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Commit 65501622 authored Nov 13, 2012 by Chris Zankel

xtensa: add config option to disable linker relaxation



The default linker behavior is to optimize identical literal values and
remove unnecessary overhead from assembler-generated "longcall" sequences
to reduce code size. Provide an option to disable this behavior to improve
compile time.

Signed-off-by: Chris Zankel <chris@zankel.net>

parent 02b25d81

arch/xtensa/Kconfig.debug

+11 −2

Original line number	Diff line number	Diff line
		@@ -2,6 +2,15 @@ menu "Kernel hacking"

		source "lib/Kconfig.debug"

		endmenu

		config LD_NO_RELAX
		bool "Disable linker relaxation"
		default n
		help
		Enable this function to disable link-time optimizations.
		The default linker behavior is to combine identical literal
		values to reduce code size and remove unnecessary overhead from
		assembler-generated 'longcall' sequences.
		Enabling this option improves the link time but increases the
		code size, and possibly execution time.

		endmenu

arch/xtensa/Makefile

+4 −0

Original line number	Diff line number	Diff line
		@@ -49,6 +49,10 @@ KBUILD_CFLAGS += -pipe -mlongcalls

		KBUILD_CFLAGS += $(call cc-option,-mforce-no-pic,)

		ifneq ($(CONFIG_LD_NO_RELAX),)
		LDFLAGS := --no-relax
		endif

		vardirs := $(patsubst %,arch/xtensa/variants/%/,$(variant-y))
		plfdirs := $(patsubst %,arch/xtensa/platforms/%/,$(platform-y))