2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
# dockcross
|
|
|
|
|
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
Cross compiling toolchains in Docker images.
|
|
|
|
|
|
|
|
|
|
[](https://github.com/dockcross/dockcross/actions?query=branch%3Amaster)
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Features
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
- Pre-built and configured toolchains for cross compiling.
|
|
|
|
|
- Most images also contain an emulator for the target system.
|
|
|
|
|
- Clean separation of build tools, source code, and build artifacts.
|
|
|
|
|
- Commands in the container are run as the calling user, so that any
|
|
|
|
|
created files have the expected ownership, (i.e. not root).
|
|
|
|
|
- Make variables ([CC]{.title-ref}, [LD]{.title-ref} etc) are set to
|
|
|
|
|
point to the appropriate tools in the container.
|
|
|
|
|
- Recent [CMake](https://cmake.org) and ninja are precompiled.
|
|
|
|
|
- [Conan.io](https://www.conan.io) can be used as a package manager.
|
|
|
|
|
- Toolchain files configured for CMake.
|
|
|
|
|
- Current directory is mounted as the container\'s workdir, `/work`.
|
|
|
|
|
- Works with the [Docker for
|
|
|
|
|
Mac](https://docs.docker.com/docker-for-mac/) and [Docker for
|
|
|
|
|
Windows](https://docs.docker.com/docker-for-windows/).
|
|
|
|
|
- Support using alternative container executor by setting
|
|
|
|
|
[OCI_EXE]{.title-ref} environment variable. By default, it searches
|
|
|
|
|
for [docker]{.title-ref} and
|
|
|
|
|
\[[podman]{.title-ref}\](<https://podman.io/>) executable.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Examples
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
1. `dockcross make`: Build the *Makefile* in the current directory.
|
|
|
|
|
2. `dockcross cmake -Bbuild -H. -GNinja`: Run CMake with a build
|
|
|
|
|
directory `./build` for a *CMakeLists.txt* file in the current
|
|
|
|
|
directory and generate `ninja` build configuration files.
|
|
|
|
|
3. `dockcross ninja -Cbuild`: Run ninja in the `./build` directory.
|
|
|
|
|
4. `dockcross bash -c '$CC test/C/hello.c -o hello'`: Build the
|
|
|
|
|
*hello.c* file with the compiler identified with the `CC`
|
|
|
|
|
environmental variable in the build environment.
|
|
|
|
|
5. `dockcross bash`: Run an interactive shell in the build environment.
|
|
|
|
|
|
|
|
|
|
Note that commands are executed verbatim. If any shell processing for
|
|
|
|
|
environment variable expansion or redirection is required, please use
|
|
|
|
|
[bash -c \'command args\...\']{.title-ref}.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Installation
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
This image does not need to be run manually. Instead, there is a helper
|
|
|
|
|
script to execute build commands on source code existing on the local
|
|
|
|
|
host filesystem. This script is bundled with the image.
|
|
|
|
|
|
|
|
|
|
To install the helper script, run one of the images with no arguments,
|
|
|
|
|
and redirect the output to a file:
|
|
|
|
|
|
|
|
|
|
docker run --rm CROSS_COMPILER_IMAGE_NAME > ./dockcross
|
|
|
|
|
chmod +x ./dockcross
|
|
|
|
|
mv ./dockcross ~/bin/
|
|
|
|
|
|
|
|
|
|
Where [CROSS_COMPILER_IMAGE_NAME]{.title-ref} is the name of the
|
|
|
|
|
cross-compiler toolchain Docker instance, e.g.
|
|
|
|
|
[dockcross/linux-armv7]{.title-ref}.
|
|
|
|
|
|
|
|
|
|
Only 64-bit x86_64 images are provided; a 64-bit x86_64 host system is
|
|
|
|
|
required.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Usage
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
For the impatient, here\'s how to compile a hello world for armv7:
|
|
|
|
|
|
|
|
|
|
cd ~/src/dockcross
|
|
|
|
|
docker run --rm dockcross/linux-armv7 > ./dockcross-linux-armv7
|
|
|
|
|
chmod +x ./dockcross-linux-armv7
|
|
|
|
|
./dockcross-linux-armv7 bash -c '$CC test/C/hello.c -o hello_arm'
|
|
|
|
|
|
|
|
|
|
Note how invoking any toolchain command (make, gcc, etc.) is just a
|
|
|
|
|
matter of prepending the **dockcross** script on the commandline:
|
|
|
|
|
|
|
|
|
|
./dockcross-linux-armv7 [command] [args...]
