update the GNU GCC link script.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1284 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/lm3s/lm3s_rom.ld

@@ -24,6 +24,7 @@ SECTIONS
         *(.rodata*)
         *(.glue_7)
         *(.glue_7t)
+        *(.ARM.extab* .gnu.linkonce.armextab.*)
 
         /* section information for finsh shell */
         . = ALIGN(4);
@@ -36,15 +37,21 @@ SECTIONS
         __vsymtab_end = .;
         . = ALIGN(4);
 
-	. = ALIGN(4);
         _etext = .;
+    } > CODE = 0
+
+    /* .ARM.exidx is sorted, so has to go in its own output section.  */
+    __exidx_start = .;
+    .ARM.exidx :
+    {
+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
 
         /* This is used by the startup in order to initialize the .data secion */
-	_sidata = _etext;
-	} > CODE = 0
+        _sidata = .;
+    } > CODE
+    __exidx_end = .;
 
     /* .data section which is used for initialized data */
-
     .data : AT (_sidata)
     {
         . = ALIGN(4);

bsp/lm3s/rtconfig.py

-
-
 # toolchains options
 ARCH='arm'
 CPU='lm3s'
-CROSS_TOOL 	= 'keil'
+CROSS_TOOL 	= 'gcc'
+
 if  CROSS_TOOL == 'gcc':
 	PLATFORM 	= 'gcc'
 	EXEC_PATH 	= 'E:/Program Files/CodeSourcery/Sourcery G++ Lite/bin'
@@ -25,7 +24,7 @@ if PLATFORM == 'gcc':
     OBJCPY = PREFIX + 'objcopy'
 
     DEVICE = ' -mcpu=cortex-m3 -mthumb'
-    CFLAGS = DEVICE + ' -Dsourcerygxx' 
+    CFLAGS = DEVICE + ' -Dsourcerygxx -ffunction-sections -fdata-sections'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp'
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread-lm3s.map,-cref,-u,Reset_Handler -T lm3s_rom.ld'