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+?RCS: $Id: d_end_symbol.U 167 2013-05-08 17:58:00Z rmanfredi $
+?RCS: Copyright (c) 2011, Raphael Manfredi
+?RCS: You may redistribute only under the terms of the Artistic License,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic License; a copy of which may be found at the root
+?RCS: of the source tree for dist 4.0.
+?MAKE:d_end_symbol: Trylink cat
+?MAKE: -pick add $@ %<
+?S: This variable conditionally defines HAS_END_SYMBOL if the
+?S: linker-defined symbol "end" is available to compute the end
+?S: address of the program's BSS segment.
+?C: This symbol, if defined, indicates that the C program can declare
+?C: extern const int end;
+?C: and then use &end to know the end of the BSS segment.
+?H:#$d_end_symbol HAS_END_SYMBOL /**/
+?LINT:set d_end_symbol
+: see if the end symbol exists
+$cat >try.c <<EOC
+int main(void)
+ extern int end;
+ return (int) &end >> 12;
+cyn="whether your linker defines the end symbol"
+set d_end_symbol
+eval $trylink