Cannot compile HelloWorld with OpenEmbedded LinuxV2.6

Technical Support
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1

I am trying to run hello world example project in colibrivf61 with 2.6 image. The error still occurs after including sysroot. Please help

akn@akn-Vostro-2420:~/hello_world$ export CROSS_COMPILE=~/oe-core/build/out-glibc/sysroots/x86_64-linux/usr/bin/arm-angstrom-linux-gnueabi/arm-angstrom-linux-gnueabi-

akn@akn-Vostro-2420:~/hello_world$ ${CROSS_COMPILE}gcc --sysroot=~/oe-core/build/out-glibc/sysroots/colibri-vf -mfloat-abi=hard -o hello_world hello_world.c

hello_world.c:1:64: fatal error: stdio.h: No such file or directory compilation terminated. akn@akn-Vostro-2420:~/hello_world$

2

You generated toolchain based on your build?

E.g.:

bitbake core-image-minimal -c meta-toolchain

Or

bitbake core-image-minimal -c populate_sdk

Then access tmp/deploy/sdk/ and install the toolchain on the host? It would be the correct way to cross-compiling with your host.

After install, normally located in /opt/poky/NUMBER_DISTRO_VERSION/ and you run source environment-setup-xxxxxx-poky-linux-gnueabi.

More information:

Yocto Project Reference Manual

Yocto Project Reference Manual

Cleiton Bueno

Blog | Linkedin | B2Open

3

We would recommend building the SDK

bitbake -c populate_sdk angstrom-lxde-image

and then installing the SDK with

./out-glibc/deploy/sdk/angstrom-glibc-x86_64-armv7at2hf-vfp-neon-v2015.12-toolchain.sh -S

Assuming the standard installation paths for SDK, below command should work

/usr/local/oecore-x86_64/sysroots/x86_64-angstromsdk-linux/usr/bin/arm-angstrom-linux-gnueabi/arm-angstrom-linux-gnueabi-gcc --sysroot=/usr/local/oecore-x86_64/sysroots/armv7at2hf-vfp-neon-angstrom-linux-gnueabi -mfloat-abi=hard  -o hello hello.c

Alternatively one might also use a Makefile like below

CC = /usr/local/oecore-x86_64/sysroots/x86_64-angstromsdk-linux/usr/bin/arm-angstrom-linux-gnueabi/arm-angstrom-linux-gnueabi-gcc
INCLUDES = -I/usr/local/oecore-x86_64/sysroots/armv7at2hf-vfp-neon-angstrom-linux-gnueabi/usr/include
LIB_PATH = -L/usr/local/oecore-x86_64/sysroots/armv7at2hf-vfp-neon-angstrom-linux-gnueabi/lib
LIBS = -lpthread
CFLAGS = -O2 -g -Wall -mfloat-abi=hard --sysroot=/usr/local/oecore-x86_64/sysroots/armv7at2hf-vfp-neon-angstrom-linux-gnueabi

all:
	${CC} ${CFLAGS} ${INCLUDES} ${LIB_PATH} ${LIBS} hello.c -o hello

clean:
	rm -rf hello