Bison torture test for alloca (patch)

[Paul Eggert]

Currently, the torture tests for alloca actually test malloc, due to
the recent changes to yacc.c.  I installed this to fix the problem for
GCC (though not for non-GCC hosts that have alloca):

2004-12-25  Paul Eggert  <address@hidden>

        * tests/torture.at (Exploding the Stack Size with Alloca): Set
        YYSTACK_USE_ALLOCA to 1 if __GNUC__ or alloca are defined;
        otherwise, we're not testing alloca.  Unfortunately there's no
        simple way to consult HAVE_ALLOCA here.

--- torture.at  21 Jun 2004 20:20:31 -0000      1.23
+++ torture.at  26 Dec 2004 06:12:18 -0000      1.24
@@ -439,7 +439,11 @@ AT_COMPILE([input])
 
 AT_SETUP([Exploding the Stack Size with Alloca])
 
-AT_DATA_STACK_TORTURE
+AT_DATA_STACK_TORTURE([[
+#if defined __GNUC__ || defined alloca
+# define YYSTACK_USE_ALLOCA 1
+#endif
+]])
 
 # Below the limit of 200.
 AT_PARSER_CHECK([./input 20], 0, [], [ignore])