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zephyrproject-rtos / meta-zephyr-sdk

Zephyr SDK (obsolete)
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Newlib for ARC toolchain fails to integrate with Zephyr #35

Closed zephyrbot closed 8 years ago

zephyrbot commented 8 years ago

Reported by Iván Briano:

Building for ARC and using Newlib results in a build failure.

To reproduce, go to samples/helloworld/nanokernel

cat >> prj.conf <<EOF CONFIG_NEWLIB_LIBC=y CONFIG_STDOUT_CONSOLE=y EOF

make BOARD=quark_se_sss_devboard ARCH=arc

At the linking step, it will fail with:

/home/sachiel/zephyr-sdk/public/sysroots/i686-pokysdk-linux/usr/bin/arc-poky-elf/arc-poky-elf-ld: Error: Linker symbol __SDATA_BEGIN__ not found /home/sachiel/zephyr-sdk/public/sysroots/i686-pokysdk-linux/usr/bin/arc-poky-elf/arc-poky-elf-ld: final link failed: Bad value

Presumably because newlib is built without the -mno-sdata flag that Zephyr's ARC build requires.

(Imported from Jira SDK-17)

zephyrbot commented 8 years ago

by Juro Bystricky:

I could reproduce the problem. Rebuilding of newlib with -mno-sdata "fixes" the problem, but causes /home/juro/sdk-zephyr-arc-newlib/sysroots/arc-poky-elf/usr/arc-poky-elf/lib/em/libc.a(lib_a-sbrk.o): In function _sbrk_r': /data/zephyr-sdk-0.7.4-git/poky/build-zephyr-arc/tmp/work/arc-poky-elf/newlib/2.2.0-r0/git/arc-poky-elf/em/newlib/libc/sys/arc/../../../../../.././newlib/libc/sys/arc/sbrk.c:15: undefined reference to__start_heap' /data/zephyr-sdk-0.7.4-git/poky/build-zephyr-arc/tmp/work/arc-poky-elf/newlib/2.2.0-r0/git/arc-poky-elf/em/newlib/libc/sys/arc/../../../../../.././newlib/libc/sys/arc/sbrk.c:25: undefined reference to `__end_heap'

zephyrbot commented 8 years ago

by Iván Briano:

A word of advice. Don't post links to internal things in public forums, even if the content is not confidential, it's not polite with the people that can't access them.

zephyrbot commented 8 years ago

by Iván Briano:

With that SDK, building for ARC works as expected. Thanks.

zephyrbot commented 8 years ago

by Juro Bystricky:

Thanks. I keep forgetting Zephyr is public now, my apologies.

zephyrbot commented 8 years ago

by Juro Bystricky:

The new newlib will be included in SDK 0.7.5

zephyrbot commented 8 years ago

by changru fan:

Fixed in zephyr-sdk-0.7.5. Verified against zephyr-kernel-1.1.0-160311-f9d1d56 + zephyr-sdk 0.7.5, this issue was fixed.