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Renesas GCC Toolchains

The gcc-renesas.com webpage has good information on how to build the Renesas RX and RL78 toolchains, but the GCC versions used there are a little outdated. And in addition, some patches are applied.

So instead I tried to build the toolchains from scratch directly from the GNU sources, and also get the benefit of the newer GCC version 7 instead of GCC version 4.

My efforts were successful and I have automated it into a single script. Simply change the TARGET variable to build either RL78 or the RX toolchain. It installs everything into a separate directoy in /opt/ on the filesystem. Take a look:

#!/bin/bash
set -e

TARGET="rl78-elf"
#TARGET="rx-elf"
PREFIX="/opt/gcc-${TARGET}/"

export PATH="${PREFIX}bin:$PATH"

# 1) Prepare build directories:
if [ -d build ]; then
  echo "Old build directory detected, please remove it."
  exit 1
else
  mkdir -p build/autoconf
  mkdir -p build/binutils
  mkdir -p build/gcc
  mkdir -p build/gdb
  mkdir -p build/newlib
fi

# 2) Get sources:
if [ ! -d source ]; then
  mkdir source
  cd source
  wget "https://gnuftp.uib.no/autoconf/autoconf-2.64.tar.bz2"
  wget "https://gnuftp.uib.no/gcc/gcc-7.3.0/gcc-7.3.0.tar.xz"
  wget "https://gnuftp.uib.no/gdb/gdb-8.1.tar.xz"
  wget "https://gnuftp.uib.no/binutils/binutils-2.30.tar.xz"
  wget "ftp://sourceware.org/pub/newlib/newlib-2.5.0.tar.gz"
  tar -xvjf autoconf-2.64.tar.bz2
  tar -xvJf gcc-7.3.0.tar.xz
  tar -xvJf gdb-8.1.tar.xz
  tar -xvJf binutils-2.30.tar.xz
  tar -xvzf newlib-2.5.0.tar.gz
  cd ..
fi

# 3) Build autoconf:
cd build/autoconf
../../source/autoconf-2.64/configure --prefix=$PREFIX
make
sudo make install
cd ..

# 4) Build binutils:
cd binutils
../../source/binutils-2.30/configure --target=$TARGET --prefix=$PREFIX --enable-maintainer-mode --disable-nls --disable-werror
make
sudo make install
cd ..

# 5) Get gcc sources:
if [ ! -d ../source/gcc-7.3.0/gmp ]; then
  cd ../source/gcc-7.3.0
  ./contrib/download_prerequisites
  cd ../../build
fi

# 6) Build gcc (step 1):
cd gcc
../../source/gcc-7.3.0/configure --target=$TARGET --prefix=$PREFIX --enable-languages=c,c++ --disable-shared --with-newlib --enable-lto --disable-libstdcxx-pch --disable-nls --disable-werror
make all-gcc
sudo make install-gcc
cd ..

# 7) Build newlib:
cd newlib
../../source/newlib-2.5.0/configure --target=$TARGET --prefix=$PREFIX --disable-nls
make
sudo make install
cd ..

# 8) Build gdb:
cd gdb
../../source/gdb-8.1/configure --target=$TARGET --prefix=$PREFIX --disable-nls
make
sudo make install
cd ..

# 9) Build gcc (step 2):
cd gcc
make
sudo make install
          


Topic: Configuration, by Kjetil @ 03/03-2018, Article Link