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 –with-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/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
–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)
Best Answer
You downloaded the wrong toolchain.
arm-linux-gnueabi-g++
is built usingarm-none-eabi
, which is used for bare metal programs. This does not contain libc i.e the standard libraries (glibc or eglibc) are not present in this toolchain.So, you need to download the
arm-none-linux-gnueabi
toolchain (i.earm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
, notarm-2013.11-24-arm-none-eabi-i686-pc-linux-gnu.tar.bz2
).To verify the above, type:
Here you will find only
bin include lib share
, and nolibc
directory.Download
arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
; here you'll find a folderarm-2013.05/arm-none-linux-gnueabi/libc
.You can also verify by writing:
Also refer to this previous question: how to work with external libraries when cross compiling?