Hi

yes. I have cpmpared this. but I can't find where is the problem.
attachment is the u-boot.map diff.

after remove those 'extern' the u-boot-nand-spl is exact same. binary file. map 
file both same.
but the u-boot.bin/map changed.

Please help me take a look.

thanks Scott.
xiangfu

On 01/05/2012 06:12 AM, Scott Wood wrote:
Or compare the resulting binaries, see what's actually changed.

-Scott

--- YES/u-boot.map	2012-01-01 20:41:57.020058001 +0800
+++ NO/u-boot.map	2012-01-01 20:41:13.068058002 +0800
@@ -1058,7 +1058,7 @@
                 0x0000000080118b20                __ashrdi3
                 0x0000000080118b60                . = ALIGN (0x4)
 
-.rodata         0x0000000080118b60     0x5550
+.rodata         0x0000000080118b60     0x5558
  *(SORT(.rodata*))
  .rodata        0x0000000080118b60       0xd0 common/libcommon.o
  .rodata        0x0000000080118c30       0x20 lib/libgeneric.o
@@ -1157,102 +1157,102 @@
  .rodata.tab_seq
                 0x000000008011e04c        0xc common/libcommon.o
  .rodata.version_string
-                0x000000008011e058       0x38 common/libcommon.o
+                0x000000008011e058       0x40 common/libcommon.o
                 0x000000008011e058                version_string
  .rodata.xyzModem_error
-                0x000000008011e090       0x20 common/libcommon.o
+                0x000000008011e098       0x20 common/libcommon.o
 
-.rel.dyn        0x000000008011e0b0        0x0
+.rel.dyn        0x000000008011e0b8        0x0
  .rel.dyn       0x0000000000000000        0x0 arch/mips/cpu/xburst/start.o
-                0x000000008011e0b0                . = ALIGN (0x4)
+                0x000000008011e0b8                . = ALIGN (0x4)
 
