Add CMake with toolchain file

Author: jbeyerstedt

.github/workflows/docker-push.yml

@@ -42,7 +42,8 @@ jobs:
       - name: Build and push Docker image
         uses: docker/build-push-action@v3
         with:
-          context: ${{ matrix.name }}
+          context: .
+          file: ${{ matrix.name }}/Dockerfile
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

Readme.md

@@ -6,12 +6,21 @@ Docker containers are pushed to the GitHub container registry (ghcr.io) by a bui
 All dockerfiles support these build tools:
 - GNU make
 - Python 3
+- CMake (with Ninja)
 
 To cross-compile something, mount the working directory to `/work` and run your make command like this:
 ```shell
 docker run --rm -v $(pwd):/work ghcr.io/considerit/cross-linux-armhf-debian11 make $target
 ```
 
+To cross-compile with CMake, a toolchain file is used which expects libraries in `$CROSS_SYSROOT/lib` and includes in `$CROSS_SYSROOT/include`.
+```shell
+# add -DCMAKE_TOOLCHAIN_FILE=/var/cross-sysroot/toolchain.cmake to your cmake call or use wrapper script on config step
+docker run --rm -v $(pwd):/work ghcr.io/considerit/cross-linux-armhf-debian11 cmake-cross -B ./build-armhf
+
+docker run --rm -v $(pwd):/work ghcr.io/considerit/cross-linux-armhf-debian11 cmake --build ./build-armhf
+```
+
 If you want to build the images yourself, run `docker build` on the individual dockerfiles like this:
 ```shell
 cd linux-gnueabihf-debian11

cmake-cross.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "cmake -DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOLCHAIN_FILE $@"
+cmake -DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOLCHAIN_FILE $@

linux-aarch64-debian11/Dockerfile

@@ -1,6 +1,7 @@
 FROM debian:11-slim
 
 ARG workdir=/work
+ENV CROSS_SYSROOT=/var/cross-sysroot
 
 # install basic utilities
 RUN apt update && apt -y install git rsync python3
@@ -12,6 +13,13 @@ RUN git config --global --add safe.directory $workdir
 RUN apt -y install g++-aarch64-linux-gnu
 
 # install basic build tools
-RUN apt -y install build-essential make ccache
+RUN apt -y install build-essential make ccache cmake ninja-build
+
+# setup CMake for cross-compiling
+RUN mkdir -p ${CROSS_SYSROOT}/include/
+RUN mkdir -p ${CROSS_SYSROOT}/lib/
+ENV CMAKE_TOOLCHAIN_FILE=${CROSS_SYSROOT}/toolchain.cmake
+COPY linux-aarch64-tc.cmake ${CMAKE_TOOLCHAIN_FILE}
+COPY cmake-cross.sh /usr/bin/cmake-cross
 
 WORKDIR $workdir

linux-aarch64-tc.cmake

@@ -0,0 +1,13 @@
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR aarch64)
+
+set(CMAKE_SYSROOT $ENV{CROSS_SYSROOT})
+set(cross_tripe "aarch64-linux-gnu")
+
+set(CMAKE_C_COMPILER ${cross_tripe}-gcc)
+set(CMAKE_CXX_COMPILER ${cross_tripe}-g++)
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)

linux-armhf-debian10/Dockerfile

@@ -1,6 +1,7 @@
 FROM debian:10-slim
 
 ARG workdir=/work
+ENV CROSS_SYSROOT=/var/cross-sysroot
 
 # install basic utilities
 RUN apt update && apt -y install git rsync python3
@@ -12,6 +13,13 @@ RUN git config --global --add safe.directory $workdir
 RUN apt -y install g++-arm-linux-gnueabihf
 
 # install basic build tools
-RUN apt -y install build-essential make ccache
+RUN apt -y install build-essential make ccache cmake ninja-build
+
+# setup CMake for cross-compiling
+RUN mkdir -p ${CROSS_SYSROOT}/include/
+RUN mkdir -p ${CROSS_SYSROOT}/lib/
+ENV CMAKE_TOOLCHAIN_FILE=${CROSS_SYSROOT}/toolchain.cmake
+COPY linux-armhf-tc.cmake ${CMAKE_TOOLCHAIN_FILE}
+COPY cmake-cross.sh /usr/bin/cmake-cross
 
 WORKDIR $workdir

linux-armhf-debian11/Dockerfile

@@ -1,6 +1,7 @@
 FROM debian:11-slim
 
 ARG workdir=/work
+ENV CROSS_SYSROOT=/var/cross-sysroot
 
 # install basic utilities
 RUN apt update && apt -y install git rsync python3
@@ -12,6 +13,13 @@ RUN git config --global --add safe.directory $workdir
 RUN apt -y install g++-arm-linux-gnueabihf
 
 # install basic build tools
-RUN apt -y install build-essential make ccache
+RUN apt -y install build-essential make ccache cmake ninja-build
+
+# setup CMake for cross-compiling
+RUN mkdir -p ${CROSS_SYSROOT}/include/
+RUN mkdir -p ${CROSS_SYSROOT}/lib/
+ENV CMAKE_TOOLCHAIN_FILE=${CROSS_SYSROOT}/toolchain.cmake
+COPY linux-armhf-tc.cmake ${CMAKE_TOOLCHAIN_FILE}
+COPY cmake-cross.sh /usr/bin/cmake-cross
 
 WORKDIR $workdir

linux-armhf-tc.cmake

@@ -0,0 +1,13 @@
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR armhf)
+
+set(CMAKE_SYSROOT $ENV{CROSS_SYSROOT})
+set(cross_tripe "arm-linux-gnueabihf")
+
+set(CMAKE_C_COMPILER ${cross_tripe}-gcc)
+set(CMAKE_CXX_COMPILER ${cross_tripe}-g++)
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)

linux-armhf-ubuntu18/Dockerfile

@@ -1,6 +1,7 @@
 FROM ubuntu:18.04
 
 ARG workdir=/work
+ENV CROSS_SYSROOT=/var/cross-sysroot
 
 # install basic utilities
 RUN apt update && apt -y install git rsync python3
@@ -12,6 +13,13 @@ RUN git config --global --add safe.directory $workdir
 RUN apt -y install g++-arm-linux-gnueabihf
 
 # install basic build tools
-RUN apt -y install build-essential make ccache
+RUN apt -y install build-essential make ccache cmake ninja-build
+
+# setup CMake for cross-compiling
+RUN mkdir -p ${CROSS_SYSROOT}/include/
+RUN mkdir -p ${CROSS_SYSROOT}/lib/
+ENV CMAKE_TOOLCHAIN_FILE=${CROSS_SYSROOT}/toolchain.cmake
+COPY linux-armhf-tc.cmake ${CMAKE_TOOLCHAIN_FILE}
+COPY cmake-cross.sh /usr/bin/cmake-cross
 
 WORKDIR $workdir