We have been using an embedded glibc toolchain for sometime. I recently bootstrapped an toolchain using uClibc (gcc-4.2.4, binutils-2.18, uClibc-0.29). The target is a broadcom chip which has a mips core it is strapped little-endian (mipsel).

All the libs are in /lib include the important ld-xxx

[root@2WireBlockBuster /lib]# ls
ld-uClibc-0.9.29.so libexpat.so librt.so
ld-uClibc.so.0 libexpat.so.0 librt.so.0
libc.so.0 libexpat.so.0.5.0 libsqlite3.so
libcrypt-0.9.29.so libgcc_s.so libssl.so
libcrypt.so libgcc_s.so.1 libssl.so.0.9.8
libcrypt.so.0 libiw.so libstdc++.so
libcrypto.so libiw.so.28 libstdc++.so.6
libcrypto.so.0.9.8 libm-0.9.29.so libstdc++.so.6.0.9
libcurl.so libm.so.0 libthread_db-0.9.29.so
libcurl.so.4 libmpg123.so libthread_db.so
libcurl.so.4.0.1 libpthread-0.9.29.so libthread_db.so.1
libdaemon.so libpthread.so libuClibc-0.9.29.so
libdaemon.so.0 libpthread.so.0 libutil-0.9.29.so
libdaemon.so.0.4.0 libresolv-0.9.29.so libutil.so
libdl-0.9.29.so libresolv.so libutil.so.0
libdl.so libresolv.so.0 modules
libdl.so.0 librt-0.9.29.so

I can link and run static executables, but when I try to run a dynamically linked executable I get:

[root@2WireBlockBuster /bin]# ./mount
-sh: ./mount: not found

This happens to any dynamically linked executable

By running a statically linked ldd shows that the .so(es) are where they are supposed to be:

[root@2WireBlockBuster /bin]# ./ldd mount
checking sub-depends for '/lib/libc.so.0'
ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x2aaa8000)
libc.so.0 => /lib/libc.so.0 (0x00000000)
/lib/ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x00000000)

Has anyone had this problem. Did I miss a step? I've pasted the makefile used to build the toolchain below?

Thanks,

Jackson

USE_UCLIBC=1
TOP=./..
include $(TOP)/build/cfg/top.mk
BUILD_DIR = $(BASE_BUILD_DIR)
#TOOLCHAIN_KERNEL=linux-2.6.18-brcm-5.0
TOOLCHAIN_KERNEL=linux-2.6.18-brcm-6.2
KERNEL_ARCH=mips
PARALLLELMFLAGS?=-j4

toolchain: kernel-headers uClibc-headers binutils gcc-bootstrap uClibc-bootstrap gcc-full uClibc gettext pkg-config \
remove-la_files install-intltool install-gtkdoc squashfs mkappimage mkappimagebb stripkernel

kernel-headers: config-kernel-headers copy-kernel-headers

uClibc-headers: config-uClibc-headers install-uClibc-headers

binutils: config-binutils build-binutils install-binutils

gcc-bootstrap: config-gcc-bootstrap build-gcc-bootstrap install-gcc-bootstrap

uClibc-bootstrap: config-uClibc-bootstrap build-uClibc-bootstrap install-uClibc-bootstrap

gcc-full: config-gcc-full build-gcc-full install-gcc-full

uClibc: config-uClibc build-uClibc install-uClibc

pkg-config: config-pkg-config build-pkg-config install-pkg-config

gdb: config-gdb build-gdb install-gdb

gettext: config-gettext build-gettext install-gettext

gdbnative: config-gdbnative build-gdbnative install-gdbnative

gdbserver: config-gdbserver build-gdbserver install-gdbserver

squashfs: build-squashfs install-squashfs

mkappimage: build-mkappimage install-mkappimage

mkappimagebb: build-mkappimagebb install-mkappimagebb

stripkernel: build-stripkernel install-stripkernel


##################################################################################
# 1. Set up kernel headers, now using the headers_check with ARCH.
#
config-kernel-headers:
$(MAKE) -C $(TOP)/kernel config-kernel

copy-kernel-headers:
rm -rf $(PREFIX)
mkdir -p $(SYSROOT)
mkdir -p $(HEADER_DIR)
rm -rf $(HEADER_DIR)/linux
rm -rf $(HEADER_DIR)/asm
rm -rf $(HEADER_DIR)/asm-generic
cd $(KERNEL_DIR) && \
cp -r include/linux $(HEADER_DIR) && \
cp -r include/asm-$(KARCH) $(HEADER_DIR)/asm && \
cp -r include/asm-generic $(HEADER_DIR)/asm-generic

