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c.f. bug 424647
List Archive: gentoo-embedded
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To: gentoo-embedded@g.o
From: Jakub Zawierucha <teku@...>
Subject: can't resolve symbol '__udivsi3'
Date: Wed, 29 Mar 2006 11:53:12 +0200
Hi,

I need help with unresolved symbol under my embedded Linux:
~ # df
Filesystem           1k-blocks      Used Available Use% Mounted on
df: can't resolve symbol '__udivsi3'
~ # ls /lib
ld-uClibc-0.9.28.so     libm.so.0               librt.so.0
ld-uClibc.so.0          libnsl-0.9.28.so        libthread_db-0.9.28.so
libc.so.0               libnsl.so.0             libthread_db.so.1
libcrypt-0.9.28.so      libpthread-0.9.28.so    libuClibc-0.9.28.so
libcrypt.so.0           libpthread.so.0         libutil-0.9.28.so
libdl-0.9.28.so         libresolv-0.9.28.so     libutil.so.0
libdl.so.0              libresolv.so.0
libm-0.9.28.so          librt-0.9.28.so
~ #


I know, that '__udivsi3' is in libgcc.a (or something like that) but
don't know how to link it in my embedded uclibc. Please give me advise
what should i do.

To build entire environment i use Gentoo tools.

my cross compiler:
UCLIBC_CPU="ARM926T" crossdev -t arm-unknown-linux-uclibc

I use simple script to build sources:

#cat myarm_emerge
#!/bin/sh
export ARCH="arm"
export CHOST="arm-unknown-linux-uclibc"
export CBUILD="i686-pc-linux-gnu"
export ACCEPT_KEYWORDS="arm"
# We use -Os optimization for minimal system size
export CFLAGS="-Os -pipe"
export CXXFLAGS=${CFLAGS}
export ROOT="/opt/arm/rootfs"
export USE="-* make-symlinks savedconfig"
export FEATURES="-distcc"
export CONFIG_PROTECT="-* ${ROOT}/etc"
export UCLIBC_CPU="ARM926T"
emerge $*

./myarm_emerge -av --nodeps vanilla-sources
[here i do *magic things* with my kernel]

./myarm_emerge -av busybox
./myarm_emerge -av baselayout-lite
./myarm_emerge -av sys-libs/uclibc

my uclibc .config is:
#
# Automatically generated make config: don't edit
#
# TARGET_alpha is not set
TARGET_arm=y
# TARGET_bfin is not set
# TARGET_cris is not set
# TARGET_e1 is not set
# TARGET_frv is not set
# TARGET_h8300 is not set
# TARGET_i386 is not set
# TARGET_i960 is not set
# TARGET_m68k is not set
# TARGET_microblaze is not set
# TARGET_mips is not set
# TARGET_nios is not set
# TARGET_nios2 is not set
# TARGET_powerpc is not set
# TARGET_sh is not set
# TARGET_sh64 is not set
# TARGET_sparc is not set
# TARGET_v850 is not set
# TARGET_x86_64 is not set

#
# Target Architecture Features and Options
#
HAVE_ELF=y
ARCH_SUPPORTS_LITTLE_ENDIAN=y
TARGET_ARCH="arm"
ARCH_SUPPORTS_BIG_ENDIAN=y
# CONFIG_GENERIC_ARM is not set
# CONFIG_ARM610 is not set
# CONFIG_ARM710 is not set
# CONFIG_ARM720T is not set
# CONFIG_ARM920T is not set
# CONFIG_ARM922T is not set
CONFIG_ARM926T=y
# CONFIG_ARM1136JF_S is not set
# CONFIG_ARM_SA110 is not set
# CONFIG_ARM_SA1100 is not set
# CONFIG_ARM_XSCALE is not set
ARCH_LITTLE_ENDIAN=y
# ARCH_BIG_ENDIAN is not set
# ARCH_HAS_NO_MMU is not set
ARCH_HAS_MMU=y
UCLIBC_HAS_FLOATS=y
HAS_FPU=y
DO_C99_MATH=y
KERNEL_SOURCE="/usr/arm-unknown-linux-uclibc"
C_SYMBOL_PREFIX=""
HAVE_DOT_CONFIG=y

#
# General Library Settings
#
# HAVE_NO_PIC is not set
DOPIC=y
# HAVE_NO_SHARED is not set
HAVE_SHARED=y
# ARCH_HAS_NO_LDSO is not set
BUILD_UCLIBC_LDSO=y
# FORCE_SHAREABLE_TEXT_SEGMENTS is not set
LDSO_LDD_SUPPORT=y
LDSO_CACHE_SUPPORT=y
# LDSO_PRELOAD_FILE_SUPPORT is not set
LDSO_BASE_FILENAME="ld.so"
LDSO_RUNPATH=y
# DL_FINI_CRT_COMPAT is not set
UCLIBC_CTOR_DTOR=y
# HAS_NO_THREADS is not set
UCLIBC_HAS_THREADS=y
PTHREADS_DEBUG_SUPPORT=y
UCLIBC_HAS_LFS=y
UCLIBC_STATIC_LDCONFIG=y
# MALLOC is not set
# MALLOC_SIMPLE is not set
MALLOC_STANDARD=y
MALLOC_GLIBC_COMPAT=y
UCLIBC_DYNAMIC_ATEXIT=y
HAS_SHADOW=y
UNIX98PTY_ONLY=y
ASSUME_DEVPTS=y
UCLIBC_HAS_TM_EXTENSIONS=y
UCLIBC_HAS_TZ_CACHING=y
UCLIBC_HAS_TZ_FILE=y
# UCLIBC_HAS_TZ_FILE_READ_MANY is not set
UCLIBC_TZ_FILE_PATH="/etc/TZ"

