another script to build llvm clang and friends

build-llvm-clang.bash

#!/bin/bash
# because building llvm/clang docs are bad (based on someone's blog post)
# don't forget commonly missed pre-reqs:
#  - ncurses-devel, libxml2-devel, python, cmake, libedit-devel
version=5.0.1
base="llvm"
bits="cfe libcxx libcxxabi libunwind lldb clang-tools-extra"

echo -n "fetching "
for part in ${base} ${bits} ; do
  xzfile=${part}-${version}.src.tar.xz
  echo -n "${part}["
  wget -qt inf -c https://releases.llvm.org/${version}/${xzfile}
  echo -n "d"
  tar xJf ${xzfile}
  echo "x]"
  echo -n "         "
done

echo ""
echo "download and untars complete"
sleep 5

ztop=${base}-${version}.src
echo TOP=$ztop
echo "Getting ready to build ... organizing ..."

mv -v cfe-${version}.src                 ${ztop}/tools/clang
mv -v clang-tools-extra-${version}.src   ${ztop}/tools/clang/tools/extra
mv -v libcxx-${version}.src              ${ztop}/projects/libcxx
mv -v libcxxabi-${version}.src           ${ztop}/projects/libcxxabi
mv -v libunwind-${version}.src           ${ztop}/projects/libunwind
mv -v lldb-${version}.src                ${ztop}/tools/lldb

echo "src re-org complete"
sleep 5

#
# configure and build
#
pyinc=$(python -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())")
pylib=$(python -c "import distutils.sysconfig as sysconfig; print(sysconfig.get_config_var('LIBDIR'))")

echo "doing all the builds..."
echo ""
mkdir ${ztop}/build
cd    ${ztop}/build
cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release          \
      -DCMAKE_INSTALL_PREFIX=/opt/px                          \
      -DPYTHON_INCLUDE_DIR=${pyinc} -DPYTHON_LIBRARY=${pylib} \
      -DLLVM_TARGETS_TO_BUILD=X86 ..

make -j 4
make install

echo "build complete"