[GOLD] Increase --split-stack-adjust-size

[Alan Modra]

For functions with small (< 256 bytes) stack frames, the current x86
do_calls_non_split ignores --split-stack-adjust-size and, in
combination with __morestack_non_split, supplies a non-split-stack
function with at least 0x100000 (1M) available stack.  On powerpc64, a
default of 0x4000 is not large enough to reliably work with the golang
testsuite.  This increase the default size to the defacto x86 value.

	* options.h (split_stack_adjust_size): Default to 0x100000.

diff --git a/gold/options.h b/gold/options.h
index bc211151de..51d3614e6b 100644
--- a/gold/options.h
+++ b/gold/options.h
@@ -1260,7 +1260,7 @@ class General_options
 		 "output sections"),
 	      N_("(PowerPC only) Each output section has its own stubs"));
 
-  DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000,
+  DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x100000,
 	      N_("Stack size when -fsplit-stack function calls non-split"),
 	      N_("SIZE"));
 

-- 
Alan Modra
Australia Development Lab, IBM