#   J18 Pin  6  PC5
+    RST#   J18 Pin  8  PA1
+    VBUS   J18 Pin 10  PA0
+    3.3V   J8  Pin 1
+    GND    J8  Pin 2
+
+  5V VBUS power is also needed.  This might be directly connected to the USB
+  host connector (as assumed here), or switched via additional logic.  Then
+  GPX pin might also be necessary if VBUS detect is used with self-powered
+  devices.
 
   Configuration Options
   ---------------------
diff --git a/libs/libc/unistd/Kconfig b/libs/libc/unistd/Kconfig
index 9b2bf2e9a66b..1f4d10063ddd 100644
--- a/libs/libc/unistd/Kconfig
+++ b/libs/libc/unistd/Kconfig
@@ -35,7 +35,8 @@ if LIBC_EXECFUNCS
 
 config EXECFUNCS_HAVE_SYMTAB
 	bool "Have symbol table"
-	default n
+	default n if !BUILD_KERNEL
+	default y if BUILD_KERNEL
 	---help---
 		If you have a system symbol table, then you may select this
 		option in order to use it.  Symbol tables are required in most