Script to build any version of GCC (since 3.4.x)

build_gcc_versions.sh

#!/bin/bash -ex

set -e

# baseurl=ftp://ftp.mirrorservice.org/sites/sourceware.org/pub/
baseurl=ftp://sourceware.org/pub/

fetch() {
  local ver=$1
  local path=$( [[ $ver == ?.?.? ]] && echo releases/gcc-$ver || echo snapshots/$ver )
  local file=gcc-${2:+$2-}$ver.tar.gz
  [ -f $file ] || wget $baseurl/gcc/$path/$file
  tar xf $file
  #for p in $patches
  #do
  #  ( cd gcc-$ver && curl "https://gcc.gnu.org/git/?p=gcc.git;a=patch;h=$p" | filterdiff -x '*/ChangeLog' | patch -p1 )
  #done
}

fetch_src() {
  local ver=$1
  shift
  [ -d gcc-$ver ] && return
  for src in """$@"
  do
    fetch $ver $src
  done
}

buildgcc() {
  local ver=$1
  shift
  rm -rf build.$ver
  mkdir build.$ver
  cd build.$ver
  STAGE1_CFLAGS="-O2 -g" ../gcc-$ver/configure --prefix=$HOME/gcc/$ver --with-system-zlib --with-gnu-ld --with-gnu-as --enable-libstdcxx-debug --disable-libitm --disable-libquadmath --disable-libmudflap --disable-libvtv --disable-libcilkrts --enable-languages=c,c++ "$@"
  make -j ${MAKEJOBS:-2} # STAGE1_CFLAGS="-O2 -g -std=gnu89" STAGE1_CXXFLAGS="-O2 -g -std=gnu++98"
  make install
  cd ..
  [[ $CLEAN ]] && rm -r build.$ver gcc-$ver
  # Create link from x.y to x.y.0
  if [[ $ver == *.[1-9].0 ]] && (( ${ver%.[1-9].0} >= 5 ))
  then
    test -e ~/gcc/${ver%.0} || ln -s $ver ~/gcc/${ver%.0}
  fi
}


# 6.{2,1}.0 5.{4,3,2,1}.0 4.9.{4,3,2,1,0}  4.8.{5,4,3,2,1,0} 4.7.{4,3,2,1,0} 4.6.4 4.5.4 4.4.7

for ver
do
  config=
  case $ver in
    [12].*|3.3.*) echo "$0: ancient versions not supported" >&2 ; exit 1 ;;
    4.[0123456].*|3.*) fetch_src $ver core g++ ;;&
    4.[01234].*) sed -i 's/struct siginfo/siginfo_t/' gcc-$ver/gcc/config/i386/linux-unwind.h ;;&
    4.[2345678].*) config="MAKEINFO=missing" ;;&
    4.9.[0123]) patches='8c3fa311caa86f61b4e28d1563d1110b44340fb2' ;;&
    5.[123].*) patches='1e5f1089dec3af328fd03125d6778f666d0bd4e4' ;;&
    4.[789].*|[56789].*) fetch_src $ver ;;&
    4.8.*)
      sed -i 's/struct ucontext/ucontext_t/' gcc-$ver/libgcc/config/i386/linux-unwind.h
      sed -i '/<unistd.h>/a #include <signal.h>' gcc-$ver/libsanitizer/asan/asan_linux.cc
      sed -i 's/__res_state/struct &/' gcc-$ver/libsanitizer/tsan/tsan_platform_linux.cc
      ;;&
    # for ISL failures see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86724
  esac
  buildgcc $ver $config
done