configure

#!/bin/bash

if [ -z "${CC}" ]; then
    if [ -x "$(command -v gcc)" ]; then
        export CC=$(which gcc)
    elif [ -x "$(command -v clang)" ]; then
        export CC=$(which clang)
    else
        read -p "CC: " cc
        if ! [ -x "$(command -v ${cc})" ]; then
            echo "C compailer '${cc}' was not found." >&2
            exit 1
        fi
        export CC=$cc
    fi
fi
echo CC=$CC

if [ -z "${AR}" ]; then
    if [ -x "$(command -v ar)" ]; then
        export AR=$(which ar)
    else
        read -p "AR: " ar
        if [ -z "${ar}" ]; then
            echo "Warning: Archiver was not specified. Static library can't be created without it."
        elif [ -x "$(command -v ${ar})" ]; then
            echo "Archiver '${ar}' was not found." >&2
            exit 1
        fi
        export AR=$ar
    fi
fi
echo AR=$AR

prefix=$PREFIX
PREFIX_DEFAULT="/usr"
if [ -z "${prefix}" ]; then read -p "PREFIX: ($PREFIX_DEFAULT) " prefix; fi
if [ -z "${prefix}" ]; then prefix=$PREFIX_DEFAULT; fi
export PREFIX=$prefix
echo PREFIX=$PREFIX

if [ -z "${LD_LIBRARY_PATH}" ]; then
    export LD_LIBRARY_PATH=$PWD
elif ! [[ "$LD_LIBRARY_PATH" =~ (^|:)"$PWD"(:|$) ]]; then
    LD_LIBRARY_PATH="$PWD:$LD_LIBRARY_PATH"
fi
echo LD_LIBRARY_PATH=$LD_LIBRARY_PATH

echo Starting new bash session...
bash