100 lines
3.9 KiB
Docker
100 lines
3.9 KiB
Docker
FROM --platform=linux/arm64 ubuntu:22.04
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# GTK4 + SDL2 for Raspberry Pi (ARM64 / aarch64)
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# Targets Pi 3 / 4 / 5 running 64-bit Raspberry Pi OS or Ubuntu 22.04.
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#
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# GTK4 requires a desktop environment / Wayland compositor at runtime.
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# SDL2 works on bare framebuffer or KMS/DRM without a full desktop.
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#
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# Usage:
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# docker build --platform linux/arm64 \
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# -f Dockerfile.pi --tag el-native-pi-arm64 ./build-docker/
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# docker create --name pi-extract el-native-pi-arm64
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# docker cp pi-extract:/build/native-hello-linux-pi ./build/native-hello-pi-arm64
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# docker rm pi-extract
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#
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# The GTK4 build is the default. SDL2 is available as an alternative
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# for headless / bare-metal Pi deployments.
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RUN apt-get update && apt-get install -y \
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build-essential \
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libgtk-4-dev \
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libsdl2-dev \
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libsdl2-ttf-dev \
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libsdl2-image-dev \
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pkg-config \
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libcurl4-openssl-dev \
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binutils \
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file \
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&& rm -rf /var/lib/apt/lists/*
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WORKDIR /build
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# All sources arrive in /build
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COPY runtime/ runtime/
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COPY el_native_vessel.c el_native_vessel.h native_hello.c ./
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# ── GTK4 build ────────────────────────────────────────────────────────────────
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# Compile el_gtk4.c
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RUN gcc -DEL_TARGET_LINUX $(pkg-config --cflags gtk4) \
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-std=c11 -I/build/runtime \
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-c /build/runtime/el_gtk4.c -o /build/el_gtk4.o && \
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echo "el_gtk4.c compiled OK"
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# Compile el_seed.c
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RUN gcc -DEL_TARGET_LINUX $(pkg-config --cflags gtk4) \
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-std=c11 -I/build/runtime \
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-c /build/runtime/el_seed.c -o /build/el_seed.o && \
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echo "el_seed.c compiled OK"
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# Compile el_runtime.c
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RUN gcc -std=c11 -I/build/runtime \
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-c /build/runtime/el_runtime.c -o /build/el_runtime.o && \
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echo "el_runtime.c compiled OK"
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# Patch el_runtime.o: localise __-prefixed duplicate symbols (el_seed.o is canonical)
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RUN nm /build/el_seed.o | awk '/[0-9a-f]+ T /{print $3}' | sort > /build/.seed_T.txt && \
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nm /build/el_runtime.o | awk '/[0-9a-f]+ T /{print $3}' | sort > /build/.rt_T.txt && \
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comm -12 /build/.seed_T.txt /build/.rt_T.txt > /build/.dups.txt && \
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if [ -s /build/.dups.txt ]; then \
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ARGS=$(awk '{printf "--localize-symbol=%s ", $1}' /build/.dups.txt); \
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eval "objcopy $ARGS /build/el_runtime.o"; \
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echo "Patched $(wc -l < /build/.dups.txt) duplicate symbols in el_runtime.o"; \
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fi
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# Compile vessel
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RUN gcc -DEL_TARGET_LINUX -std=c11 -I/build/runtime \
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-include /build/runtime/el_native_target.h \
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-c /build/el_native_vessel.c -o /build/el_native_vessel.o && \
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echo "vessel compiled OK"
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# Compile app
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RUN gcc -DEL_TARGET_LINUX -std=c11 -I/build/runtime \
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-include /build/runtime/el_native_target.h \
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-include /build/el_native_vessel.h \
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-c /build/native_hello.c -o /build/native_hello.o && \
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echo "app compiled OK"
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# Patch el_native_vessel.o: localise shared globals (main + TOKEN_* etc.)
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RUN nm /build/native_hello.o | awk '/[0-9a-f]+ [TBb] /{print $3}' | sort > /build/.app_syms.txt && \
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nm /build/el_native_vessel.o | awk '/[0-9a-f]+ [TBb] /{print $3}' | sort > /build/.vessel_syms.txt && \
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comm -12 /build/.app_syms.txt /build/.vessel_syms.txt > /build/.vessel_dups.txt && \
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echo "main" >> /build/.vessel_dups.txt && \
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sort -u /build/.vessel_dups.txt -o /build/.vessel_dups.txt && \
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ARGS=$(awk '{printf "--localize-symbol=%s ", $1}' /build/.vessel_dups.txt) && \
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eval "objcopy $ARGS /build/el_native_vessel.o" && \
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echo "Patched $(wc -l < /build/.vessel_dups.txt) symbols in el_native_vessel.o"
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# Link (GTK4)
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RUN gcc \
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/build/native_hello.o \
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/build/el_native_vessel.o \
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/build/el_gtk4.o \
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/build/el_runtime.o \
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/build/el_seed.o \
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$(pkg-config --libs gtk4) -ldl -lpthread -lcurl -lm \
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-o /build/native-hello-linux-pi && \
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echo "==> Linked: native-hello-linux-pi (GTK4)" && \
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file /build/native-hello-linux-pi
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