Create build-uno.sh

Made LTO to work

Author: beakthoven

build-uno.sh

@@ -0,0 +1,130 @@
+#!/usr/bin/env bash
+
+WORKING_DIR="$(pwd)"
+OUT_DIR="${WORKING_DIR}/out"
+
+rm -rf "$OUT_DIR" && mkdir "$OUT_DIR"
+
+COMMON_FLAGS=(
+    "-Wall"
+    "-Os"
+    "-ffunction-sections"
+    "-fdata-sections"
+    "-finline-functions"
+    "-flto=full"
+    "-fmerge-all-constants"
+    "-fshort-enums"
+    "-integrated-as"
+    "-fvisibility=hidden"
+)
+
+ARCH_FLAGS=(
+    "-mmcu=atmega328p"
+    "-DF_CPU=16000000L"
+    "-DARDUINO=10808"
+    "-DARDUINO_AVR_UNO"
+    "-DARDUINO_ARCH_AVR"
+)
+
+CPP_FLAGS=(
+    "-std=gnu++11"
+    "-fpermissive"
+    "-fno-threadsafe-statics"
+    "-fno-exceptions"
+    "-fno-rtti"
+)
+
+C_FLAGS=(
+    "-std=gnu11"
+    "-fno-fat-lto-objects"
+)
+
+AS_FLAGS=(
+    "-x"
+    "assembler-with-cpp"
+)
+
+#LINK_FLAGS
+
+#rm -rf sysroot
+#wget "https://github.com/ZakKemble/avr-gcc-build/releases/download/v14.1.0-1/avr-gcc-14.1.0-x64-linux.tar.bz2"
+#tar -xf avr-gcc-14.1.0-x64-linux.tar.bz2 && rm -rf avr-gcc-14.1.0-x64-linux.tar.bz2
+#mv avr-gcc-14.1.0-x64-linux sysroot
+SYSROOT_DIR="${WORKING_DIR}/sysroot"
+
+ARCH_FLAGS+=(
+    "--sysroot=${SYSROOT_DIR}"
+    "-I${SYSROOT_DIR}/avr/include"
+)
+
+#rm -rf "${WORKING_DIR}/core/arduino/avr"
+#git clone "https://github.com/ClangBuiltArduino/core_arduino-avr.git" "${WORKING_DIR}/core/arduino/avr" --depth=1
+AVR_CORE_DIR="${WORKING_DIR}/core/arduino/avr"
+
+ARCH_FLAGS+=(
+    "-I${AVR_CORE_DIR}/cores/arduino"
+    "-I${AVR_CORE_DIR}/variants/standard"
+)
+
+job_c() {
+    local variant="${1}"
+    local outfile="$(basename $2).o"
+    mkdir -p "${OUT_DIR}/${variant}"
+    echo "CC: ${OUT_DIR}/${variant}/${outfile}"
+
+    clang --target=avr "${ARCH_FLAGS[@]}" "${COMMON_FLAGS[@]}" "${C_FLAGS[@]}" -o "${OUT_DIR}/${variant}/${outfile}" -c "$2"
+}
+
+job_cpp() {
+    local variant="${1}"
+    local outfile="$(basename $2).o"
+    mkdir -p "${OUT_DIR}/${variant}"
+    echo "CPP: ${OUT_DIR}/${variant}/${outfile}"
+
+    local original_common_flags=("${COMMON_FLAGS[@]}")
+    if [[ $3 == "nolto" ]]; then
+        COMMON_FLAGS+=("-fno-lto")
+    fi
+    clang++ --target=avr "${ARCH_FLAGS[@]}" "${COMMON_FLAGS[@]}" "${CPP_FLAGS[@]}" -o "${OUT_DIR}/${variant}/${outfile}" -c "$2"
+    COMMON_FLAGS=("${original_common_flags[@]}")
+}
+
+job_s() {
+    local variant="${1}"
+    local outfile="$(basename $2).o"
+    mkdir -p "${OUT_DIR}/${variant}"
+    echo "CC: ${OUT_DIR}/${variant}/${outfile}"
+
+    clang --target=avr "${ARCH_FLAGS[@]}" "${COMMON_FLAGS[@]}" "${AS_FLAGS[@]}" -o "${OUT_DIR}/${variant}/${outfile}" -c "$2"
+}
+
+compile_and_link_core() {
+    for c_file in "${AVR_CORE_DIR}"/cores/arduino/*.c; do
+        if [[ -f "$c_file" ]]; then
+            job_c "core" "$c_file"
+        fi
+    done
+    for cpp_file in "${AVR_CORE_DIR}"/cores/arduino/*.cpp; do
+        if [[ -f "$cpp_file" ]]; then
+            if echo "$cpp_file" | grep -q "cores/arduino/HardwareSerial0.cpp"; then
+                echo "nolto: $cpp_file"
+                job_cpp "core" "$cpp_file" "nolto"
+            else
+                job_cpp "core" "$cpp_file"
+            fi
+        fi
+    done
+    for s_file in "${AVR_CORE_DIR}"/cores/arduino/*.S; do
+        if [[ -f "$s_file" ]]; then
+            job_s "core" "$s_file"
+        fi
+    done
+    llvm-ar rc "${OUT_DIR}/libArduinoCore.a" "${OUT_DIR}/core/"*
+    llvm-ranlib "${OUT_DIR}/libArduinoCore.a"
+}
+
+compile_and_link_core
+mkdir -p "${OUT_DIR}/main"
+job_cpp "main" "$(pwd)/main.cpp"
+
+clang++ --target=avr -v -o firmware.elf "${ARCH_FLAGS[@]}" -Os -Wl,--strip-debug -Wl,--plugin-opt=-import-instr-limit=5 -Wl,--print-gc-sections -flto=full -finline-functions -ffunction-sections -fdata-sections -fpermissive -fno-exceptions -fno-threadsafe-statics -fno-rtti -L"${SYSROOT_DIR}/lib" -Wl,--gc-sections "${OUT_DIR}/main/main.cpp.o" "${OUT_DIR}/libArduinoCore.a" -fuse-linker-plugin