# RJJ this method is broken in this kernel. Maybe 2.6.18-brcm-5.1? I doubt it
#config-kernel-headers:
# cd $(TOP)/kernel/$(TOOLCHAIN_KERNEL) && \
# make mrproper && \
# make ARCH=$(KERNEL_ARCH) headers_check
#
#copy-kernel-headers:
# rm -rf $(PREFIX)
# mkdir -p $(SYSROOT)
# cd $(TOP)/kernel/$(TOOLCHAIN_KERNEL) && \
# make ARCH=$(KERNEL_ARCH) INSTALL_HDR_PATH=$(SYSROOT) headers_install
# cp $(TOP)/kernel/$(TOOLCHAIN_KERNEL)/arch/mips/include/asm/asm.h $(SYSROOT)/include/asm/
# cp $(TOP)/kernel/$(TOOLCHAIN_KERNEL)/arch/mips/include/asm/regdef.h $(SYSROOT)/include/asm/
#
#
##################################################################################


##################################################################################
# 2. Build Inital headers for bootstrap compiler)
#
config-uClibc-headers:
@echo "Configuring uClibc-headers"
rm -rf $(BUILD_DIR)/uClibc-headers
mkdir -p $(BUILD_DIR)
cp -a $(UCLIBC_DIR) $(BUILD_DIR)
mv $(BUILD_DIR)/$(UCLIBC_VER) $(BUILD_DIR)/uClibc-headers
chmod +w -R $(BUILD_DIR)/uClibc-headers

install-uClibc-headers:
@echo "Installing uClibc-headers"
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/uClibc-headers && \
make PREFIX=$(SYSROOT) install_headers
#
#
##################################################################################

##################################################################################
# 2. build binutils (as, ar, ld, ranlib, nm, etc)
#
config-binutils:
@echo "Configuring binutils"
rm -rf $(BUILD_DIR)/binutils
mkdir -p $(BUILD_DIR)/binutils
AR=$(CROSS_COMPILE)ar AS=$(CROSS_COMPILE)as \
cd $(BUILD_DIR)/binutils && \
$(BINUTILS_DIR)/configure \
--prefix=$(PREFIX) \
--build=$(HOST) \
--host=$(HOST) \
--target=$(TARGET) \
--with-sysroot=$(PREFIX) \
--with-lib-path=$(SYSROOT)/lib \
--enable-shared \
--enable-multilib \
--disable-werror
# cp -a $(BINUTILS_DIR)/* $(BUILD_DIR)/binutils


build-binutils:
@echo "Building binutils"
cd $(BUILD_DIR)/binutils && \
make -j4

install-binutils:
@echo "Installing binutils"
cd $(BUILD_DIR)/binutils && \
make install
#
#
##################################################################################


##################################################################################
# 3. build bootstrap gcc (used to compile glibc bootstrap)
#
config-gcc-bootstrap:
echo "Configuring gcc bootstrap compiler"
rm -rf $(BUILD_DIR)/gcc-bootstrap
mkdir -p $(BUILD_DIR)/gcc-bootstrap
PATH="$(PATH)"; export PATH; \
cd $(BUILD_DIR)/gcc-bootstrap && \
$(GCC_DIR)/configure \
--prefix=$(PREFIX) \
--build=$(HOST) \
--host=$(HOST) \
--target=$(TARGET) \
--with-sysroot=$(SYSROOT) \
--disable-__cxa_atexit \
--with-gnu-ld \
--with-gnu-as \
--disable-shared \
--disable-libssp \
--disable-libmudflap \
--disable-libgomp \
--enable-threads \
--disable-multilib \
--disable-nls \
--enable-c99 \
--enable-long-long \
--with-abi=32 \
--with-tune-mips1 \
--enable-languages=c

build-gcc-bootstrap:
echo "Building gcc bootstrap compiler"
PATH="$(PATH)"; export PATH; \
cd $(BUILD_DIR)/gcc-bootstrap && \
make all-gcc -j4

install-gcc-bootstrap:
echo "Installing gcc bootstrap compiler"
mkdir -p $(BUILD_DIR)/gcc-bootstrap/$(TARGET)/libiberty
echo "install:" > $(BUILD_DIR)/gcc-bootstrap/$(TARGET)/libiberty/Makefile
PATH="$(PATH)"; export PATH; \
cd $(BUILD_DIR)/gcc-bootstrap && \
make install
#
#
##################################################################################


##################################################################################
# 4. Build uClibc bootstrap (may not need to do a full)
#
config-uClibc-bootstrap:
@echo "Configuring uClibc-bootstrap"
rm -rf $(BUILD_DIR)/uClibc-bootstrap
cp -a $(UCLIBC_DIR) $(BUILD_DIR)
mv $(BUILD_DIR)/$(UCLIBC_VER) $(BUILD_DIR)/uClibc-bootstrap
chmod +w -R $(BUILD_DIR)/uClibc-bootstrap

build-uClibc-bootstrap:
@echo "Building uClibc-bootstrap"
PATH="$(PATH):$(PREFIX)/bin"; export PATH; export SYSROOT; \
cd $(BUILD_DIR)/uClibc-bootstrap && \
make -j1

install-uClibc-bootstrap:
@echo "Installing uClibc-bootstrap"
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/uClibc-bootstrap && \
make PREFIX=$(SYSROOT) install
#
#
##################################################################################


##################################################################################
# 5. Build full gcc now that glibc has been built. This is a non-static version
# of gcci (unlike the bootstrap), g++, gcj, libgcj and classpath.
#
config-gcc-full:
@echo "Configuring gcc full"
rm -rf $(BUILD_DIR)/gcc
mkdir -p $(BUILD_DIR)/gcc
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/gcc && \
LDFLAGS="-Wl,-rpath,$(SYSROOT)/lib" \
$(GCC_DIR)/configure \
--prefix=$(PREFIX) \
--build=$(HOST) \
--host=$(HOST) \
--target=$(TARGET) \
--with-sysroot=$(SYSROOT) \
--disable-__cxa_atexit \
--with-gnu-ld \
--with-gnu-as \
--enable-shared \
--enable-threads-posix \
--disable-multilib \
--with-abi=32 \
--with-tune=mips1 \
--enable-languages=c,c++,java \
--enable-c99 \
--enable-long-long \
--disable-libmudflap \
--disable-libssp \
--disable-libgomp \
--disable-nls \
--without-x \
--disable-jvmpi \
--disable-java-awt \
--disable-java-swing \
--disable-interpreter

build-gcc-full:
@echo "Building gcc full"
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/gcc && \
make AS_FOR_TARGET=$(CROSS_COMPILE)as \
LD_FOR_TARGET=$(CROSS_COMPILE)ld -j4

install-gcc-full:
@echo "Installing gcc full"
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/gcc && \
make install -j1
#
#
##################################################################################


##################################################################################
# 6. Build Full uClibc, actually same except with full gcc compiler
#
config-uClibc:
@echo "Configuring uClibc"
rm -rf $(BUILD_DIR)/uClibc
cp -a $(UCLIBC_DIR) $(BUILD_DIR)
mv $(BUILD_DIR)/$(UCLIBC_VER) $(BUILD_DIR)/uClibc
chmod +w -R $(BUILD_DIR)/uClibc

build-uClibc:
@echo "Building uClibc"
PATH="$(PATH):$(PREFIX)/bin"; export PATH; export SYSROOT; \
cd $(BUILD_DIR)/uClibc && \
make -j1
cd $(BUILD_DIR)/uClibc/utils && \
make -j1

install-uClibc:
@echo "Installing uClibc"
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/uClibc && \
make PREFIX=$(PREFIX) install
mkdir -p $(SYSROOT)/sbin
cp $(BUILD_DIR)/uClibc/utils/ldconfig $(SYSROOT)/sbin
cp $(BUILD_DIR)/uClibc/utils/iconv $(SYSROOT)/bin
cp $(BUILD_DIR)/uClibc/utils/ldd $(SYSROOT)/bin
cp $(BUILD_DIR)/uClibc/utils/readelf $(SYSROOT)/bin
#
#
##################################################################################

config-gettext:
@echo "Configuring gettext"
rm -rf $(BUILD_DIR)/gettext
mkdir -p $(BUILD_DIR)/gettext
chmod +w $(GETTEXT_DIR)/configure
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/gettext \
AR=$(CROSS_COMPILE)ar AS=$(CROSS_COMPILE)as && \
$(GETTEXT_DIR)/configure \
--prefix=$(SYSROOT) \
--target=$(TARGET) \
--host=$(TARGET) \
--disable-libasprintf \
--enable-shared \
--disable-openmp \
--disable-rpath \
--enable-relocatable \
--without-libintl-prefix \
--with-included-gettext \
--without-libpth-prefix

build-gettext:
@echo "Building gettext"
cd $(BUILD_DIR)/gettext && \
make -j4

install-gettext:
@echo "Installing gettext"
cd $(BUILD_DIR)/gettext && \
make install
chmod -w $(GETTEXT_DIR)/configure

config-pkg-config:
@echo "Configuring pkg-config"
rm -rf $(BUILD_DIR)/pkg-config
mkdir -p $(BUILD_DIR)/pkg-config
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/pkg-config \
AR=ar AS=as && \
$(PKG-CONFIG_DIR)/configure \
--prefix=$(PREFIX) \
--target=$(HOST) \
--host=$(HOST)

build-pkg-config:
@echo "Building pkg-config"
cd $(BUILD_DIR)/pkg-config && \
make -j4

install-pkg-config:
@echo "Installing pkg-config"
cd $(BUILD_DIR)/pkg-config && \
make install

install-intltool:
cp $(INTLTOOL_DIR)/* $(PREFIX)/bin

install-gtkdoc:
cp $(GTKDOC_DIR)/* $(PREFIX)/bin

install-automake:
cp $(AUTOMAKE_DIR)/* $(PREFIX)/bin

install-autoconf:
cp $(AUTOCONF_DIR)/* $(PREFIX)/bin

install-aclocal:

remove-la_files:
@echo "Removing .la files from libs"
rm $(SYSROOT)/lib/*.la

##################################################################################
# 7. Build the debugger
#
ifeq ($(ARCH),pcdev)
EXTRA_GDB_OPTS=--program-prefix=$(CROSS_COMPILE)
endif

config-gdb:
@echo "Configuring gdb"
rm -rf $(BUILD_DIR)/gdb
mkdir -p $(BUILD_DIR)/gdb
PATH="$(PATH)"; export PATH; \
cd $(BUILD_DIR)/gdb && \
$(GDB_DIR)/configure \
--prefix=$(PREFIX) \
--target=$(TARGET) \
--program-prefix=$(CROSS_COMPILE)

build-gdb:
@echo "Building gdb"
PATH="$(PATH)"; export PATH; \
cd $(BUILD_DIR)/gdb && \
make

install-gdb:
@echo "Installing gdb"
PATH="$(PATH)"; export PATH; \
cd $(BUILD_DIR)/gdb && \
make install
#
#
##################################################################################


##################################################################################
# 8. This is for building a MIPS NATIVE version of the debugger can only be build
# AFTER libs dir is built (for ncurses) could even put this in "utils"
# makefile... This runs too slow on Mediaportal/Mediapoint to be pratical
#
config-gdbnative:
@echo "Configuring gdb native"
rm -rf $(BUILD_DIR)/gdbnative
mkdir -p $(BUILD_DIR)/gdbnative
PATH="$(PATH)"; export PATH; \
export bash_cv_have_mbstate_t=yes; \
export LDFLAGS="-L$(ULIB_DIR)/lib"; \
export CFLAGS="-I$(ULIB_DIR)/include"; \
cd $(BUILD_DIR)/gdbnative && \
$(GDB_DIR)/configure \
--prefix=$(ULIB_DIR) \
--host=$(TARGET) \
--target=$(TARGET) \
--build=$(HOST)

build-gdbnative:
@echo "Building gdb native"
PATH="$(PATH)"; export PATH; \
export bash_cv_have_mbstate_t=yes; \
export CPPFLAGS="-I$(ULIB_DIR)/include"; \
cd $(BUILD_DIR)/gdbnative && \
make LDFLAGS="-L$(ULIB_DIR)/lib" \
CFLAGS="-I$(ULIB_DIR)/include"

install-gdbnative:

# @echo "Installing gdb native"
# PATH="$(PATH)"; export PATH; \
# cd $(BUILD_DIR)/gdbnative && \
# make install
#
#
##################################################################################





##################################################################################
# 9. gdbserver is a debug stub that runs on target machine. This does not work
# so well, but is slowly getting better as mips support in glibc gets better.
# I don't know about uClibc.
#
config-gdbserver:
@echo "Configuring gdbserver"
rm -rf $(BUILD_DIR)/gdbserver
mkdir -p $(BUILD_DIR)/gdbserver
PATH="$(PATH):$(PREFIX)/bin"; export PATH; \
cd $(BUILD_DIR)/gdbserver && \
CC=$(CROSS_COMPILE)gcc \
LD_FOR_TARGET=$(CROSS_COMPILE)ld \
$(GDB_DIR)/gdb/gdbserver/configure \
--prefix=$(SYSROOT)/bin \
--host=$(TARGET) \
--target=$(TARGET) \
--with-sysroot=$(SYSROOT)

build-gdbserver:
@echo "Building gdbserver"
PATH="$(PATH)"; export PATH; \
cd $(BUILD_DIR)/gdbserver && \
make

# make LDFLAGS=-static

install-gdbserver:
@echo "Installing gdbserver"
PATH="$(PATH)"; export PATH; \
cd $(BUILD_DIR)/gdbserver && \
make install
#
#
##################################################################################


build-squashfs:
@echo "Building squashfs"
$(MAKE) -C $(SQUASHFS_DIR)

install-squashfs:
@echo "Installing squashfs"
$(MAKE) -C $(SQUASHFS_DIR) install

build-mkappimage:
@echo "Building mkappimage"
$(MAKE) -C mkappimage

build-mkappimagebb:
@echo "Building mkappimagebb"
cd mkappimage && \
$(MAKE) -f Makefilebb

install-mkappimage:
@echo "Installing mkappimage"
$(MAKE) -C mkappimage install

install-mkappimagebb:
@echo "Installing mkappimage"
cd mkappimage && \
$(MAKE) -f Makefilebb install

build-stripkernel:
@echo "Building stripkernel"
$(MAKE) -C stripkernel

install-stripkernel:
@echo "Installing stripkernel"
$(MAKE) -C stripkernel install

remove-toolchain:
@echo "Removing toolchain install tree"
$(E)-rm -rf $(PREFIX)

clean-build:
@echo "Cleaning build dir"
rm -rf $(TOP)/output
rm -rf $(PREFIX)

If you run your executable under strace you'll be able to see what file(s) this executable tried to access.

statically linking strace, looks as if the executable cannot be found even though the file can be found.

[root@2WireBlockBuster /bin]# ./strace mount
execve("/bin/mount", ["mount"], [/* 14 vars */]) = -1 ENOENT (No such file or directory)
write(2, "strace: exec: No such file or dir"..., 40strace: exec: No such file or directory
) = 40
exit_group(1) = ?

Try run it as

Good point, I forgot, I still got a similar result. Something weird about the filesystem. I can run scripts, just not dynamically linked executable. I had to link busybox statically just to get the box up.

[root@2WireBlockBuster /bin]# ./strace ./mount
execve("./mount", ["./mount"], [/* 14 vars */]) = -1 ENOENT (No such file or directory)
write(2, "strace: exec: No such file or dir"..., 40strace: exec: No such file or directory
) = 40
exit_group(1) = ?
[root@2WireBlockBuster /bin]#


Another executable. We have the real lsmod since we are using busybox 1.00 and its module utils don't support 2.6. I did try a newer busybox, but had the same problem anyway.

[root@2WireBlockBuster /bin]# ./strace ./lsmod
execve("./lsmod", ["./lsmod"], [/* 14 vars */]) = -1 ENOENT (No such file or directory)
write(2, "strace: exec: No such file or dir"..., 40strace: exec: No such file or directory
) = 40


Doing an strace on a statically linked executable shows that strace works:

[root@2WireBlockBuster /bin]# ./strace ./ldd
execve("./ldd", ["./ldd"], [/* 14 vars */]) = 0
brk(0) = 0x450000
brk(0x450458) = 0x450458
set_thread_area(0x457440) = 0
ioctl(0, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
write(2, "ldd: missing file arguments\n"..., 28ldd: missing file arguments
) = 28
write(2, "Try `ldd --help' for more informa"..., 39Try `ldd --help' for more information.
) = 39
exit_group(1) = ?
[root@2WireBlockBuster /bin]#


The problem starts early due to the fact that mount can't be found (I am using the linux-utils mount instead of busybox) when Linux cannot mount its "special" filesystems.

Sending DHCP requests ., OK
IP-Config: Got DHCP answer from 10.5.255.254, my address is 10.5.252.165
IP-Config: Complete:
device=eth0, addr=10.5.252.165, mask=255.255.0.0, gw=10.5.0.1,
host=10.5.252.165, domain=2wire.com, nis-domain=(none),
bootserver=10.5.255.254, rootserver=10.5.251.61, rootpath=
Looking up port of RPC 100003/3 on 10.5.251.61
Looking up port of RPC 100005/3 on 10.5.251.61
VFS: Mounted root (nfs filesystem).
Freeing unused kernel memory: 160k freed
init started: BusyBox v1.00 (2000.01.01-00:00+0000) multi-call binary
Starting pid 38, console /dev/ttyS0: '/etc/init.d/rcS'
Mounting proc filesystem.
/etc/init.d/rcS: 16: mount: not found
Mounting /var.../etc/init.d/rcS: 25: mount: not found
failed!
/etc/init.d/rcS: 47: cannot create /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts: Directory nonexistent
Mounting all special filesystems.
/etc/init.d/rcS: 51: mount: not found
/etc/init.d/rcS: 52: mount: not found
/etc/init.d/rcS: 53: mount: not found
/etc/init.d/rcS: 54: mount: not found
/etc/init.d/rcS: 57: depmod: not found
Loading modules:
bcmdriver - /etc/init.d/rcS: 72: insmod: not found
Setting hostname.
Mounting /etc/config as JFFS2.../etc/init.d/rcS: 103: /bin/mount: not found
=> Creating config filesystem
/etc/init.d/rcS: 103: /bin/flash_eraseall: not found
/etc/init.d/rcS: 103: /bin/mount: not found
Config filesystem created successfully.
Factory reset detected
Starting pid 73, console /dev/ttyS0: '/etc/init.d/rc'
Configuring and Starting Network...done.
Starting Network Interface Plugging Daemon:/etc/rc2.d/S10ifplugd: 65: /sbin/ifplugd: not found
eth0.
Starting system log daemon: syslogdstart-stop-daemon: unable to start /sbin/syslogd: No such file or directory
klogdstart-stop-daemon: unable to start /sbin/klogd: No such file or directory
.
Starting NFS client daemons: portmapstart-stop-daemon: nothing in /proc - not mounted?
rpc.statdstart-stop-daemon: nothing in /proc - not mounted?
.
Starting Telnet Server: telnetd.

Very strange. Looks like something seriously messed.

I think may be for some reason your system only able to find file in the current directory.
i.e you able run
What about
?

I figured it out. The interpreter path was incorrect. I patched gcc with a mips patch, but the patch also changed the interpreter patch from /lib to /tools/lib . I changed it back to /lib and rebuild. Now everything is fine.

It was not able to find the ld-uClib.so. I discovered this by statically linking readelf and looking at mount.