[Buildroot] [PATCH] xtensa: add -mlongcalls to CFLAGS for xtensa

Chris Zankel chris at zankel.net
Thu Dec 6 05:36:36 UTC 2012


The longcalls option allows calls across a greater range of addresses.

This option may degrade both code size and performance, but
the linker can generally optimize away the unnecessary overhead
when a call ends up within range

Signed-off-by: Chris Zankel <chris at zankel.net>
---
 package/Makefile.in |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/package/Makefile.in b/package/Makefile.in
index 9fdc745..98e7f7c 100644
--- a/package/Makefile.in
+++ b/package/Makefile.in
@@ -56,6 +56,15 @@ TARGET_ABI+=-mabi=spe -mfloat-gprs=double -Wa,-me500mc
 endif
 endif
 
+# Use longcalls option for Xtensa globally.
+# The 'longcalls' option allows calls across a greater range of addresses,
+# and is required for some packages. While this option can degrade both
+# code size and performance, the linker can usually optimize away the
+# overhead when a call ends up within a certain range.
+ifeq ($(BR2_xtensa),y)
+TARGET_ABI += -mlongcalls
+endif
+
 STAGING_DIR=$(HOST_DIR)/usr/$(GNU_TARGET_NAME)/sysroot
 
 TARGET_OPTIMIZATION:=$(call qstrip,$(BR2_TARGET_OPTIMIZATION))
-- 
1.7.9.5



More information about the buildroot mailing list