From b630e6a153323697dc66686a44804c6b43aaaec2 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Thu, 25 Apr 2013 15:52:48 -0600
Subject: [PATCH] Useless TIOCSERGSTRUCT logic in most serial drivers is not
 compiled unless CONFIG_DEBUG and CONFIG_SERIAL_TIOCSERGSTRUCT are defined

---
 ChangeLog                             |  4 ++++
 arch/arm/src/c5471/c5471_serial.c     |  4 +++-
 arch/arm/src/calypso/calypso_serial.c |  4 +++-
 arch/arm/src/dm320/dm320_serial.c     |  4 +++-
 arch/arm/src/imx/imx_serial.c         |  4 +++-
 arch/arm/src/kinetis/Kconfig          |  8 ++++----
 arch/arm/src/lm/lm_serial.c           |  4 +++-
 arch/arm/src/lpc17xx/lpc17_serial.c   |  2 ++
 arch/arm/src/lpc214x/Kconfig          |  2 +-
 arch/arm/src/lpc214x/lpc214x_serial.c |  4 +++-
 arch/arm/src/lpc2378/lpc23xx_serial.c |  4 +++-
 arch/arm/src/lpc31xx/lpc31_serial.c   |  4 +++-
 arch/arm/src/lpc43xx/lpc43_serial.c   |  4 +++-
 arch/arm/src/nuc1xx/nuc_serial.c      |  2 ++
 arch/arm/src/sam3u/sam3u_serial.c     |  4 +++-
 arch/arm/src/stm32/stm32_serial.c     |  2 ++
 arch/arm/src/str71x/str71x_serial.c   |  4 +++-
 drivers/serial/Kconfig                | 14 +++++++++++++-
 drivers/serial/uart_16550.c           |  4 +++-
 19 files changed, 64 insertions(+), 18 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index dcaf044101..e6cbea97d4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4628,3 +4628,7 @@
 	  could be a good feature, the codes have not be well utilized nor
 	  documented.  Give that situation it is better to remove the API
 	  and reduce the footprint a little (2014-4-25).
+	* drivers/serial/Kconfig and arch/*/src/*/*_serial.c:  Add
+	  compilation so that the useless TIOCSERGSTRUCT ioctl logic
+	  is not build unless CONFIG_DEBUG and CONFIG_SERIAL_TIOCSERGSTRUCT
+	  are defined.
diff --git a/arch/arm/src/c5471/c5471_serial.c b/arch/arm/src/c5471/c5471_serial.c
index cdc5b6f24c..09018cb282 100644
--- a/arch/arm/src/c5471/c5471_serial.c
+++ b/arch/arm/src/c5471/c5471_serial.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * c5471/c5471_serial.c
  *
- *   Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -620,6 +620,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -633,6 +634,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
       {
diff --git a/arch/arm/src/calypso/calypso_serial.c b/arch/arm/src/calypso/calypso_serial.c
index 5817b338b7..ddb37201dc 100644
--- a/arch/arm/src/calypso/calypso_serial.c
+++ b/arch/arm/src/calypso/calypso_serial.c
@@ -5,7 +5,7 @@
  *   Author: Stefan Richter <ichgeh@l--putt.de>
  *
  * based on c5471/c5471_serial.c
- *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -707,6 +707,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -720,6 +721,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
       {
diff --git a/arch/arm/src/dm320/dm320_serial.c b/arch/arm/src/dm320/dm320_serial.c
index fbeefd8e90..5b944b9b7f 100644
--- a/arch/arm/src/dm320/dm320_serial.c
+++ b/arch/arm/src/dm320/dm320_serial.c
@@ -2,7 +2,7 @@
  * arch/arm/src/dm320/dm320_serial.c
  * arch/arm/src/chip/dm320_serial.c
  *
- *   Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -546,6 +546,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -559,6 +560,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
       {
diff --git a/arch/arm/src/imx/imx_serial.c b/arch/arm/src/imx/imx_serial.c
index d7a4c3296c..d7ac1a7325 100644
--- a/arch/arm/src/imx/imx_serial.c
+++ b/arch/arm/src/imx/imx_serial.c
@@ -2,7 +2,7 @@
  * arch/arm/src/imx/imx_serial.c
  * arch/arm/src/chip/imx_serial.c
  *
- *   Copyright (C) 2009, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -885,6 +885,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -898,6 +899,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
     case TIOCCBRK:  /* BSD compatibility: Turn break off, unconditionally */
diff --git a/arch/arm/src/kinetis/Kconfig b/arch/arm/src/kinetis/Kconfig
index c444c065fb..bdca8c68b2 100644
--- a/arch/arm/src/kinetis/Kconfig
+++ b/arch/arm/src/kinetis/Kconfig
@@ -395,14 +395,14 @@ config ENET_NRXBUFFERS
 	default 6
 	---help---
 		Number of Ethernet Rx buffers to use.  The size of one buffer is
-		determined by CONFIG_NET_BUFSIZE
+		determined by NET_BUFSIZE
 
