From dda0896d875ec2d33b6de94df818a2f94526272b Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Sat, 30 Jul 2011 00:34:59 +0200
Subject: use gcc/ld flags -ffunction-sections and --gc-sections

This will discard unused functions from the resulting binary
---
 firmware/Makefile                             |  4 ++--
 firmware/link/AT91SAM7S128-ROM-sam7dfu-app.ld | 10 +++++-----
 firmware/link/AT91SAM7S256-ROM-sam7dfu-app.ld | 10 +++++-----
 firmware/link/AT91SAM7S64-ROM-sam7dfu-app.ld  | 10 +++++-----
 4 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/firmware/Makefile b/firmware/Makefile
index 9a95d44..b085c33 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -249,7 +249,7 @@ CFLAGS += -Wredundant-decls -Wreturn-type -Wshadow
 CFLAGS += -Wbad-function-cast -Wsign-compare -Waggregate-return 
 CFLAGS += -Wa,-adhlns=$(subst $(suffix $<),.lst,$<) 
 CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
-#CFLAGS += -ffunction-sections -fdata-sections       
+CFLAGS += -ffunction-sections -fdata-sections
 
 # flags only for C
 CONLYFLAGS += -Wnested-externs 
@@ -315,7 +315,7 @@ LDFLAGS += -lc -lgcc
 LDFLAGS += $(CPLUSPLUS_LIB)
 LDFLAGS += $(patsubst %,-L%,$(EXTRA_LIBDIRS))
 LDFLAGS += $(patsubst %,-l%,$(EXTRA_LIBS))
-#LDFLAGS += --gc-sections
+LDFLAGS += -Wl,--gc-sections -Wl,--entry=_startup
 
 # Set Linker-Script Depending On Selected Memory and Controller
 ifeq ($(RUN_MODE),RUN_FROM_RAM)
diff --git a/firmware/link/AT91SAM7S128-ROM-sam7dfu-app.ld b/firmware/link/AT91SAM7S128-ROM-sam7dfu-app.ld
index ebac6d4..7db540e 100644
--- a/firmware/link/AT91SAM7S128-ROM-sam7dfu-app.ld
+++ b/firmware/link/AT91SAM7S128-ROM-sam7dfu-app.ld
@@ -16,8 +16,8 @@ SECTIONS
 	. = 0x00000000;
 	/* first section is .text which is used for code */
 	.text 0x00104000: AT ( 0x00000000 ) { 
-  		src/start/Cstartup_app.o (.text)
-		* (.text)
+  		src/start/Cstartup_app.o (.text*)
+		* (.text*)
 		* (.rodata*)
   		. = ALIGN(4);
   	} >FLASH
@@ -28,8 +28,8 @@ SECTIONS
 	/* 0x00200000 ... */
 	.data 0x00200028: AT ( ADDR(.text) + SIZEOF(.text) - ADDR(.text) ) {
   		_data = . ;
-		* (.fastrun)
-  		* (.data)
+		* (.fastrun*)
+  		* (.data*)
   		. = ALIGN(4);
   	} >DATA
 
@@ -40,7 +40,7 @@ SECTIONS
 	.bss : {
 		__bss_start = . ;
 		__bss_start__ = . ;
-		*(.bss)
+		*(.bss*)
 		*(COMMON)
 	} >DATA
 
diff --git a/firmware/link/AT91SAM7S256-ROM-sam7dfu-app.ld b/firmware/link/AT91SAM7S256-ROM-sam7dfu-app.ld
index 85bf7b8..7ec2089 100644
--- a/firmware/link/AT91SAM7S256-ROM-sam7dfu-app.ld
+++ b/firmware/link/AT91SAM7S256-ROM-sam7dfu-app.ld
@@ -16,8 +16,8 @@ SECTIONS
 	. = 0x00000000;
 	/* first section is .text which is used for code */
 	.text 0x00104000: AT ( 0x00000000 ) { 
-  		src/start/Cstartup_app.o (.text)
-		* (.text)
+  		src/start/Cstartup_app.o (.text*)
+		* (.text*)
 		* (.rodata*)
   		. = ALIGN(4);
   	} >FLASH
@@ -28,8 +28,8 @@ SECTIONS
 	/* 0x00200000 ... */
 	.data 0x00200028: AT ( ADDR(.text) + SIZEOF(.text) - ADDR(.text) ) {
   		_data = . ;
-		* (.fastrun)
-  		* (.data)
+		* (.fastrun*)
+  		* (.data*)
   		. = ALIGN(4);
   	} >DATA
 
@@ -40,7 +40,7 @@ SECTIONS
 	.bss : {
 		__bss_start = . ;
 		__bss_start__ = . ;
-		*(.bss)
+		*(.bss*)
 		*(COMMON)
 	} >DATA
 
diff --git a/firmware/link/AT91SAM7S64-ROM-sam7dfu-app.ld b/firmware/link/AT91SAM7S64-ROM-sam7dfu-app.ld
index de24dd8..d45f691 100644
--- a/firmware/link/AT91SAM7S64-ROM-sam7dfu-app.ld
+++ b/firmware/link/AT91SAM7S64-ROM-sam7dfu-app.ld
@@ -16,8 +16,8 @@ SECTIONS
 	. = 0x00000000;
 	/* first section is .text which is used for code */
 	.text 0x00104000: AT ( 0x00000000 ) { 
-  		src/start/Cstartup_app.o (.text)
-		* (.text)
+  		src/start/Cstartup_app.o (.text*)
+		* (.text*)
 		* (.rodata*)
   		. = ALIGN(4);
   	} >FLASH
@@ -28,8 +28,8 @@ SECTIONS
 	/* 0x00200000 ... */
 	.data 0x00200028: AT ( ADDR(.text) + SIZEOF(.text) - ADDR(.text) ) {
   		_data = . ;
-		* (.fastrun)
-  		* (.data)
+		* (.fastrun*)
+  		* (.data*)
   		. = ALIGN(4);
   	} >DATA
 
@@ -40,7 +40,7 @@ SECTIONS
 	.bss : {
 		__bss_start = . ;
 		__bss_start__ = . ;
-		*(.bss)
+		*(.bss*)
 		*(COMMON)
 	} >DATA
 
-- 
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