commit 3b5b6ac3e818cd697f8c8f3318feb590520c6fd1
author Thomas Chou <thomas@wytron.com.tw> Fri May 28 12:08:10 2010 +0800
committer Scott McNutt <smcnutt@psyent.com> Mon Jul 12 11:30:51 2010 -0400
tree 0bf401bd30feb85d871398395ed1e00a6e8b9745
parent 6262d021d2a0f6fe9bef2bc5ebeb761e5a9469fc

nios2: use gc sections to reduce image size

Follow the discussion of Charles Manning and Mike Frysinger.
Using gc_sections helps reduce image size.

Configuring for nios2-generic board...
Before,
   text    data     bss     dec     hex filename
 123979    3724   22892  150595   24c43 /tmp/u-boot/u-boot
After,
   text    data     bss     dec     hex filename
 115983    3800   22732  142515   22cb3 /tmp/u-boot/u-boot

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>

arch/nios2/config.mk

diff --git a/arch/nios2/config.mk b/arch/nios2/config.mk
index 793cc43..aba96b3 100644
--- a/arch/nios2/config.mk
+++ b/arch/nios2/config.mk
@@ -30,3 +30,6 @@
 PLATFORM_CPPFLAGS += -G0
 
 LDSCRIPT ?= $(SRCTREE)/$(CPUDIR)/u-boot.lds
+
+LDFLAGS += --gc-sections
+PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections