Cross compile error “arm-none-eabi-g++ cannot find entry symbol”

Question

I have a problem about cross compile.

#include <stdio.h>

int main()
{
    printf("hello\n");
    return 0;
}

this is a simple hello world code I used.

I'm using arm-none-eabi-g++, downloaded from mentor graphics. Here is the error. I don't know what lib is missed.

/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/bin/ld: warning: cannot find entry symbol _start; defaulting to 00008018
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-abort.o): In function `abort':
abort.c:(.text+0x10): undefined reference to `_exit'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-signalr.o): In function `_kill_r':
signalr.c:(.text+0x1c): undefined reference to `_kill'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-signalr.o): In function `_getpid_r':
signalr.c:(.text+0x44): undefined reference to `_getpid'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-sbrkr.o): In function `_sbrk_r':
sbrkr.c:(.text+0x18): undefined reference to `_sbrk'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-writer.o): In function `_write_r':
writer.c:(.text+0x20): undefined reference to `_write'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-closer.o): In function `_close_r':
closer.c:(.text+0x18): undefined reference to `_close'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-fstatr.o): In function `_fstat_r':
fstatr.c:(.text+0x1c): undefined reference to `_fstat'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-isattyr.o): In function `_isatty_r':
isattyr.c:(.text+0x18): undefined reference to `_isatty'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-lseekr.o): In function `_lseek_r':
lseekr.c:(.text+0x20): undefined reference to `_lseek'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-readr.o): In function `_read_r':
readr.c:(.text+0x20): undefined reference to `_read'
collect2: error: ld returned 1 exit status

and this is compiler version.

$ arm-linux-gnueabi-g++ -v

Using built-in specs. COLLECT_GCC=/home/kang/Utils/arm-2013.05/bin/arm-none-eabi-g++ COLLECT_LTO_WRAPPER=/home/kang/Utils/arm-2013.05/bin/../libexec/gcc/arm-none-eabi/4.7.3/lto-wrapper Target: arm-none-eabi Configured with: /scratch/jbrown/2013.05-arm-eabi-release/src/gcc-4.7-2013.05/configure --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=arm-none-eabi --enable-threads --disable-libmudflap --disable-libssp --disable-libstdcxx-pch --enable-extra-sgxxlite-multilibs --with-gnu-as --with-gnu-ld --with-specs='%{save-temps: -fverbose-asm} -D__CS_SOURCERYGXX_MAJ__=2013 -D__CS_SOURCERYGXX_MIN__=5 -D__CS_SOURCERYGXX_REV__=23 %{O2:%{!fno-remove-local-statics: -fremove-local-statics}} %{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics: -fremove-local-statics}}}' --enable-languages=c,c++ --disable-shared --enable-lto --with-newlib --with-pkgversion='Sourcery CodeBench Lite 2013.05-23' --with-bugurl= https://sourcery.mentor.com/GNUToolchain/ --disable-nls --prefix=/opt/codesourcery --with-headers=yes --wit h-sysroot=/opt/codesourcery/arm-none-eabi --with-build-sysroot=/scratch/jbrown/2013.05-arm-eabi-release/install/arm-none-eabi --with-gmp=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-mpfr=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-mpc=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-ppl=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-cloog=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-libelf=/scratch/jbrown/2 013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --disable-libgomp --disable-libitm --enable-poison-system-directories --with-build-time-tools=/scratch/jbrown/2013.05-arm-eabi-release/install/arm-none-eabi/bin --with-build-time-tools=/scratch/jbrown/2013.05-arm-eabi-release/install/arm-none-eabi/bin Thread model: single gcc version 4.7.3 (Sourcery CodeBench Lite 2013.05-23)

Answer 1

You downloaded the wrong toolchain.

arm-linux-gnueabi-g++ is built using arm-none-eabi , which is used for bare metal programs. This does not contain libc ie the standard libraries (glibc or eglibc) are not present in this toolchain.

So, you need to download the arm-none-linux-gnueabi toolchain (ie arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2 , not arm-2013.11-24-arm-none-eabi-i686-pc-linux-gnu.tar.bz2 ).

To verify the above, type:

cd /home/kang/Utils/arm-2013.05/arm-none-eabi 

Here you will find only bin include lib share , and no libc directory.

Download arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2 ; here you'll find a folder arm-2013.05/arm-none-linux-gnueabi/libc .

You can also verify by writing:

arm-linux-eabi-g++ -print-sysroot and 
arm-none-linux-gnueabi-g++ -print-sysroot

Also refer to this previous question: how to work with external libraries when cross compiling?

Answer 2

I'm using arm-linux-gnueabi-g++. it downloaded form mentor graphics.

This is misnamed. All your output suggests that Mentor Graphics have packaged a arm-none-gnueabi toolchain and incorrectly named it arm-linux-gnueabi (which doesn't even fit naming conventions).

sorry, I mistyped my compiler. I'm using arm-none-eabi-g++

Get yourself a version of the arm-none-linux-gnueabi toolchain (ie targetting GNU/Linux rather than EABI).

This one will contain the GCC runtime which interfaces with the Linux operating system. All those functions you're missing right now are part of that interface.