-.data           0x000000008011e0b0     0x1978
+.data           0x000000008011e0b8     0x1978
  *(.data*)
- .data.uart     0x000000008011e0b0        0x4 arch/mips/cpu/xburst/libxburst.o
-                0x000000008011e0b0                uart
+ .data.uart     0x000000008011e0b8        0x4 arch/mips/cpu/xburst/libxburst.o
+                0x000000008011e0b8                uart
  .data.rel.init_sequence
-                0x000000008011e0b4       0x28 arch/mips/lib/libmips.o
-                0x000000008011e0b4                init_sequence
+                0x000000008011e0bc       0x28 arch/mips/lib/libmips.o
+                0x000000008011e0bc                init_sequence
  .data.rel.boot_os
-                0x000000008011e0dc       0x4c common/libcommon.o
+                0x000000008011e0e4       0x4c common/libcommon.o
  .data.rel.local.cmd_bootm_sub
-                0x000000008011e128       0x90 common/libcommon.o
- .data.do_echo  0x000000008011e1b8        0x4 common/libcommon.o
+                0x000000008011e130       0x90 common/libcommon.o
+ .data.do_echo  0x000000008011e1c0        0x4 common/libcommon.o
  .data.dp_last_length
-                0x000000008011e1bc        0x4 common/libcommon.o
+                0x000000008011e1c4        0x4 common/libcommon.o
  .data.load_addr
-                0x000000008011e1c0        0x4 common/libcommon.o
-                0x000000008011e1c0                load_addr
+                0x000000008011e1c8        0x4 common/libcommon.o
+                0x000000008011e1c8                load_addr
  .data.rel.cmd_env_sub
-                0x000000008011e1c4       0xc0 common/libcommon.o
- .data.env_id   0x000000008011e284        0x4 common/libcommon.o
+                0x000000008011e1cc       0xc0 common/libcommon.o
+ .data.env_id   0x000000008011e28c        0x4 common/libcommon.o
  .data.trim_threshold
-                0x000000008011e288        0x4 common/libcommon.o
+                0x000000008011e290        0x4 common/libcommon.o
  .data.rel.local.av_
-                0x000000008011e28c      0x408 common/libcommon.o
+                0x000000008011e294      0x408 common/libcommon.o
  .data.sbrk_base
-                0x000000008011e694        0x4 common/libcommon.o
+                0x000000008011e69c        0x4 common/libcommon.o
  .data.rel.local.env_name_spec
-                0x000000008011e698        0x4 common/libcommon.o
-                0x000000008011e698                env_name_spec
+                0x000000008011e6a0        0x4 common/libcommon.o
+                0x000000008011e6a0                env_name_spec
  .data.rel.ro.local.uimage_comp
-                0x000000008011e69c       0x48 common/libcommon.o
+                0x000000008011e6a4       0x48 common/libcommon.o
  .data.rel.ro.local.uimage_type
-                0x000000008011e6e4       0xc0 common/libcommon.o
+                0x000000008011e6ec       0xc0 common/libcommon.o
  .data.rel.ro.local.uimage_arch
-                0x000000008011e7a4       0xf0 common/libcommon.o
+                0x000000008011e7ac       0xf0 common/libcommon.o
  .data.rel.ro.local.uimage_os
-                0x000000008011e894       0x54 common/libcommon.o
+                0x000000008011e89c       0x54 common/libcommon.o
  .data.rel.local.stdio_names
-                0x000000008011e8e8        0xc common/libcommon.o
-                0x000000008011e8e8                stdio_names
+                0x000000008011e8f0        0xc common/libcommon.o
+                0x000000008011e8f0                stdio_names
  .data.nand_curr_device
-                0x000000008011e8f4        0x4 drivers/mtd/nand/libnand.o
-                0x000000008011e8f4                nand_curr_device
+                0x000000008011e8fc        0x4 drivers/mtd/nand/libnand.o
+                0x000000008011e8fc                nand_curr_device
  .data.rel.local.bbt_main_descr
-                0x000000008011e8f8       0x24 drivers/mtd/nand/libnand.o
+                0x000000008011e900       0x24 drivers/mtd/nand/libnand.o
  .data.rel.local.bbt_mirror_descr
-                0x000000008011e91c       0x24 drivers/mtd/nand/libnand.o
+                0x000000008011e924       0x24 drivers/mtd/nand/libnand.o
  .data.rel.local.agand_flashbased
-                0x000000008011e940       0x24 drivers/mtd/nand/libnand.o
+                0x000000008011e948       0x24 drivers/mtd/nand/libnand.o
  .data.rel.local.largepage_flashbased
-                0x000000008011e964       0x24 drivers/mtd/nand/libnand.o
+                0x000000008011e96c       0x24 drivers/mtd/nand/libnand.o
  .data.rel.local.smallpage_flashbased
-                0x000000008011e988       0x24 drivers/mtd/nand/libnand.o
+                0x000000008011e990       0x24 drivers/mtd/nand/libnand.o
  .data.rel.local.largepage_memorybased
-                0x000000008011e9ac       0x24 drivers/mtd/nand/libnand.o
+                0x000000008011e9b4       0x24 drivers/mtd/nand/libnand.o
  .data.rel.local.smallpage_memorybased
-                0x000000008011e9d0       0x24 drivers/mtd/nand/libnand.o
+                0x000000008011e9d8       0x24 drivers/mtd/nand/libnand.o
  .data.bbt_pattern
-                0x000000008011e9f4        0x4 drivers/mtd/nand/libnand.o
+                0x000000008011e9fc        0x4 drivers/mtd/nand/libnand.o
  .data.mirror_pattern
-                0x000000008011e9f8        0x4 drivers/mtd/nand/libnand.o
+                0x000000008011ea00        0x4 drivers/mtd/nand/libnand.o
  .data.scan_agand_pattern
-                0x000000008011e9fc        0x8 drivers/mtd/nand/libnand.o
+                0x000000008011ea04        0x8 drivers/mtd/nand/libnand.o
  .data.scan_ff_pattern
-                0x000000008011ea04        0x4 drivers/mtd/nand/libnand.o
+                0x000000008011ea0c        0x4 drivers/mtd/nand/libnand.o
  .data.rel.ro.local.nand_flash_ids
-                0x000000008011ea08      0x468 drivers/mtd/nand/libnand.o
-                0x000000008011ea08                nand_flash_ids
+                0x000000008011ea10      0x468 drivers/mtd/nand/libnand.o
+                0x000000008011ea10                nand_flash_ids
  .data.rel.ro.local.nand_manuf_ids
-                0x000000008011ee70       0x50 drivers/mtd/nand/libnand.o
-                0x000000008011ee70                nand_manuf_ids
+                0x000000008011ee78       0x50 drivers/mtd/nand/libnand.o
+                0x000000008011ee78                nand_manuf_ids
  .data.nand_oob_8
-                0x000000008011eec0      0x248 drivers/mtd/nand/libnand.o
+                0x000000008011eec8      0x248 drivers/mtd/nand/libnand.o
  .data.nand_oob_16
-                0x000000008011f108      0x248 drivers/mtd/nand/libnand.o
+                0x000000008011f110      0x248 drivers/mtd/nand/libnand.o
  .data.nand_oob_64
-                0x000000008011f350      0x248 drivers/mtd/nand/libnand.o
+                0x000000008011f358      0x248 drivers/mtd/nand/libnand.o
  .data.nand_oob_128
-                0x000000008011f598      0x248 drivers/mtd/nand/libnand.o
+                0x000000008011f5a0      0x248 drivers/mtd/nand/libnand.o
  .data.qi_lb60_ecclayout_2gb
-                0x000000008011f7e0      0x248 drivers/mtd/nand/libnand.o
+                0x000000008011f7e8      0x248 drivers/mtd/nand/libnand.o
 
-.got.plt        0x000000008011fa28        0x0
+.got.plt        0x000000008011fa30        0x0
  .got.plt       0x0000000000000000        0x0 arch/mips/cpu/xburst/start.o
-                0x000000008011fa28                . = .
+                0x000000008011fa30                . = .
                 0x0000000080127a20                _gp = (ALIGN (0x10) + 0x7ff0)
-                0x000000008011fa28                __got_start = .
+                0x000000008011fa30                __got_start = .
 
 .got            0x000000008011fa30      0x3f8
  *(.got)
@@ -1301,7 +1301,7 @@
                 0x0000000080120110                __u_boot_cmd_version
                 0x0000000080120128                __u_boot_cmd_end = .
                 0x0000000080120128                uboot_end_data = .
-                0x0000000000000100                num_got_entries = ((__got_end - __got_start) >> 0x2)
+                0x00000000000000fe                num_got_entries = ((__got_end - __got_start) >> 0x2)
                 0x0000000080120128                . = ALIGN (0x4)
 
 .sbss
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