feat(runtime): native platform backends and UI vessels onto main
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#!/usr/bin/env bash
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# build-sdl2.sh — Compile and run native-hello on macOS using the SDL2 backend.
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#
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# Usage:
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# ./build-sdl2.sh # compile and run
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# ./build-sdl2.sh compile # compile only
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# ./build-sdl2.sh clean # remove build artefacts
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#
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# Requirements:
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# - elc in PATH (or ../../../lang/dist/platform/elc)
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# - SDL2, SDL2_ttf, SDL2_image via Homebrew (brew install sdl2 sdl2_ttf sdl2_image)
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# - clang (Xcode Command Line Tools)
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# - macOS 12+
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#
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# This is the SDL2 counterpart to build.sh (AppKit). The pipeline is identical;
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# only the platform bridge object and compile flags differ:
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# - el_sdl2.c instead of el_appkit.m
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# - -DEL_TARGET_SDL2 instead of -DEL_TARGET_MACOS
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# - sdl2-config --libs -lSDL2_ttf -lSDL2_image -ldl instead of -framework Cocoa
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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EL_LANG_ROOT="${SCRIPT_DIR}/../../../lang"
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EL_UI_ROOT="${SCRIPT_DIR}/../.."
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EL_RUNTIME="${EL_LANG_ROOT}/el-compiler/runtime"
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EL_NATIVE_VESSEL="${EL_UI_ROOT}/vessels/el-native/src/main.el"
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BUILD_DIR="${SCRIPT_DIR}/build"
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# Locate elc
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if command -v elc &>/dev/null; then
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ELC="elc"
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elif [ -x "${EL_LANG_ROOT}/dist/platform/elc" ]; then
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ELC="${EL_LANG_ROOT}/dist/platform/elc"
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else
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echo "Error: elc not found. Add it to PATH or place it at:"
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echo " ${EL_LANG_ROOT}/dist/platform/elc"
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exit 1
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fi
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# Verify SDL2 is available
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if ! command -v sdl2-config &>/dev/null; then
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echo "Error: sdl2-config not found. Install SDL2 via:"
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echo " brew install sdl2 sdl2_ttf sdl2_image"
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exit 1
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fi
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SDL2_CFLAGS=$(sdl2-config --cflags)
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SDL2_LIBS=$(sdl2-config --libs)
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CLANG_FLAGS_COMMON=(
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-std=c11
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-DEL_TARGET_SDL2
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-I "${EL_RUNTIME}"
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)
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clean() {
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rm -rf "${BUILD_DIR}"
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echo "Cleaned."
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}
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compile() {
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mkdir -p "${BUILD_DIR}"
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# ── 1. Vessel forward-declarations header ─────────────────────────────────
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echo "==> Generating el-native vessel header (declarations only)..."
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"${ELC}" --emit-header "${EL_NATIVE_VESSEL}" \
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| awk 'BEGIN{in_body=0} /^[a-zA-Z_].+\)[[:space:]]*\{/ {in_body=1} !in_body{print}' \
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> "${BUILD_DIR}/el_native_vessel.h"
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# ── 2. Compile el-native vessel to C ──────────────────────────────────────
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echo "==> Compiling el-native vessel to C..."
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"${ELC}" "${EL_NATIVE_VESSEL}" \
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> "${BUILD_DIR}/el_native_vessel.c"
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# ── 3. Compile app entry to C ─────────────────────────────────────────────
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echo "==> Compiling app entry to C..."
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EL_MANIFEST="${SCRIPT_DIR}/manifest.el" \
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"${ELC}" "${SCRIPT_DIR}/src/main.el" \
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> "${BUILD_DIR}/native_hello.c"
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# ── 4. Compile el_sdl2.c (SDL2 bridge — pure C) ───────────────────────────
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# sdl2-config --cflags gives -I/opt/homebrew/include/SDL2 which handles
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# #include <SDL.h> but el_sdl2.c uses #include <SDL2/SDL.h> — also add
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# the parent directory so both forms resolve.
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echo "==> Compiling el_sdl2.c (SDL2 bridge)..."
