build: add build script for automated building

src/build.sh

@@ -0,0 +1,366 @@
+#!/bin/bash
+
+function set_compliation_variables() {
+    # Set compilation variables such as which compiler to use.
+    #
+    # Parameters:
+    # $1: target architecture
+    #
+    # Returns:
+    # 0: success
+    # 1: failure
+    supported_archs=("arm" "aarch64" "powerpc" "x86_64")
+
+    local target_arch="$1"
+
+    if [[ ! " ${supported_archs[@]} " =~ " ${target_arch} " ]]; then
+        >&2 echo "Error: unsupported target architecture: $target_arch"
+        return 1
+    fi
+
+    if [[ "$target_arch" == "arm" ]]; then
+        CROSS=arm-linux-gnueabi-
+        export HOST=arm-linux-gnueabi
+    elif [[ "$target_arch" == "aarch64" ]]; then
+        CROSS=aarch64-linux-gnu-
+        export HOST=aarch64-linux-gnu
+    elif [[ "$target_arch" == "powerpc" ]]; then
+        CROSS=powerpc-linux-gnu-
+        export HOST=powerpc-linux-gnu
+    elif [[ "$target_arch" == "x86_64" ]]; then
+        CROSS=""
+        export HOST=x86_64-linux-gnu
+    fi
+
+    export CC="${CROSS}gcc"
+    export CXX="${CROSS}g++"
+
+    export CFLAGS="-O2"
+    export CXXFLAGS="-O2"
+}
+
+function build_iconv() {
+    # Build libiconv.
+    #
+    # Parameters:
+    # $1: iconv package directory
+    # $2: target architecture
+    #
+    # Echoes:
+    # The libiconv build directory
+    #
+    # Returns:
+    # 0: success
+    # 1: failure
+
+    local iconv_dir="$1"
+    local target_arch="$2"
+    local iconv_build_dir="$(realpath "$iconv_dir/build-$target_arch")"
+
+    echo "$iconv_build_dir"
+    mkdir -p "$iconv_build_dir"
+
+    if [[ -f "$iconv_build_dir/lib/.libs/libiconv.a" ]]; then
+        >&2 echo "Skipping build: iconv already built for $target_arch"
+        return 0
+    fi
+
+    pushd "$iconv_build_dir" > /dev/null
+
+    ../configure --enable-static "CC=$CC" "CXX=$CXX" "--host=$HOST" \
+        "CFLAGS=$CFLAGS" "CXXFLAGS=$CXXFLAGS" 1>&2
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    make -j$(nproc) 1>&2
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    cp -r ./include ./lib/.libs/
+    mkdir -p ./lib/.libs/lib/
+    cp ./lib/.libs/libiconv.a ./lib/.libs/lib/
+
+    popd > /dev/null
+}
+
+function build_libgmp() {
+    # Build libgmp.
+    #
+    # Parameters:
+    # $1: libgmp package directory
+    # $2: target architecture
+    #
+    # Echoes:
+    # The libgmp build directory
+    #
+    # Returns:
+    # 0: success
+    # 1: failure
+
+    local gmp_dir="$1"
+    local target_arch="$2"
+    local gmp_build_dir="$(realpath "$gmp_dir/build-$target_arch")"
+
+    echo "$gmp_build_dir"
+    mkdir -p "$gmp_build_dir"
+
+    if [[ -f "$gmp_build_dir/.libs/lib/libgmp.a" ]]; then
+        >&2 echo "Skipping build: libgmp already built for $target_arch"
+        return 0
+    fi
+
+    pushd "$gmp_build_dir" > /dev/null
+
+    ../configure --enable-static "CC=$CC" "CXX=$CXX" "--host=$HOST" \
+        "CFLAGS=$CFLAGS" "CXXFLAGS=$CXXFLAGS" 1>&2
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    make -j$(nproc) 1>&2
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    mkdir -p ./.libs/include/
+    cp gmp.h ./.libs/include/
+    mkdir -p ./.libs/lib/
+    cp ./.libs/libgmp.a ./.libs/lib/
+
+    popd > /dev/null
+}
+
+function build_libmpfr() {
+    # Build libmpfr.
+    #
+    # Parameters:
+    # $1: mpfr package directory
+    # $2: libgmp build directory
+    # $3: target architecture
+    #
+    # Echoes:
+    # The libmpfr build directory
+    #
+    # Returns:
+    # 0: success
+    # 1: failure
+
+    local mpfr_dir="$1"
+    local libgmp_build_dir="$2"
+    local target_arch="$3"
+    local mpfr_build_dir="$(realpath "$mpfr_dir/build-$target_arch")"
+
+    mkdir -p "$mpfr_build_dir"
+    echo "$mpfr_build_dir"
+
+    if [[ -f "$mpfr_build_dir/src/.libs/lib/libmpfr.a" ]]; then
+        >&2 echo "Skipping build: libmpfr already built for $target_arch"
+        return 0
+    fi
+
+    pushd "$mpfr_dir/build-$target_arch" > /dev/null
+
+    ../configure --enable-static "--with-gmp-build=$libgmp_build_dir" \
+        "CC=$CC" "CXX=$CXX" "--host=$HOST" \
+        "CFLAGS=$CFLAGS" "CXXFLAGS=$CXXFLAGS" 1>&2
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    make -j$(nproc) 1>&2
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    mkdir -p ./src/.libs/include
+    cp ../src/mpfr.h ./src/.libs/include/
+    mkdir -p ./src/.libs/lib
+    cp ./src/.libs/libmpfr.a ./src/.libs/lib/
+
+    popd > /dev/null
+}
+
+function build_gdb() {
+    # Configure and build gdb.