#
# Networking Support
#
# UCLIBC_HAS_IPV6 is not set
UCLIBC_HAS_RPC=y
UCLIBC_HAS_FULL_RPC=y

#
# String and Stdio Support
#
UCLIBC_HAS_STRING_GENERIC_OPT=y
UCLIBC_HAS_STRING_ARCH_OPT=y
UCLIBC_HAS_CTYPE_TABLES=y
UCLIBC_HAS_CTYPE_SIGNED=y
# UCLIBC_HAS_CTYPE_UNSAFE is not set
UCLIBC_HAS_CTYPE_CHECKED=y
# UCLIBC_HAS_CTYPE_ENFORCED is not set
UCLIBC_HAS_WCHAR=y
# UCLIBC_HAS_LOCALE is not set
UCLIBC_HAS_HEXADECIMAL_FLOATS=y
UCLIBC_HAS_GLIBC_CUSTOM_PRINTF=y
UCLIBC_PRINTF_SCANF_POSITIONAL_ARGS=9
# UCLIBC_HAS_SCANF_GLIBC_A_FLAG is not set
# UCLIBC_HAS_STDIO_BUFSIZ_NONE is not set
# UCLIBC_HAS_STDIO_BUFSIZ_256 is not set
# UCLIBC_HAS_STDIO_BUFSIZ_512 is not set
# UCLIBC_HAS_STDIO_BUFSIZ_1024 is not set
# UCLIBC_HAS_STDIO_BUFSIZ_2048 is not set
UCLIBC_HAS_STDIO_BUFSIZ_4096=y
# UCLIBC_HAS_STDIO_BUFSIZ_8192 is not set
UCLIBC_HAS_STDIO_BUILTIN_BUFFER_NONE=y
# UCLIBC_HAS_STDIO_BUILTIN_BUFFER_4 is not set
# UCLIBC_HAS_STDIO_BUILTIN_BUFFER_8 is not set
# UCLIBC_HAS_STDIO_SHUTDOWN_ON_ABORT is not set
UCLIBC_HAS_STDIO_GETC_MACRO=y
UCLIBC_HAS_STDIO_PUTC_MACRO=y
UCLIBC_HAS_STDIO_AUTO_RW_TRANSITION=y
# UCLIBC_HAS_FOPEN_LARGEFILE_MODE is not set
UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE=y
UCLIBC_HAS_GLIBC_CUSTOM_STREAMS=y
UCLIBC_HAS_PRINTF_M_SPEC=y
UCLIBC_HAS_ERRNO_MESSAGES=y
# UCLIBC_HAS_SYS_ERRLIST is not set
UCLIBC_HAS_SIGNUM_MESSAGES=y
# UCLIBC_HAS_SYS_SIGLIST is not set
UCLIBC_HAS_GNU_GETOPT=y

#
# Big and Tall
#
UCLIBC_HAS_REGEX=y
# UCLIBC_HAS_WORDEXP is not set
UCLIBC_HAS_FTW=y
UCLIBC_HAS_GLOB=y

#
# Library Installation Options
#
SHARED_LIB_LOADER_PREFIX="/lib"
RUNTIME_PREFIX="/"
DEVEL_PREFIX="/usr"

#
# uClibc security related options
#
UCLIBC_SECURITY=y
# UCLIBC_BUILD_PIE is not set
UCLIBC_HAS_SSP=y
SSP_QUICK_CANARY=y
# PROPOLICE_BLOCK_ABRT is not set
# PROPOLICE_BLOCK_SEGV is not set
PROPOLICE_BLOCK_KILL=y
# UCLIBC_BUILD_SSP is not set
UCLIBC_BUILD_RELRO=y
# UCLIBC_BUILD_NOW is not set
# UCLIBC_BUILD_NOEXECSTACK is not set

#
# uClibc development/debugging options
#
CROSS_COMPILER_PREFIX="arm-unknown-linux-uclibc-"
# DODEBUG is not set
# DODEBUG_PT is not set
# DOASSERTS is not set
# SUPPORT_LD_DEBUG is not set
# SUPPORT_LD_DEBUG_EARLY is not set
WARNINGS="-Wall"
# UCLIBC_MJN3_ONLY is not set


Jakub Zawierucha

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Updated Jun 17, 2009

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