[U-Boot] [IXP42x PATCH series v4 07/17] use -ffunction-sections / --gc-sections on IXP42x

[Michael Schwingen]

Signed-off-by: Michael Schwingen <michael at schwingen.org>
---
Changes for V2:
 - remove changes from config.mk and board config.h files
 - add wildcards to sections in arch/arm/cpu/ixp/u-boot.lds
Changes for V3:
 - set compiler/linker flags in arch/arm/cpu/ixp/config.mk instead of
   per-board config.mk files
Changes for V4:
 - add changelog

 arch/arm/cpu/ixp/config.mk  |    5 +++++
 arch/arm/cpu/ixp/u-boot.lds |    8 ++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/arch/arm/cpu/ixp/config.mk b/arch/arm/cpu/ixp/config.mk
index deca3f4..5868cba 100644
--- a/arch/arm/cpu/ixp/config.mk
+++ b/arch/arm/cpu/ixp/config.mk
@@ -27,6 +27,11 @@ BIG_ENDIAN = y
 PLATFORM_RELFLAGS += -fno-common -ffixed-r8 -msoft-float -mbig-endian
 
 PLATFORM_CPPFLAGS += -mbig-endian -march=armv5te -mtune=strongarm1100
+
+# -fdata-sections triggers "section .bss overlaps section .rel.dyn" linker error
+PLATFORM_RELFLAGS += -ffunction-sections
+LDFLAGS_u-boot += --gc-sections
+
 # =========================================================================
 #
 # Supply options according to compiler version
diff --git a/arch/arm/cpu/ixp/u-boot.lds b/arch/arm/cpu/ixp/u-boot.lds
index 3587f8a..7199de4 100644
--- a/arch/arm/cpu/ixp/u-boot.lds
+++ b/arch/arm/cpu/ixp/u-boot.lds
@@ -31,8 +31,8 @@ SECTIONS
 	. = ALIGN(4);
 	.text :
 	{
-		arch/arm/cpu/ixp/start.o(.text)
-		*(.text)
+		arch/arm/cpu/ixp/start.o(.text*)
+		*(.text*)
 	}
 
 	. = ALIGN(4);
@@ -40,7 +40,7 @@ SECTIONS
 
 	. = ALIGN(4);
 	.data : {
-		*(.data)
+		*(.data*)
 	}
 
 	. = ALIGN(4);
@@ -67,7 +67,7 @@ SECTIONS
 
 	.bss __rel_dyn_start (OVERLAY) : {
 		__bss_start = .;
-		*(.bss)
+		*(.bss*)
 		 . = ALIGN(4);
 		__bss_end__ = .;
 	}
-- 
1.7.2.5