|
|
|
|
|
|
|
|
|
|
The dockcross script will execute the given command-line inside the
|
|
|
|
|
container, along with all arguments passed after the command. Commands
|
|
|
|
|
that evaluate environmental variables in the image, like
|
|
|
|
|
[\$CC]{.title-ref} above, should be executed in [bash -c].
|
|
|
|
|
The present working directory is mounted within the image, which can be
|
|
|
|
|
used to make source code available in the Docker container.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Cross compilers
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/base
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
   
|
2021-06-29 17:30:05 +02:00
|
|
|
|
2021-06-29 16:44:11 +02:00
|
|
|
Base image for other toolchain images. From Debian Jessie with GCC,
|
|
|
|
|
make, autotools, CMake, Ninja, Git, and Python.
|
|
|
|
|
|
|
|
|
|
### dockcross/android-arm
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
The Android NDK standalone toolchain for the arm architecture.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/android-arm64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
The Android NDK standalone toolchain for the arm64 architecture.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/android-x86
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
The Android NDK standalone toolchain for the x86 architecture.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/android-x86_64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
The Android NDK standalone toolchain for the x86_64 architecture.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-arm64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Cross compiler for the 64-bit ARM platform on Linux, also known as
|
|
|
|
|
AArch64.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-arm64-musl
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Cross compiler for the 64-bit ARM platform on Linux (also known as
|
|
|
|
|
AArch64), using [musl](https://www.musl-libc.org/) as base \"libc\".
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-armv5
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux armv5 cross compiler toolchain for legacy devices like the
|
|
|
|
|
Parrot AR Drone.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-armv5-musl
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux armv5 cross compiler toolchain using
|
|
|
|
|
[musl](https://www.musl-libc.org/) as base \"libc\".
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-armv6
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
  
|
|
|
|
|
|
|
|
|
|
Linux ARMv6 cross compiler toolchain for the Raspberry Pi, etc.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-armv6-musl
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux ARMv6 cross compiler toolchain for the Raspberry Pi, etc,
|
|
|
|
|
using [musl](https://www.musl-libc.org/) as base \"libc\".
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-armv7
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Generic Linux armv7 cross compiler toolchain.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-armv7a
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Toolchain configured for ARMv7-A used in Beaglebone Black single
|
|
|
|
|
board PC with TI SoC AM3358 on board, Cortex-A8.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-armv7l-musl
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Toolchain configured for ARMv7-L, using
|
|
|
|
|
[musl](https://www.musl-libc.org/) as base \"libc\".
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-mipsel
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux mipsel cross compiler toolchain for little endian MIPS GNU
|
|
|
|
|
systems.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-mips
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux mips cross compiler toolchain for big endian 32-bit hard float
|
|
|
|
|
MIPS GNU systems.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-s390x
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux s390x cross compiler toolchain for S390X GNU systems.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
2021-07-02 22:44:47 +02:00
|
|
|
### dockcross/linux-riscv64
|
|
|
|
|
|
|
|
|
|
  
|
|
|
|
|
|
|
|
|
|
Linux risc-v 64bit cross compiler toolchain for risc-v 64bit GNU systems.
|
|
|
|
|
|
|
|
|
|
### dockcross/linux-riscv32
|
|
|
|
|
|
|
|
|
|
  
|
|
|
|
|
|
|
|
|
|
Linux risc-v 32bit cross compiler toolchain for risc-v 32bit GNU systems.
|
|
|
|
|
|
2021-07-02 22:42:07 +02:00
|
|
|
### dockcross/linux-m68k-uclibc
|
|
|
|
|
|
|
|
|
|
  
|
|
|
|
|
|
|
|
|
|
Linux m68k cross compiler toolchain for m68k GNU systems (http://www.mac.linux-m68k.org/ and http://www.linux-m68k.org/).