 config ENET_NTXBUFFERS
 	int "Number of Ethernet Tx buffers"
 	default 2
 	---help---
 		Number of Ethernet Tx buffers to use. The size of one buffer is
-		determined by CONFIG_NET_BUFSIZE
+		determined by NET_BUFSIZE
 
 config ENET_PHYADDR
 	int "PHY address"
@@ -451,14 +451,14 @@ config KINETIS_MMCXFR_FREQ
 config KINETIS_SD1BIT_FREQ
 	int "SD 1-bit transfer frequency"
 	default 20000000
-	depends on CONFIG_SDIO_WIDTH_D1_ONLY
+	depends on SDIO_WIDTH_D1_ONLY
 	---help---
 		Frequency to use for transferring data to/from an SD card using on a single data liune.
 
 config KINETIS_SD4BIT_FREQ
 	int "SD 4-bit transfer frequency"
 	default 20000000
-	depends on !CONFIG_SDIO_WIDTH_D1_ONLY
+	depends on !SDIO_WIDTH_D1_ONLY
 	---help---
 		Frequency to use for transferring data to/from an SD card using all four data lines.
 
diff --git a/arch/arm/src/lm/lm_serial.c b/arch/arm/src/lm/lm_serial.c
index 6e772ecd50..f2e9796cfe 100644
--- a/arch/arm/src/lm/lm_serial.c
+++ b/arch/arm/src/lm/lm_serial.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * arch/arm/src/lm/lm_serial.c
  *
- *   Copyright (C) 2009-2010, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009-2010, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1019,6 +1019,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -1032,6 +1033,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     default:
       ret = -ENOTTY;
diff --git a/arch/arm/src/lpc17xx/lpc17_serial.c b/arch/arm/src/lpc17xx/lpc17_serial.c
index b2da4839f2..6bf519ac30 100644
--- a/arch/arm/src/lpc17xx/lpc17_serial.c
+++ b/arch/arm/src/lpc17xx/lpc17_serial.c
@@ -1169,6 +1169,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
         struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -1182,6 +1183,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
           }
       }
       break;
+#endif
 
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
       {
diff --git a/arch/arm/src/lpc214x/Kconfig b/arch/arm/src/lpc214x/Kconfig
index 5d52eb0001..25b82bd6b1 100644
--- a/arch/arm/src/lpc214x/Kconfig
+++ b/arch/arm/src/lpc214x/Kconfig
@@ -117,7 +117,7 @@ config LPC214X_USBDEV_DMA
 	bool "USB Device DMA Support"
 	default n
 
-config CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS
+config LPC214X_USBDEV_NDMADESCRIPTORS
 	int "Number of USB DMA Descriptors"
 	default 8
 	depends on LPC214X_USBDEV_DMA
diff --git a/arch/arm/src/lpc214x/lpc214x_serial.c b/arch/arm/src/lpc214x/lpc214x_serial.c
index c647e458a8..f27eea9772 100644
--- a/arch/arm/src/lpc214x/lpc214x_serial.c
+++ b/arch/arm/src/lpc214x/lpc214x_serial.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * arch/arm/src/lpc214x/lpc214x_serial.c
  *
- *   Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -569,6 +569,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -582,6 +583,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
       {
diff --git a/arch/arm/src/lpc2378/lpc23xx_serial.c b/arch/arm/src/lpc2378/lpc23xx_serial.c
index 08fe4ec73e..6fcb503f3b 100644
--- a/arch/arm/src/lpc2378/lpc23xx_serial.c
+++ b/arch/arm/src/lpc2378/lpc23xx_serial.c
@@ -7,7 +7,7 @@
  *
  * This file is part of the NuttX RTOS and based on the lpc2148 port:
  *
- *   Copyright (C) 2010, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2010, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -692,6 +692,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
         struct up_dev_s *user = (struct up_dev_s *)arg;
@@ -705,6 +706,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
           }
       }
       break;
+#endif
 
     case TIOCSBRK:             /* BSD compatibility: Turn break on,
                                  * unconditionally */
diff --git a/arch/arm/src/lpc31xx/lpc31_serial.c b/arch/arm/src/lpc31xx/lpc31_serial.c
index c383253138..f5f2c57832 100644
--- a/arch/arm/src/lpc31xx/lpc31_serial.c
+++ b/arch/arm/src/lpc31xx/lpc31_serial.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * arch/arm/src/lpc31xx/lpc31_serial.c
  *
- *   Copyright (C) 2009, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -582,6 +582,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -595,6 +596,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
       {
diff --git a/arch/arm/src/lpc43xx/lpc43_serial.c b/arch/arm/src/lpc43xx/lpc43_serial.c
index adbfb282a7..8736d5db21 100644
--- a/arch/arm/src/lpc43xx/lpc43_serial.c
+++ b/arch/arm/src/lpc43xx/lpc43_serial.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * arch/arm/src/lpc43xx/lpc43_serial.c
  *
- *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1080,6 +1080,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -1093,6 +1094,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
 #ifdef CONFIG_SERIAL_TERMIOS
     case TCGETS:
diff --git a/arch/arm/src/nuc1xx/nuc_serial.c b/arch/arm/src/nuc1xx/nuc_serial.c
index c07ef1109c..6ecfb11598 100644
--- a/arch/arm/src/nuc1xx/nuc_serial.c
+++ b/arch/arm/src/nuc1xx/nuc_serial.c
@@ -760,6 +760,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
         struct nuc_dev_s *user = (struct nuc_dev_s*)arg;
@@ -773,6 +774,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
           }
       }
       break;
+#endif
 
