feat: added cross compiler and moved headers to include dir

mkbuildenv.sh

@@ -0,0 +1,126 @@
+#!/usr/bin/bash
+COMPILER_DIR="${PWD}/compiler"
+DOWNLOAD_DIR="${COMPILER_DIR}/download"
+SOURCES_DIR="${COMPILER_DIR}/sources"
+BUILD_DIR="${COMPILER_DIR}/build"
+
+GCC_VER=10.2.0
+GCC_TAR_FILE="gcc-${GCC_VER}.tar.xz"
+GCC_TAR_URL="https://ftp.gnu.org/gnu/gcc/gcc-${GCC_VER}/${GCC_TAR_FILE}"
+GCC_SOURCE="${SOURCES_DIR}/gcc-${GCC_VER}"
+GCC_BUILD="${BUILD_DIR}/gcc-${GCC_VER}"
+
+BINUTILS_VER=2.36
+BINUTILS_TAR_FILE="binutils-${BINUTILS_VER}.tar.xz"
+BINUTILS_TAR_URL="https://ftp.gnu.org/gnu/binutils/${BINUTILS_TAR_FILE}"
+BINUTILS_SOURCE="${SOURCES_DIR}/binutils-${BINUTILS_VER}"
+BINUTILS_BUILD="${BUILD_DIR}/binutils-${BINUTILS_VER}"
+
+TARGET_COMPILER="${COMPILER_DIR}/target"
+
+export MAKEFLAGS="-j$(nproc)"
+
+export PREFIX="${TARGET_COMPILER}"
+export TARGET=i686-elf
+export PATH="${PREFIX}/bin:${PATH}"
+
+function log() {
+  echo "$*"
+}
+
+function yes_or_no() {
+  while true; do
+    read -p "$* [y/n]: " yn
+    case $yn in
+    [Yy]*) return 0 ;;
+    [Nn]*)
+      echo "Aborted"
+      return 1
+      ;;
+    esac
+  done
+}
+
+function download() {
+  if [ -f "${DOWNLOAD_DIR}/$2" ]; then
+    log "Not downloading $2"
+    return 0
+  fi
+  log "Downloading $2"
+  curl -o "${DOWNLOAD_DIR}/$2" "$1"
+}
+
+function extract_source() {
+  if [ -d "$1" ]; then
+    log "already extracted $2, skipping"
+    return 0
+  fi
+  log "Extracting $2"
+  tar -C "${SOURCES_DIR}" -xf "${DOWNLOAD_DIR}/$2"
+}
+
+function ensure_dir() {
+  if [ ! -d "$1" ]; then
+    mkdir -p "$1"
+  fi
+}
+
+# Verify
+
+if [ -d "${COMPILER_DIR}" ]; then
+  if ! yes_or_no "Do you want to rebuild?"; then
+    exit 1
+  fi
+fi
+
+# Download sources
+ensure_dir "${COMPILER_DIR}"
+
+ensure_dir "${DOWNLOAD_DIR}"
+ensure_dir "${TARGET_COMPILER}"
+ensure_dir "${BUILD_DIR}"
+ensure_dir "${GCC_BUILD}"
+ensure_dir "${BINUTILS_BUILD}"
+
+download "${GCC_TAR_URL}" "${GCC_TAR_FILE}"
+download "${BINUTILS_TAR_URL}" "${BINUTILS_TAR_FILE}"
+
+extract_source "${GCC_SOURCE}" "${GCC_TAR_FILE}"
+extract_source "${BINUTILS_SOURCE}" "${BINUTILS_TAR_FILE}"
+
+# Build
+function build_binutils() {
+  pushd . || return 1
+  cd "${BINUTILS_BUILD}" || return 1
+  "${BINUTILS_SOURCE}/configure" --target=${TARGET} --prefix=${PREFIX} --with-sysroot --disable-nls --disable-werror || return 1
+  make || return 1
+  make install || return 1
+  popd || return 1
+  return 0
+}
+
+function build_gcc() {
+  if ! which -- "${TARGET}-as"; then
+    log "Could not find ${TARGET}-as!"
+    return 1
+  fi
+  pushd . || return 1
+  cd "${GCC_BUILD}" || return 1
+  "${GCC_SOURCE}/configure" --target=${TARGET} --prefix=${PREFIX} --disable-nls --enable-languages=c --without-headers || return 1
+  make all-gcc || return 1
+  make all-target-libgcc || return 1
+  make install-gcc || return 1
+  make install-target-libgcc || return 1
+  popd || return 1
+  return 0
+}
+
+if ! build_binutils; then
+  log "Failed to build binutils!"
+  exit 1
+fi
+
+if ! build_gcc; then
+  log "Failed to build binutils!"
+  exit 1
+fi