[U-Boot-Users] Build failure - multiple definition of `env_get_char'

[Mike Montour <mail@mmontour.net>]

As of:
----
a8409f4f1ac84c36273c1a1e341189662521bcfb is first bad commit
commit a8409f4f1ac84c36273c1a1e341189662521bcfb
Author: Wolfgang Denk <wd@denx.de>
Date:   Wed May 14 12:22:49 2008 +0200

     environment: cleanup prototype declarations of env functions.
----

I am unable to build u-boot. I observed this problem originally when 
building for gta01bv4 with Openmoko-specific patches, but I am able to 
reproduce the problem with a clean checkout of 
git://git.denx.de/u-boot.git configured for "mp2usb" (chosen arbitrarily).

The error messages from the "mp2usb" build failure are below, and I can 
provide more information if needed:

.a drivers/video/libvideo.a common/libcommon.a libfdt/libfdt.a 
api/libapi.a post/libpost.a | \
		sed  -n -e 's/.*\(__u_boot_cmd_.*\)/-u\1/p'|sort|uniq`;\
		cd /home/mmontour/moko/build/u_tmp/u-boot && 
arm-angstrom-linux-gnueabi-ld -Bstatic -T 
/home/mmontour/moko/build/u_tmp/u-boot/board/mp2usb/u-boot.lds  -Ttext 
0x27F00000 $UNDEF_SYM cpu/arm920t/start.o \
			--start-group lib_generic/libgeneric.a cpu/arm920t/libarm920t.a 
cpu/arm920t/at91rm9200/libat91rm9200.a lib_arm/libarm.a 
fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a 
fs/jffs2/libjffs2.a fs/reiserfs/libreiserfs.a fs/ext2/libext2fs.a 
net/libnet.a disk/libdisk.a drivers/bios_emulator/libatibiosemu.a 
drivers/block/libblock.a drivers/dma/libdma.a drivers/hwmon/libhwmon.a 
drivers/i2c/libi2c.a drivers/input/libinput.a drivers/misc/libmisc.a 
drivers/mtd/libmtd.a drivers/mtd/nand/libnand.a 
drivers/mtd/nand_legacy/libnand_legacy.a 
drivers/mtd/onenand/libonenand.a drivers/net/libnet.a 
drivers/net/sk98lin/libsk98lin.a drivers/pci/libpci.a 
drivers/pcmcia/libpcmcia.a drivers/spi/libspi.a drivers/rtc/librtc.a 
drivers/serial/libserial.a drivers/usb/libusb.a drivers/video/libvideo.a 
common/libcommon.a libfdt/libfdt.a api/libapi.a post/libpost.a 
board/mp2usb/libmp2usb.a --end-group -L 
/home/mmontour/moko/build/tmp/cross/lib/gcc/arm-angstrom-linux-gnueabi/4.1.2 
-lgcc \
			-Map u-boot.map -o u-boot
common/libcommon.a(cmd_nvedit.o): In function `envmatch':
/home/mmontour/moko/build/u_tmp/u-boot/common/cmd_nvedit.c:566: multiple 
definition of `env_get_char'
common/libcommon.a(cmd_bootm.o):/home/mmontour/moko/build/u_tmp/u-boot/include/linux/byteorder/swab.h:113: 
first defined here
common/libcommon.a(env_common.o):(.data+0x0): multiple definition of 
`env_get_char'
common/libcommon.a(cmd_bootm.o):/home/mmontour/moko/build/u_tmp/u-boot/include/linux/byteorder/swab.h:113: 
first defined here
common/libcommon.a(env_flash.o): In function `env_get_char_spec':
/home/mmontour/moko/build/u_tmp/u-boot/common/env_flash.c:94: multiple 
definition of `env_get_char'
common/libcommon.a(cmd_bootm.o):/home/mmontour/moko/build/u_tmp/u-boot/include/linux/byteorder/swab.h:113: 
first defined here
make: *** [u-boot] Error 1