Commit 65501622 authored by Chris Zankel's avatar Chris Zankel
Browse files

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: default avatarChris 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))

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