tools/cross.sh

   1 #!/usr/bin/env bash
   2 ################################################################
   3 # A script to build a GNU GCC and Binutils cross-compiler
   4 # Based on https://wiki.osdev.org/GCC_Cross-Compiler
   5 #
   6 # Copyright (c) 2022, the Native authors.
   7 # SPDX-License-Identifier: BSD-2-Clause
   8 ################################################################
   9
  10 ################################################################
  11 # Configuration
  12 ################################################################
  13
  14 # Exit if there is an error
  15 set -e
  16
  17 # Target to use
  18 TARGET=x86_64-elf
  19
  20 # Versions to build
  21 # Always use the latest working version (test before updating)
  22 BUT_VER=2.39
  23 GCC_VER=12.2.0
  24
  25 # Tar file extension to use
  26 # Always use the one with the smallest file size (check when updating version)
  27 BUT_EXT=xz
  28 GCC_EXT=xz
  29
  30 # Multicore builds
  31 # Currrently automatic using nproc
  32 CORES=$(($(nproc) + 1))
  33 LOAD=$(nproc)
  34
  35 PREFIX="$(pwd)/cross"
  36 export PATH="$PREFIX/bin:$PATH"
  37
  38 echo "Building $TARGET Binutils $BUT_VER and GCC $GCC_VER..."
  39 echo "Cores: $CORES, load: $LOAD"
  40
  41 ################################################################
  42 # Source Tarballs
  43 ################################################################
  44
  45 BUT_TARBALL=binutils-$BUT_VER.tar.$BUT_EXT
  46 GCC_TARBALL=gcc-$GCC_VER.tar.$GCC_EXT
  47
  48 mkdir -p buildcc
  49 cd buildcc
  50
  51 # Download tarballs
  52 echo "Downloading Binutils tarball..."
  53 if [ ! -f $BUT_TARBALL ]; then
  54     wget https://ftp.gnu.org/gnu/binutils/$BUT_TARBALL
  55 fi
  56
  57 echo "Downloading GCC tarball..."
  58 if [ ! -f $GCC_TARBALL ]; then
  59     wget https://ftp.gnu.org/gnu/gcc/gcc-$GCC_VER/$GCC_TARBALL
  60 fi
  61
  62 # Unzip tarballs
  63 printf "%s" "Unzipping Binutils tarball"
  64 tar -xf $BUT_TARBALL --checkpoint=.400
  65 echo "" # Newline :~)
  66 printf "%s" "Unzipping GCC tarball"
  67 tar -xf $GCC_TARBALL --checkpoint=.400
  68
  69 ################################################################
  70 # Building
  71 ################################################################
  72
  73 echo "Removing old build directories..."
  74 rm -rf buildcc-gcc build-binutils
  75
  76 # Build binutils
  77 mkdir buildcc-binutils
  78 cd buildcc-binutils
  79 echo "Configuring Binutils..."
  80 ../binutils-$BUT_VER/configure --target=$TARGET --prefix="$PREFIX" --with-sysroot --disable-nls --disable-werror
  81 echo "Building Binutils..."
  82 make -j$CORES -l$LOAD
  83 echo "Installing Binutils..."
  84 make install -j$CORES -l$LOAD
  85 cd ..
  86
  87 # Build gcc
  88 cd gcc-$GCC_VER
  89 echo "Downloading prerequisites for GCC..."
  90 contrib/download_prerequisites
  91 cd ..
  92 mkdir buildcc-gcc
  93 cd buildcc-gcc
  94 echo "Configuring GCC..."
  95 ../gcc-$GCC_VER/configure --target=$TARGET --prefix="$PREFIX" --disable-nls --enable-languages=c --without-headers
  96 echo "Building all-gcc..."
  97 make all-gcc -j$CORES -l$LOAD
  98 echo "Building all-target-libgcc..."
  99 make all-target-libgcc -j$CORES -l$LOAD
 100 echo "Installing GCC..."
 101 make install-gcc -j$CORES -l$LOAD
 102 echo "Installing target-libgcc..."
 103 make install-target-libgcc -j$CORES -l$LOAD
 104 cd ../..
 105
 106 echo "Removing build directory..."
 107 rm -rf buildcc
 108
 109 echo "Build complete, binaries are in $PREFIX/bin"
 110
 111 ################################################################
 112 # Basic Testing (just prints info for now)
 113 ################################################################
 114
 115 echo "Testing GCC..."
 116 $TARGET-gcc -v
 117
 118 echo "Testing LD..."
 119 $TARGET-ld -v
 120
 121 echo "Done!"