|
|
|
|
|
|
2021-06-29 16:44:11 +02:00
|
|
|
### dockcross/linux-ppc64le
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux PowerPC 64 little endian cross compiler toolchain for the
|
|
|
|
|
POWER8, etc. Important: Due to Issue #430, automatic build of newer
|
|
|
|
|
images has been disabled.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-x64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux x86_64 / amd64 compiler. Since the Docker image is natively
|
|
|
|
|
x86_64, this is not actually a cross compiler.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-x64-clang
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux clang x86_64 / amd64 compiler. Since the Docker image is
|
|
|
|
|
natively x86_64, this is not actually a cross compiler.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/linux-x86
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Linux i686 cross compiler.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/manylinux2014-x64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Docker [manylinux2014](https://github.com/pypa/manylinux) image for
|
|
|
|
|
building Linux x86_64 / amd64 [Python wheel
|
|
|
|
|
packages](http://pythonwheels.com/). It includes Python 3.5, 3.6,
|
|
|
|
|
3.7, 3.8, and 3.9. Also has support for the dockcross script, and it
|
|
|
|
|
has installations of CMake, Ninja, and
|
|
|
|
|
[scikit-build](http://scikit-build.org). For CMake, it sets
|
|
|
|
|
[MANYLINUX2014]{.title-ref} to \"TRUE\" in the toolchain.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/manylinux2014-x86
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Docker [manylinux2014](https://github.com/pypa/manylinux) image for
|
|
|
|
|
building Linux i686 [Python wheel
|
|
|
|
|
packages](http://pythonwheels.com/). It includes Python 3.5, 3.6,
|
|
|
|
|
3.7, 3.8, and 3.9. Also has support for the dockcross script, and it
|
|
|
|
|
has installations of CMake, Ninja, and
|
|
|
|
|
[scikit-build](http://scikit-build.org). For CMake, it sets
|
|
|
|
|
[MANYLINUX2014]{.title-ref} to \"TRUE\" in the toolchain.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/manylinux2014-aarch64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Docker [manylinux2014](https://github.com/pypa/manylinux) image for
|
|
|
|
|
building Linux aarch64 / arm64 [Python wheel
|
|
|
|
|
packages](http://pythonwheels.com/). It includes Python 3.5, 3.6,
|
|
|
|
|
3.7, 3.8, and 3.9. Also has support for the dockcross script, and it
|
|
|
|
|
has installations of CMake, Ninja, and
|
|
|
|
|
[scikit-build](http://scikit-build.org). For CMake, it sets
|
|
|
|
|
[MANYLINUX2014]{.title-ref} to \"TRUE\" in the toolchain.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/manylinux2010-x64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Docker [manylinux2010](https://github.com/pypa/manylinux)
|
|
|
|
|
image for building Linux x86_64 / amd64 [Python wheel
|
|
|
|
|
packages](http://pythonwheels.com/). It includes Python 2.7, 3.4,
|
|
|
|
|
3.5, 3.6, 3.7 and 3.8. Also has support for the dockcross script,
|
|
|
|
|
and it has installations of CMake, Ninja, and
|
|
|
|
|
[scikit-build](http://scikit-build.org). For CMake, it sets
|
|
|
|
|
[MANYLINUX2010]{.title-ref} to \"TRUE\" in the toolchain.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/manylinux2010-x86
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Docker [manylinux2010](https://github.com/pypa/manylinux) image for
|
|
|
|
|
building Linux i686 [Python wheel
|
|
|
|
|
packages](http://pythonwheels.com/). It includes Python 2.7, 3.4,
|
|
|
|
|
3.5, 3.6, 3.7 and 3.8. Also has support for the dockcross script,
|
|
|
|
|
and it has installations of CMake, Ninja, and
|
|
|
|
|
[scikit-build](http://scikit-build.org). For CMake, it sets
|
|
|
|
|
[MANYLINUX2010]{.title-ref} to \"TRUE\" in the toolchain.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/manylinux1-x64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Docker [manylinux1](https://github.com/pypa/manylinux/tree/manylinux1)
|
|
|
|
|
image for building Linux x86_64 / amd64 [Python wheel
|
|
|
|
|
packages](http://pythonwheels.com/). It includes Python 2.7, 3.4,
|
|
|
|
|
3.5, 3.6, 3.7 and 3.8. Also has support for the dockcross script,
|
|
|
|
|
and it has installations of CMake, Ninja, and
|
|
|
|
|
[scikit-build](http://scikit-build.org). For CMake, it sets
|
|
|
|
|
[MANYLINUX1]{.title-ref} to \"TRUE\" in the toolchain.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/manylinux1-x86
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
Docker [manylinux1](https://github.com/pypa/manylinux/tree/manylinux1)
|
|
|
|
|
image for building Linux i686 [Python wheel
|
|
|
|
|
packages](http://pythonwheels.com/). It includes Python 2.7, 3.4,
|
|
|
|
|
3.5, 3.6, 3.7 and 3.8. Also has support for the dockcross script,
|
|
|
|
|
and it has installations of CMake, Ninja, and
|
|
|
|
|
[scikit-build](http://scikit-build.org). For CMake, it sets
|
|
|
|
|
