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+?RCS: $Id: i_alloca.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:i_alloca: Trylink cat
+?MAKE: -pick add $@ %<
+?S: This variable conditionally defines the I_ALLOCA symbol, which
+?S: indicates to the C program that <alloca.h> exists and should
+?S: be included.
+?C: This symbol, if defined, indicates that <alloca.h> exists and should
+?C: be included.
+?H:#$i_alloca I_ALLOCA /**/
+: see if alloca.h is available
+$cat >try.c <<EOC
+ void *ret = alloca(1);
+ return (unsigned long) ret & 0x1;