mame	2018-02-15 10:59:17 +0900 (Thu, 15 Feb 2018)

  New Revision: 62410

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=62410

  Log:
    gc.c: force STACK_GROW_DIRECTION for emscripten
    
    The configure script fails to guess the direction on emscripten.
    Perhaps this is because of https://github.com/kripken/emscripten/issues/2093

  Modified files:
    trunk/gc.c
Index: gc.c
===================================================================
--- gc.c	(revision 62409)
+++ gc.c	(revision 62410)
@@ -3996,6 +3996,11 @@ init_mark_stack(mark_stack_t *stack) https://github.com/ruby/ruby/blob/trunk/gc.c#L3996
 #define STACK_END (ec->machine.stack_end)
 #define STACK_LEVEL_MAX (ec->machine.stack_maxsize/sizeof(VALUE))
 
+#ifdef __EMSCRIPTEN__
+#undef STACK_GROW_DIRECTION
+#define STACK_GROW_DIRECTION 1
+#endif
+
 #if STACK_GROW_DIRECTION < 0
 # define STACK_LENGTH  (size_t)(STACK_START - STACK_END)
 #elif STACK_GROW_DIRECTION > 0

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