Add __bss_start__ and __bss_end__, improves compatibility with other software

teensy3/mk20dx128.ld

 
 	.bss : {
 		. = ALIGN(4);
-		_sbss = .; 
+		_sbss = .;
+		__bss_start__ = .;
 		*(.bss*)
 		*(COMMON)
 		. = ALIGN(4);
 		_ebss = .;
 		__bss_end = .;
+		__bss_end__ = .;
 	} > RAM
 
 	_estack = ORIGIN(RAM) + LENGTH(RAM);

teensy3/mk20dx256.ld

 }
 
 
-/* INCLUDE common.ld */
-
-
-/* Teensyduino Core Library
- * http://www.pjrc.com/teensy/
- * Copyright (c) 2013 PJRC.COM, LLC.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * 1. The above copyright notice and this permission notice shall be 
- * included in all copies or substantial portions of the Software.
- *
- * 2. If the Software is incorporated into a build system that allows 
- * selection among a list of target devices, then similar target
- * devices manufactured by PJRC.COM must be included in the list of
- * target devices and selectable in the same manner.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-
-
 SECTIONS
 {
 	.text : {
 
 	.bss : {
 		. = ALIGN(4);
-		_sbss = .; 
+		_sbss = .;
+		__bss_start__ = .;
 		*(.bss*)
 		*(COMMON)
 		. = ALIGN(4);
 		_ebss = .;
 		__bss_end = .;
+		__bss_end__ = .;
 	} > RAM
 
 	_estack = ORIGIN(RAM) + LENGTH(RAM);

teensy3/mk66fx1m0.ld

 }
 
 
-/* INCLUDE common.ld */
-
-
-/* Teensyduino Core Library
- * http://www.pjrc.com/teensy/
- * Copyright (c) 2013 PJRC.COM, LLC.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * 1. The above copyright notice and this permission notice shall be 
- * included in all copies or substantial portions of the Software.
- *
- * 2. If the Software is incorporated into a build system that allows 
- * selection among a list of target devices, then similar target
- * devices manufactured by PJRC.COM must be included in the list of
- * target devices and selectable in the same manner.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-
-
 SECTIONS
 {
 	.text : {
 
 	.bss : {
 		. = ALIGN(4);
-		_sbss = .; 
+		_sbss = .;
+		__bss_start__ = .;
 		*(.bss*)
 		*(COMMON)
 		. = ALIGN(4);
 		_ebss = .;
 		__bss_end = .;
+		__bss_end__ = .;
 	} > RAM
 
 	_estack = ORIGIN(RAM) + LENGTH(RAM);

teensy3/mkl26z64.ld

 
 	.bss : {
 		. = ALIGN(4);
-		_sbss = .; 
+		_sbss = .;
+		__bss_start__ = .;
 		*(.bss*)
 		*(COMMON)
 		. = ALIGN(4);
 		_ebss = .;
 		__bss_end = .;
+		__bss_end__ = .;
 	} > RAM
 
 	_estack = ORIGIN(RAM) + LENGTH(RAM);