[MANYLINUX1]{.title-ref} to \"TRUE\" in the toolchain.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/web-wasm
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
The Emscripten WebAssembly/asm.js/JavaScript cross compiler.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/windows-static-x64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
64-bit Windows cross-compiler based on [MXE/MinGW-w64](https://mxe.cc/) with win32 threads and static
|
|
|
|
|
linking.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/windows-static-x64-posix
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
64-bit Windows cross-compiler based on [MXE/MinGW-w64](https://mxe.cc/) with posix threads and static
|
|
|
|
|
linking.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/windows-static-x86
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
32-bit Windows cross-compiler based on [MXE/MinGW-w64](https://mxe.cc/) with win32 threads and static linking.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/windows-shared-x64
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
64-bit Windows cross-compiler based on [MXE/MinGW-w64](https://mxe.cc/) with win32 threads and dynamic linking.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/windows-shared-x64-posix
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 17:30:05 +02:00
|
|
|
|
|
|
|
|
64-bit Windows cross-compiler based on [MXE/MinGW-w64](https://mxe.cc/) with posix threads and dynamic linking.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
### dockcross/windows-shared-x86
|
|
|
|
|
|
2021-06-29 17:03:12 +02:00
|
|
|
  
|
2021-06-29 16:44:11 +02:00
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
32-bit Windows cross-compiler based on [MXE/MinGW-w64](https://mxe.cc/) with win32 threads and dynamic linking.
|
|
|
|
|
|
|
|
|
|
## Articles
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
- [dockcross: C++ Write Once, Run
|
|
|
|
|
Anywhere](https://nbviewer.jupyter.org/format/slides/github/dockcross/cxx-write-once-run-anywhere/blob/master/dockcross_CXX_Write_Once_Run_Anywhere.ipynb#/)
|
|
|
|
|
- [Cross-compiling binaries for multiple architectures with
|
|
|
|
|
Docker](https://web.archive.org/web/20170912153531/http://blogs.nopcode.org/brainstorm/2016/07/26/cross-compiling-with-docker)
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Built-in update commands
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
A special update command can be executed that will update the source
|
|
|
|
|
cross-compiler Docker image or the dockcross script itself.
|
|
|
|
|
|
|
|
|
|
- `dockcross [--] command [args...]`: Forces a command to run inside
|
|
|
|
|
the container (in case of a name clash with a built-in command), use
|
|
|
|
|
`--` before the command.
|
|
|
|
|
- `dockcross update-image`: Fetch the latest version of the docker
|
|
|
|
|
image.
|
|
|
|
|
- `dockcross update-script`: Update the installed dockcross script
|
|
|
|
|
with the one bundled in the image.
|
|
|
|
|
- `dockcross update`: Update both the docker image, and the dockcross
|
|
|
|
|
script.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Download all images
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
To easily download all images, the convenience target `display_images`
|
|
|
|
|
could be used:
|
|
|
|
|
|
|
|
|
|
curl https://raw.githubusercontent.com/dockcross/dockcross/master/Makefile -o dockcross-Makefile
|
|
|
|
|
for image in $(make -f dockcross-Makefile display_images); do
|
|
|
|
|
echo "Pulling dockcross/$image"
|
|
|
|
|
docker pull dockcross/$image
|
|
|
|
|
done
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Install all dockcross scripts
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
To automatically install in `~/bin` the dockcross scripts for each
|
|
|
|
|
images already downloaded, the convenience target `display_images` could
|
|
|
|
|
be used:
|
|
|
|
|
|
|
|
|
|
curl https://raw.githubusercontent.com/dockcross/dockcross/master/Makefile -o dockcross-Makefile
|
|
|
|
|
for image in $(make -f dockcross-Makefile display_images); do
|
|
|
|
|
if [[ $(docker images -q dockcross/$image) == "" ]]; then
|
|
|
|
|
echo "~/bin/dockcross-$image skipping: image not found locally"
|
|
|
|
|
continue
|
|
|
|
|
fi
|
|
|
|
|
echo "~/bin/dockcross-$image ok"
|
|
|
|
|
docker run dockcross/$image > ~/bin/dockcross-$image && \
|
|
|
|
|
chmod u+x ~/bin/dockcross-$image
|
|
|
|
|
done
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Dockcross configuration
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
The following environmental variables and command-line options are used.
|
|
|
|
|
In all cases, the command-line option overrides the environment
|
|
|
|
|
variable.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
### DOCKCROSS_CONFIG / \--config\|-c \<path-to-config-file>
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
This file is sourced, if it exists, before executing the rest of the
|
|
|
|
|
dockcross script.
