Yocto Hello World: Difference between revisions
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<!-- Set release according to "release" parameter in URL and use | <!-- Set release according to "release" parameter in URL and use MORTY_V1.0_DART-6UL as default | ||
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= Yocto references = | = Yocto references = | ||
* [http://www.yoctoproject.org/docs/2.1/adt-manual/adt-manual.html Yocto Project Application Developer's Guide 2.1]<br> | |||
* Full Yocto OpenEmbedded environment is required for this tutorial.<br> See detailed instructions here: {{Varlink|{{#var:BUILD_RELEASE_GUIDE}}|{{#var:RELEASE_LINK}}|Build {{#var:PLATFORM_OS}} from source code}} | |||
= Sample C "Hello, world!" program = | = Sample C "Hello, world!" program = | ||
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do_compile() { | do_compile() { | ||
${CC} myhello.c -o myhello | ${CC} myhello.c ${LDFLAGS} -o myhello | ||
} | } | ||
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Create the following directory tree under your Yocto directory, and place in it the two files described above: | Create the following directory tree under your Yocto directory, and place in it the two files described above: | ||
2 directories, 2 files | sources/{{#var:META_VARISCITE_REPO|meta-variscite-fslc}}/recipes-examples/ | ||
└── myhello | |||
├── files | |||
│ └── myhello.c | |||
└── myhello.bb | |||
2 directories, 2 files | |||
== Build == | == Build == | ||
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To add the output of this recipe to your output images, add the following to your conf/local.conf file in your Yocto build directory: | To add the output of this recipe to your output images, add the following to your conf/local.conf file in your Yocto build directory: | ||
IMAGE_INSTALL{{#var:YOCTO_OVERRIDE_PREFIX}}append = " myhello" | |||
This will put the myhello app in your rootfs. | This will put the myhello app in your rootfs. | ||
Latest revision as of 21:09, 23 August 2024
Warning: This page is designed to be used with a 'release' URL parameter.
This page is using the default release RELEASE_MORTY_V1.0_DART-6UL.
To view this page for a specific Variscite SoM and software release, please follow these steps:
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DART-6UL - Hello, World!
Yocto references
- Yocto Project Application Developer's Guide 2.1
- Full Yocto OpenEmbedded environment is required for this tutorial.
See detailed instructions here: Build Yocto from source code
Sample C "Hello, world!" program
Create a file called myhello.c with the following content:
#include <stdio.h>
int main() {
printf("Hello, World!\n");
return 0;
}
Building out of Yocto
Toolchain installation for out of Yocto builds
To install the toolchain follow Yocto Toolchain installation guide.
Build
Source the environment setup script (see the previous "Toolchain installation" section) Compile: $ $CC myhello.c -o myhello
Now you should have an app called myhello, that can be copied (using scp, for example) and run on your target board.
Building using Yocto
Sample bitbake recipe of an "Hello, world!" application
Create a file called myhello.bb with the following content:
DESCRIPTION = "Simple helloworld application"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
SRC_URI = "file://myhello.c"
S = "${WORKDIR}"
do_compile() {
${CC} myhello.c ${LDFLAGS} -o myhello
}
do_install() {
install -d ${D}${bindir}
install -m 0755 myhello ${D}${bindir}
}
Create the following directory tree under your Yocto directory, and place in it the two files described above:
sources/meta-variscite-fslc/recipes-examples/
└── myhello
├── files
│ └── myhello.c
└── myhello.bb
2 directories, 2 files
Build
Run the following in your Yocto build directory:
$ bitbake myhello
To find the location of the output package you can run the following in your Yocto build directory:
$ cd tmp/deploy/rpm $ find -name myhello*
To add the output of this recipe to your output images, add the following to your conf/local.conf file in your Yocto build directory:
IMAGE_INSTALL_append = " myhello"
This will put the myhello app in your rootfs.