feat: remove toolchain.sh in favor of Dockerfile

Dockerfile

@@ -1,10 +1,56 @@
-FROM rust:bookworm AS builder
+ARG TARGET=x86_64-hermit
+ARG PREFIX=/opt/hermit
 
+FROM --platform=$BUILDPLATFORM rust:bookworm AS kernel
+ADD --link https://github.com/hermit-os/kernel.git /kernel
+WORKDIR /kernel
+RUN cargo xtask build \
+    --artifact-dir . \
+    --arch x86_64 \
+    --release \
+    --no-default-features \
+    --features pci,smp,acpi,newlib,tcp,dhcpv4
+
+FROM buildpack-deps:bookworm AS binutils
+RUN set -eux; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+        bison \
+        flex \
+        texinfo \
+    ; \
+    rm -rf /var/lib/apt/lists/*;
+ADD --link https://github.com/hermit-os/binutils.git /binutils
+WORKDIR /binutils
+ENV CFLAGS="-w" \
+    CXXFLAGS="-w"
+ARG TARGET
+ARG PREFIX
+RUN set -eux; \
+    ./configure \
+        --target=$TARGET \
+        --prefix=$PREFIX \
+        --with-sysroot \
+        --disable-werror \
+        --disable-multilib \
+        --disable-shared \
+        --disable-nls \
+        --disable-gdb \
+        --disable-libdecnumber \
+        --disable-readline \
+        --disable-sim \
+        --enable-tls \
+        --enable-lto \
+        --enable-plugin; \
+    make -O -j$(nproc); \
+    make install; \
+    make clean
+
+FROM buildpack-deps:bookworm AS gcc
 RUN set -eux; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
         bison \
-        git \
         flex \
         libgmp-dev \
         libisl-dev \
@@ -13,13 +59,92 @@ RUN set -eux; \
         texinfo \
     ; \
     rm -rf /var/lib/apt/lists/*;
+ARG TARGET
+ARG PREFIX
+COPY --link --from=binutils $PREFIX $PREFIX
+ENV CFLAGS="-w" \
+    CXXFLAGS="-w" \
+    CFLAGS_FOR_TARGET="-fPIE -pie" \
+    GOFLAGS_FOR_TARGET="-fPIE -pie" \
+    FCFLAGS_FOR_TARGET="-fPIE -pie" \
+    FFLAGS_FOR_TARGET="-fPIE -pie" \
+    CXXFLAGS_FOR_TARGET="-fPIE -pie"
 
-WORKDIR /root/
-ADD ./toolchain.sh /root/toolchain.sh
-RUN ./toolchain.sh x86_64-hermit /opt/hermit
+ADD --link https://github.com/hermit-os/gcc.git /gcc
+WORKDIR /gcc/builddir-bootstrap
+RUN set -eux; \
+    ../configure \
+        --target=$TARGET \
+        --prefix=$PREFIX \
+        --without-headers \
+        --disable-multilib \
+        --with-isl \
+        --enable-languages=c,c++,lto \
+        --disable-nls \
+        --disable-shared \
+        --disable-libssp \
+        --disable-libgomp \
+        --enable-threads=posix \
+        --enable-tls \
+        --enable-lto \
+        --disable-symvers; \
+    make -O -j$(nproc) all-gcc; \
+    make install-gcc; \
+    make clean
+ENV PATH=$PREFIX/bin:$PATH
 
