Using libjansson with openembedded on apalis imx6

Technical Support
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1

Hello,

How can I use libjansson with OpenEmbedded

I tried “bitbake libjansson” but can’t find any ipk file under deploy/ipk

Also how can I cross compile an application that uses libjansson. I prepared the below makefile

SYSROOTS ?= /usr/local/oecore-x86_64/sysroots

CC = ${SYSROOTS}/x86_64-angstromsdk-linux/usr/bin/arm-angstrom-linux-gnueabi/arm-angstrom-linux-gnueabi-gcc

INCLUDES = -I${SYSROOTS}/armv7at2hf-neon-angstrom-linux-gnueabi/usr/include

LIB_PATH = -L${SYSROOTS}/armv7at2hf-neon-angstrom-linux-gnueabi/lib

LIBS = -lpthread -ljansson

CFLAGS = -O2 -g -Wall -mfloat-abi=hard --sysroot=${SYSROOTS}/armv7at2hf-neon-angstrom-linux-gnueabi

 all:	${CC} ${CFLAGS} ${INCLUDES} ${LIB_PATH} ${LIBS}

hello.c -o hello
clean: rm -rf hello

but get an error “cannot find -ljansson”

I would be happy if you can guide me about this

2

The name for libjansson library in OpenEmbedded is jansson. The command would thus be

bitbake jansson

This can be added to the image by having the following in ~oe-core/build/conf/local.conf

IMAGE_INSTALL_append = " jansson"

Any generated SDK as described here would have jansson included as well.

3

thanks a lot, found them now.
I made a typo in my first post, I used “bitbake jansson” command.
However I was trying to see them under apalis imx6 folder.