     case TIOCSBRK:   /* BSD compatibility: Turn break on, unconditionally */
     case TIOCCBRK:   /* BSD compatibility: Turn break off, unconditionally */
diff --git a/arch/arm/src/sam3u/sam3u_serial.c b/arch/arm/src/sam3u/sam3u_serial.c
index a4d79a11b6..ef1345f8e2 100644
--- a/arch/arm/src/sam3u/sam3u_serial.c
+++ b/arch/arm/src/sam3u/sam3u_serial.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * arch/arm/src/sam3u/sam3u_serial.c
  *
- *   Copyright (C) 2010, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2010, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -1138,6 +1138,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -1151,6 +1152,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     default:
       ret = -ENOTTY;
diff --git a/arch/arm/src/stm32/stm32_serial.c b/arch/arm/src/stm32/stm32_serial.c
index c04bcc9ee9..4594c187e8 100644
--- a/arch/arm/src/stm32/stm32_serial.c
+++ b/arch/arm/src/stm32/stm32_serial.c
@@ -1621,6 +1621,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
         struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -1634,6 +1635,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
           }
       }
       break;
+#endif
 
 #ifdef CONFIG_STM32_USART_SINGLEWIRE
     case TIOCSSINGLEWIRE:
diff --git a/arch/arm/src/str71x/str71x_serial.c b/arch/arm/src/str71x/str71x_serial.c
index 2098758b1c..2356898bb5 100644
--- a/arch/arm/src/str71x/str71x_serial.c
+++ b/arch/arm/src/str71x/str71x_serial.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * arch/arm/src/str71x/str71x_serial.c
  *
- *   Copyright (C) 2008-2009, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2008-2009, 2012-2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -759,6 +759,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
          struct up_dev_s *user = (struct up_dev_s*)arg;
@@ -772,6 +773,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
            }
        }
        break;
+#endif
 
     default:
       ret = -ENOTTY;
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index ff81ae5599..d512784a4d 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -336,7 +336,7 @@ config STANDARD_SERIAL
 	---help---
 		Enable the standard, upper-half serial driver used by most MCU serial peripherals.
 
-config CONFIG_SERIAL_NPOLLWAITERS
+config SERIAL_NPOLLWAITERS
 	int "Number of poll threads"
 	default 2
 	depends on !DISABLE_POLL && STANDARD_SERIAL
@@ -344,6 +344,18 @@ config CONFIG_SERIAL_NPOLLWAITERS
 		Maximum number of threads than can be waiting for POLL events.
 		Default: 2
 
+config SERIAL_TIOCSERGSTRUCT
+	bool "Support TIOCSERGSTRUCT"
+	default n
+	depends on DEBUG && (MCU_SERIAL || 16550_UART)
+	---help---
+		As a debug option, many serial bottom half drivers support the TIOCSERGSTRUCT
+		that allows you to get the internal drvier data structure.  By default, this
+		IOCTL is not supported in order to reduce footprint.  But if (1) the driver
+		supports the TIOCSERGSTRUCT ioctl, and (2) this option is selected, then
+		support for the TIOCSERGSTRUCT will be enabled.
+
+
 #
 # U[S]ARTn_XYZ settings for MCU serial drivers
 #
diff --git a/drivers/serial/uart_16550.c b/drivers/serial/uart_16550.c
index fbd8104263..ac025bcfa3 100644
--- a/drivers/serial/uart_16550.c
+++ b/drivers/serial/uart_16550.c
@@ -2,7 +2,7 @@
  * drivers/serial/uart_16550.c
  * Serial driver for 16550 UART
  *
- *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011, 2013 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -865,6 +865,7 @@ static int u16550_ioctl(struct file *filep, int cmd, unsigned long arg)
 
   switch (cmd)
     {
+#ifdef CONFIG_SERIAL_TIOCSERGSTRUCT
     case TIOCSERGSTRUCT:
       {
         struct u16550_s *user = (struct u16550_s*)arg;
@@ -879,6 +880,7 @@ static int u16550_ioctl(struct file *filep, int cmd, unsigned long arg)
           }
       }
       break;
+#endif
 
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
       {