|
|
|
|
|
|
|
|
|
|
Default: `~/.dockcross`
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
### DOCKCROSS_IMAGE / \--image\|-i \<docker-image-name>
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
The Docker cross-compiler image to run.
|
|
|
|
|
|
|
|
|
|
Default: Image with which the script was created.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
### DOCKCROSS_ARGS / \--args\|-a \<docker-run-args>
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
Extra arguments to pass to the `docker run` command. Quote the entire
|
|
|
|
|
set of args if they contain spaces.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## Per-project dockcross configuration
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
If a shell script named `.dockcross` is found in the current directory
|
|
|
|
|
where the dockcross script is started, it is executed before the
|
|
|
|
|
dockcross script `command` argument. The shell script is expected to
|
|
|
|
|
have a shebang like `#!/usr/bin/env bash`.
|
|
|
|
|
|
|
|
|
|
For example, commands like
|
|
|
|
|
`git config --global advice.detachedHead false` can be added to this
|
|
|
|
|
script.
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## How to extend Dockcross images
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
In order to extend Dockcross images with your own commands, one must:
|
|
|
|
|
|
|
|
|
|
1. Use `FROM dockcross/<name_of_image>`.
|
|
|
|
|
2. Set `DEFAULT_DOCKCROSS_IMAGE` to a name of the tag you\'re planning
|
|
|
|
|
to use for the image. This tag must then be used during the build
|
|
|
|
|
phase, unless you mean to pass the resulting helper script the
|
|
|
|
|
`DOCKCROSS_IMAGE` argument.
|
|
|
|
|
|
|
|
|
|
An example Dockerfile would be:
|
|
|
|
|
|
|
|
|
|
FROM dockcross/linux-armv7
|
|
|
|
|
|
|
|
|
|
ENV DEFAULT_DOCKCROSS_IMAGE my_cool_image
|
|
|
|
|
RUN apt-get install nano
|
|
|
|
|
|
|
|
|
|
And then in the shell:
|
|
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
docker build -t my_cool_image . ## Builds the dockcross image.
|
|
|
|
|
docker run my_cool_image > linux-armv7 ## Creates a helper script named linux-armv7.
|
|
|
|
|
chmod +x linux-armv7 ## Gives the script execution permission.
|
|
|
|
|
./linux-armv7 bash ## Runs the helper script with the argument "bash", which starts an interactive container using your extended image.
|
2021-06-29 16:44:11 +02:00
|
|
|
|
2021-06-29 17:30:05 +02:00
|
|
|
## What is the difference between [dockcross]{.title-ref} and [dockbuild]{.title-ref} ?
|
2021-06-29 16:44:11 +02:00
|
|
|
|
|
|
|
|
The key difference is that
|
|
|
|
|
[dockbuild](https://github.com/dockbuild/dockbuild#readme) images do
|
|
|
|
|
**NOT** provide a [toolchain
|
|
|
|
|
file](https://cmake.org/cmake/help/latest/manual/cmake-toolchains.7.html)
|
|
|
|
|
but they use the same method to conveniently isolate the build
|
|
|
|
|
environment as
|
|
|
|
|
[dockcross](https://github.com/dockcross/dockcross#readme).
|
|
|
|
|
|
|
|
|
|
[dockbuild]{.title-ref} is used to build binaries for Linux x86_64 /
|
|
|
|
|
amd64 that will work across most Linux distributions.
|
|
|
|
|
[dockbuild]{.title-ref} performs a native Linux build where the host
|
|
|
|
|
build system is a Linux x86_64 / amd64 Docker image (so that it can be
|
|
|
|
|
used for building binaries on any system which can run Docker images)
|
|
|
|
|
and the target runtime system is Linux x86_x64 / amd64.
|
|
|
|
|
|
|
|
|
|
[dockcross]{.title-ref} is used to build binaries for many different
|
|
|
|
|
platforms. [dockcross]{.title-ref} performs a cross compilation where
|
|
|
|
|
the host build system is a Linux x86_64 / amd64 Docker image (so that it
|
|
|
|
|
can be used for building binaries on any system which can run Docker
|
|
|
|
|
images) and the target runtime system varies.
|
|
|
|
|
|
|
|
|
|
\-\--
|
|
|
|
|
|
|
|
|
|
Credits go to
|
|
|
|
|
[sdt/docker-raspberry-pi-cross-compiler](https://github.com/sdt/docker-raspberry-pi-cross-compiler),
|
|
|
|
|
who invented the base of the **dockcross** script.
|