+COPY --link --from=kernel /kernel/libhermit.a /kernel/libhermit.a
+ENV LDFLAGS_FOR_TARGET="-L/kernel -lhermit"
+
+ADD --link https://github.com/hermit-os/newlib.git /newlib
+WORKDIR /newlib
+RUN set -eux; \
+    ./configure \
+        --target=$TARGET \
+        --prefix=$PREFIX \
+        --disable-shared \
+        --disable-multilib \
+        --enable-lto \
+        --enable-newlib-io-c99-formats \
+        --enable-newlib-multithread; \
+    make -O -j$(nproc); \
+    make install; \
+    make clean
+
+ADD --link https://github.com/hermit-os/pthread-embedded.git /pthread-embedded
+WORKDIR /pthread-embedded
+RUN set -eux; \
+    ./configure \
+        --target=$TARGET \
+        --prefix=$PREFIX; \
+    make -O -j$(nproc); \
+    make install; \
+    make clean
+
+WORKDIR /gcc/builddir
+RUN set -eux; \
+    ../configure \
+        --target=$TARGET \
+        --prefix=$PREFIX \
+        --with-newlib \
+        --with-isl \
+        --disable-multilib \
+        --without-libatomic \
+        --enable-languages=c,c++,fortran,lto \
+        --disable-nls \
+        --disable-shared \
+        --enable-libssp \
+        --enable-threads=posix \
+        --enable-libgomp \
+        --enable-tls \
+        --enable-lto \
+        --disable-symver; \
+    make -O -j$(nproc); \
+    make install; \
+    make clean
 
 FROM rust:bookworm AS toolchain
-COPY --from=builder /opt/hermit /opt/hermit
-ENV PATH=/opt/hermit/bin:$PATH \
-    LD_LIBRARY_PATH=/opt/hermit/lib:$LD_LIBRARY_PATH
+ARG PREFIX
+COPY --from=gcc $PREFIX $PREFIX
+ENV PATH=$PREFIX/bin:$PATH \
+    LD_LIBRARY_PATH=$PREFIX/lib:$LD_LIBRARY_PATH

README.md

@@ -1,30 +1,31 @@
 # hermit-gcc
 
-This repository contains scripts to build the cross-compiler for the Rust-based library OS [HermitCore](https://github.com/hermit-os/libhermit-rs).
+This repository provides an OCI image ([`ghcr.io/hermit-os/hermit-gcc`], [`Dockerfile`]) containing the GCC cross-compiler for the [Hermit Operating System].
 
-## Requirements
+[`ghcr.io/hermit-os/hermit-gcc`]: https://github.com/hermit-os/hermit-gcc/pkgs/container/hermit-gcc
+[`Dockerfile`]: Dockerfile
+[Hermit Operating System]: http://hermit-os.org
 
-The build process works currently only on **x86-based Linux** systems. The following software packets are required to build HermitCore's toolchain on a Linux system:
+## Available Components
 
-* Netwide Assembler (NASM)
-* GNU Make, GNU Binutils, cmake
-* Tools and libraries to build *linux*, *binutils* and *gcc* (e.g. flex, bison, MPFR library, ISL library, GMP library, MPC library)
-* Rust
+- [hermit-os/binutils](https://github.com/hermit-os/binutils)
+- [hermit-os/newlib](https://github.com/hermit-os/newlib)
+- [hermit-os/pthread-embedded](https://github.com/hermit-os/pthread-embedded)
+- [hermit-os/gcc](https://github.com/hermit-os/gcc)
 
-On Debian-based systems the packets can be installed by executing:
-```
-  sudo apt-get install cmake nasm libmpfr-dev libisl-dev libmpc-dev libgmp-dev flex bison
-```
-
-Note: If issues arise during the build, try using requirements.sh to check the versions of the necessary packets and the configuration of the LD_LIBRARY_PATH (it should contain the MPFR library, GMP library and MPC library).
+## Usage
 
-## Building the HermitCore's toolchain
+To compile Hermit applications using this image, you need a built [Hermit kernel] (`libhermit.a`).
+You can then compile applications like this:
 
-To build the toolchain just call the script as follow:
+[Hermit kernel]: https://github.com/hermit-os/kernel
 
 ```bash
-$ ./toolchain.sh x86_64-hermit /home/usr/hermit
+docker run --rm -v .:/mnt -w /mnt ghcr.io/hermit-os/hermit-gcc:latest x86_64-hermit-gcc -o app app.c libhermit.a
 ```
 
-The first argument of the script specifies the target architecture, where the second argument defines the path to the installation directory.
-To create the toolchain, write access to the installation directory is required.
+You can also use the image interactively:
+
+```bash
+docker run --rm -it -v .:/mnt -w /mnt ghcr.io/hermit-os/hermit-gcc:latest
+```