+    #
+    # Parameters:
+    # $1: gdb directory
+    # $2: target architecture
+    # $3: libiconv prefix
+    # $4: libgmp prefix
+    # $5: libmpfr prefix
+    #
+    # Echoes:
+    # The gdb build directory
+    #
+    # Returns:
+    # 0: success
+    # 1: failure
+
+    local gdb_dir="$1"
+    local target_arch="$2"
+    local libiconv_prefix="$3"
+    local libgmp_prefix="$4"
+    local libmpfr_prefix="$5"
+    local gdb_build_dir="$(realpath "$gdb_dir/build-$target_arch")"
+
+    echo "$gdb_build_dir"
+    mkdir -p "$gdb_build_dir"
+
+    if [[ -f "$gdb_build_dir/gdb/gdb" ]]; then
+        >&2 echo "Skipping build: gdb already built for $target_arch"
+        return 0
+    fi
+
+    pushd "$gdb_build_dir" > /dev/null
+
+    ../configure --enable-static --with-static-standard-libraries --disable-tui --disable-inprocess-agent \
+                 "--with-libiconv-prefix=$libiconv_prefix" --with-libiconv-type=static \
+                 "--with-gmp=$libgmp_prefix" \
+                 "--with-mpfr=$libmpfr_prefix" \
+                 "CC=$CC" "CXX=$CXX" "--host=$HOST" \
+                 "CFLAGS=$CFLAGS" "CXXFLAGS=$CXXFLAGS" 1>&2
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    make -j$(nproc) 1>&2
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    popd > /dev/null
+}
+
+function install_gdb() {
+    # Install gdb binaries to an artifacts directory.
+    #
+    # Parameters:
+    # $1: gdb build directory
+    # $2: artifacts directory
+    # $3: target architecture
+    #
+    # Returns:
+    # 0: success
+    # 1: failure
+
+    local gdb_build_dir="$1"
+    local artifacts_dir="$2"
+    local target_arch="$3"
+
+    if [[ -d "$artifacts_dir/$target_arch" && -n "$(ls -A "$artifacts_dir/$target_arch")" ]]; then
+        >&2 echo "Skipping install: gdb already installed for $target_arch"
+        return 0
+    fi
+
+    temp_artifacts_dir="$(mktemp -d)"
+
+    mkdir -p "$artifacts_dir/$target_arch"
+
+    make -C "$gdb_build_dir" install "DESTDIR=$temp_artifacts_dir" 1>&2
+    if [[ $? -ne 0 ]]; then
+        rm -rf "$temp_artifacts_dir"
+        return 1
+    fi
+
+    while read file; do
+        cp "$file" "$artifacts_dir/$target_arch/"
+    done < <(find "$temp_artifacts_dir/usr/local/bin" -type f -executable)
+
+    rm -rf "$temp_artifacts_dir"
+}
+
+function build_and_install_gdb() {
+    # Build gdb and install it to an artifacts directory.
+    #
+    # Parameters:
+    # $1: gdb package directory
+    # $2: libiconv prefix
+    # $3: libgmp prefix
+    # $4: libmpfr prefix
+    # $5: install directory
+    # $6: target architecture
+    #
+    # Returns:
+    # 0: success
+    # 1: failure
+
+    local gdb_dir="$1"
+    local libiconv_prefix="$2"
+    local libgmp_prefix="$3"
+    local libmpfr_prefix="$4"
+    local artifacts_dir="$5"
+    local target_arch="$6"
+
+    gdb_build_dir="$(build_gdb "$gdb_dir" "$target_arch" "$libiconv_prefix" "$libgmp_prefix" "$libmpfr_prefix")"
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    install_gdb "$gdb_build_dir" "$artifacts_dir" "$target_arch"
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+}
+
+function build_gdb_with_dependencies() {
+    # Build gdb for a specific target architecture.
+    #
+    # Parameters:
+    # $1: target architecture
+    # $2: build directory
+
+    local target_arch="$1"
+    local build_dir="$2"
+    local packages_dir="$build_dir/packages"
+    local artifacts_dir="$build_dir/artifacts"
+
+    set_compliation_variables "$target_arch"
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    mkdir -p "$packages_dir"
+
+    iconv_build_dir="$(build_iconv "$packages_dir/libiconv" "$target_arch")"
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    gmp_build_dir="$(build_libgmp "$packages_dir/gmp" "$target_arch")"
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    mpfr_build_dir="$(build_libmpfr "$packages_dir/mpfr" "$gmp_build_dir" "$target_arch")"
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+
+    build_and_install_gdb "$packages_dir/gdb" \
+                      "$iconv_build_dir/lib/.libs/" \
+                      "$gmp_build_dir/.libs/" \
+                      "$mpfr_build_dir/src/.libs/" \
+                      "$artifacts_dir" \
+                      "$target_arch"
+    if [[ $? -ne 0 ]]; then
+        return 1
+    fi
+}
+
+function main() {
+    if [[ $# -ne 3 ]]; then
+        >&2 echo "Usage: $0 <target_arch> <build_dir>"
+        exit 1
+    fi
+
+    build_gdb_with_dependencies "$1" "$2"
+    if [[ $? -ne 0 ]]; then
+        >&2 echo "Error: failed to build gdb with dependencies"
+        exit 1
+    fi
+}
+
+main "$@"