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clang \
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-std=c11 \
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-DEL_TARGET_SDL2 \
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${SDL2_CFLAGS} \
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-I/opt/homebrew/include \
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-I "${EL_RUNTIME}" \
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-c "${EL_RUNTIME}/el_sdl2.c" \
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-o "${BUILD_DIR}/el_sdl2.o"
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# ── 5a. Compile el_seed.c ─────────────────────────────────────────────────
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echo "==> Compiling el_seed.c..."
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clang "${CLANG_FLAGS_COMMON[@]}" \
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-c "${EL_RUNTIME}/el_seed.c" \
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-o "${BUILD_DIR}/el_seed.o"
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# ── 5b. Compile el_runtime.c and patch out duplicate __-prefixed symbols ──
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echo "==> Compiling el_runtime.c..."
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clang "${CLANG_FLAGS_COMMON[@]}" \
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-c "${EL_RUNTIME}/el_runtime.c" \
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-o "${BUILD_DIR}/el_runtime.o"
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echo "==> Patching el_runtime.o (hiding __-prefixed symbols duplicated in el_seed.o)..."
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nm "${BUILD_DIR}/el_seed.o" 2>/dev/null \
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| awk '/^[0-9a-f]+ T _/{print $3}' | sort > "${BUILD_DIR}/.seed_T.txt"
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nm "${BUILD_DIR}/el_runtime.o" 2>/dev/null \
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| awk '/^[0-9a-f]+ T _/{print $3}' | sort > "${BUILD_DIR}/.rt_T.txt"
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comm -23 "${BUILD_DIR}/.rt_T.txt" "${BUILD_DIR}/.seed_T.txt" \
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> "${BUILD_DIR}/.rt_keep.txt"
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nmedit -s "${BUILD_DIR}/.rt_keep.txt" "${BUILD_DIR}/el_runtime.o"
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# ── 6. Compile el-native vessel object ────────────────────────────────────
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echo "==> Compiling el-native vessel object..."
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clang "${CLANG_FLAGS_COMMON[@]}" \
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-include "${EL_RUNTIME}/el_native_target.h" \
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-c "${BUILD_DIR}/el_native_vessel.c" \
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-o "${BUILD_DIR}/el_native_vessel.o"
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echo "==> Patching el_native_vessel.o (hiding vessel main)..."
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nm "${BUILD_DIR}/el_native_vessel.o" 2>/dev/null \
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| awk '/^[0-9a-f]+ T _/{print $3}' \
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| grep -v '^_main$' \
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> "${BUILD_DIR}/.vessel_keep.txt"
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nmedit -s "${BUILD_DIR}/.vessel_keep.txt" "${BUILD_DIR}/el_native_vessel.o"
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# ── 7. Compile app object ─────────────────────────────────────────────────
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echo "==> Compiling app object..."
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clang "${CLANG_FLAGS_COMMON[@]}" \
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-include "${EL_RUNTIME}/el_native_target.h" \
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-include "${BUILD_DIR}/el_native_vessel.h" \
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-c "${BUILD_DIR}/native_hello.c" \
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-o "${BUILD_DIR}/native_hello.o"
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# ── 8. Link ───────────────────────────────────────────────────────────────
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echo "==> Linking native-hello-sdl2..."
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clang "${CLANG_FLAGS_COMMON[@]}" \
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${SDL2_LIBS} \
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-lSDL2_ttf \
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-lSDL2_image \
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-lcurl \
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-ldl \
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-lpthread \
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"${BUILD_DIR}/native_hello.o" \
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"${BUILD_DIR}/el_native_vessel.o" \
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"${BUILD_DIR}/el_sdl2.o" \
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"${BUILD_DIR}/el_runtime.o" \
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"${BUILD_DIR}/el_seed.o" \
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-o "${BUILD_DIR}/native-hello-sdl2"
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echo "==> Build complete: ${BUILD_DIR}/native-hello-sdl2"
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}
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run() {
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compile
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echo "==> Launching native-hello-sdl2..."
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EL_MANIFEST="${SCRIPT_DIR}/manifest.el" \
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"${BUILD_DIR}/native-hello-sdl2"
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}
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case "${1:-run}" in
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clean) clean ;;
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compile) compile ;;
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run|*) run ;;
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esac
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