From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Zankel Date: Mon, 3 Dec 2012 00:58:46 -0800 Subject: [Buildroot] [PATCH v2] xtensa: add config option to enable longcalls option Message-ID: <50bc6a34.45e8440a.493d.4091@mx.google.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net The longcalls option allows calls across a greater range of addresses. This option should be used when call targets can potentially be out of range. It may degrade both code size and performance, but the linker can generally optimize away the unnecessary overhead when a call ends up within range. This option is enabled by default. Signed-off-by: Chris Zankel --- arch/Config.in.xtensa | 17 +++++++++++++++++ package/Makefile.in | 6 ++++++ 2 files changed, 23 insertions(+) diff --git a/arch/Config.in.xtensa b/arch/Config.in.xtensa index 60c03f5..a979108 100644 --- a/arch/Config.in.xtensa +++ b/arch/Config.in.xtensa @@ -35,3 +35,20 @@ config BR2_XTENSA_OVERLAY_DIR config BR2_ARCH default "xtensa" if BR2_xtensa + +menu "Target build options" + +config BR2_XTENSA_LONGCALLS + bool "Enable longcalls option" + default y + help + Enable or disable transformation of call instructions to allow + calls across a greater range of addresses. + This option should be used when call targets can potentially be + out of range. It may degrade both code size and performance, but + the linker can generally optimize away the unnecessary overhead + when a call ends up within range. + + Should be enabled by default. + +endmenu diff --git a/package/Makefile.in b/package/Makefile.in index 9fdc745..b52d5e0 100644 --- a/package/Makefile.in +++ b/package/Makefile.in @@ -56,6 +56,12 @@ TARGET_ABI+=-mabi=spe -mfloat-gprs=double -Wa,-me500mc endif endif +# Xtensa: The 'longcalls' option is required for large binary packages. +# Use a global option for all packages for now. +ifeq ($(BR2_XTENSA_LONGCALLS),y) +TARGET_CFLAGS += -mlongcalls +endif + STAGING_DIR=$(HOST_DIR)/usr/$(GNU_TARGET_NAME)/sysroot TARGET_OPTIMIZATION:=$(call qstrip,$(BR2_TARGET_OPTIMIZATION)) -- 1.7.9.5