Re: Barebones toolchain multiple definition of `_start'

[Khem Raj <raj dot khem at gmail dot com>]

On Sat, Feb 4, 2012 at 8:27 PM, David Wuertele <wuertele@gmail.com> wrote:
> Nvidia's Tegra PDK comes with a toolchain from CodeSourcery for
> building their bootloader. Âgcc --version reports:
>
> Âarm-none-eabi-gcc (Sourcery G++ Lite 2009q3-68) 4.4.1
>
> The CodeSourcery toolchain works fine. ÂBut I wanted to try ct-ng.
> I used menuconfig to set up a barebones toolchain and built it.
> I've attached .config.2. Â gcc --version reports:
>
> Âarm-crosstool-eabi-gcc (crosstool-NG 1.14.0) 4.4.6
>
> I specified the toolchain to the bootloader
> makefile, and all seemed to work, except for the final link:
>
> $X_TOOLS/arm-crosstool-eabi/bin/arm-crosstool-eabi-gcc
> -Wl,-Tmake/cop.ldscript -Wl,-Map=_out/debug_p852/images/cop_stage1.map
> -L$X_TOOLS/arm-crosstool-eabi/arm-crosstool-eabi/sysroot/lib/armv4t
> arch/tegra2/core/_out/debug_p852_cop_stage1/cop_init.o
> ${STAGE2_FILES_OUT} -Wl,--whole-archive
> arch/tegra2/core/_out/debug_p852_cop_stage1/libtegra2core.a
> (lots more .a files skipped for brevity)
> -Wl,--no-whole-archive -Wl,--gc-sections -o
> _out/debug_p852/images/cop_stage;
>

pass -nostartfiles  -nodefaultlibs to link step

> arch/tegra2/core/_out/debug_p852_cop_stage1/cop_init.o: In function
> `_start': cop_init.c:(.startup+0x0): multiple definition of `_start'
> $X_TOOLS/arm-crosstool-eabi/lib/gcc/arm-crosstool-eabi/4.4.6/../../../../
> arm-crosstool-eabi/lib/crt0.o:$CROSSTOOL/.build/src/newlib-1.17.0/libgloss/arm/crt0.S:83:
> first defined here
> $X_TOOLS/arm-crosstool-eabi/lib/gcc/arm-crosstool-eabi/4.4.6/../../../../
> arm-crosstool-eabi/lib/crt0.o:
> In function `start': (.text+0xe0): undefined reference to `main'
> $X_TOOLS/arm-crosstool-eabi/lib/gcc/arm-crosstool-eabi/4.4.6/../../../../
> arm-crosstool-eabi/lib/libc.a(lib_a-exit.o):
> In function `exit':
> $CROSSTOOL/.build/src/newlib-1.17.0/newlib/libc/stdlib/exit.c:65:
> undefined reference to `_exit'
> $X_TOOLS/arm-crosstool-eabi/lib/gcc/arm-crosstool-eabi/4.4.6/../../../../
> arm-crosstool-eabi/lib/libc.a(lib_a-sbrkr.o):
> In function `_sbrk_r':
> $CROSSTOOL/.build/src/newlib-1.17.0/newlib/libc/reent/sbrkr.c:60:
> undefined reference to `_sbrk' collect2: ld returned 1 exit status
>
> The only thing I changed was the toolchain. ÂWhy would the ct-ng
> toolchain have this problem while CodeSourcery does not?
>
> Dave
>
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