configure

#!/bin/sh

set -e

if [ $# -ne 1 ]; then
    echo "Fatal. Exactly one argument is expected: a nickname for the architecture."
    echo "       Example:"
    echo "       ./configure my_arch"
    echo "       which will look for Make.my_arch in ./setup"
    exit 1
fi

root_path="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
echo root_path = $root_path

arg_arch="$1"

bld_path=${root_path}/build_${1}
echo bld_path = $bld_path
if test ! -d $bld_path; then
    mkdir -v $bld_path;
fi

setup_file=${root_path}/setup/Make.${arg_arch}
echo setup_file = $setup_file

CXX=$(grep -E "^CXX\s*=" $setup_file | tr -d ' ' | cut -d '=' -f 2)

# See row Adopt the File System TS for C++17
# at https://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#iso.2014.filesystemts
# and https://en.cppreference.com/w/cpp/compiler_support

LIBFS=""
if (test $CXX = "g++"); then
    MAJ=$($CXX -dumpversion | cut -d '.' -f 1)
    if [ "$MAJ" -lt "8" ]; then
        echo Fatal. GCC version not supported `$CXX -dumpversion`. Minimum major version required is 8.
        exit 1
    elif [ "$MAJ" -eq 8 ]; then
        LIBFS=-lstdc++fs
    fi
else
    echo what the hell
fi

if test ! -f $setup_file ; then
  echo
  echo Please create the configuration file $setup_file
  echo
  exit 1
fi

mkfile=${root_path}/Makefile
echo mkfile = $mkfile

if test -f $mkfile ; then
  rm $mkfile
fi

sed -e "s:EDIT_BUILDDIR:${bld_path}:" ${root_path}/Makefile.ext \
    | sed -e "s:EDIT_ARCH:${arg_arch}:" \
    | sed -e "s:EDIT_ROOTDIR:${root_path}:" \
    | sed -e "s:EDIT_SOURCEDIR:${root_path}/src:" \
    | sed -e "s:EDIT_LIBFS:${LIBFS}:" > $mkfile