configure

#!/bin/sh

usage() {
    cat <<EOF
Usage: ./configure [OPTION]...

Defaults for the options are specified in brackets.

Configuration:
  -h, --help              display this help and exit

Installation directories:
  --prefix=PREFIX         install architecture-independent files in PREFIX
                          [/usr/local]
  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                          [PREFIX]

Fine tuning of the installation directories:
  --bindir=DIR            user executables [PREFIX/bin]
  --sbindir=DIR           system admin executables [PREFIX/sbin]
  --libexecdir=DIR        program executables [EPREFIX/libexec]
  --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
  --datadir=DIR           read-only arch.-independent data root [PREFIX/share]

Optional Features:
  --enable-debug          enable extra debugging [no]
  --enable-tests          enable test programs [no]

System types:
  --build=BUILD           configure for building on BUILD [guessed]
  --host=HOST             cross-compile to build programs to run on HOST [BUILD]
EOF
}

for opt; do
    optarg=$(expr "$opt" : '[^=]*=\(.*\)')
    case "$opt" in
        --help) usage ;;
        --prefix=*) prefix=$optarg;;
        --exec-prefix=*) eprefix=$optarg;;
        --bindir=*) bindir=$optarg;;
        --sbindir=*) sbindir=$optarg;;
        --libexec=*) libexec=$optarg;;
        --sysconfdir=*) sysconfdir=$optarg;;
        --localstatedir=*) localstatedir=$optarg;;
        --datadir=*) datadir=$optarg;;
        --build=*) build=$optarg;;
        --host=*) host=$optarg;;
        --target=*) target=$optarg;;
        --enable-debug) enable_debug=yes;;
        --enable-tests) enable_tests=yes;;
        -* ) echo "$0: unknown option $arg";;
    esac
done

: ${prefix:=/usr/local}
: ${eprefix:=${prefix}}
: ${bindir:=${prefix}/bin}
: ${sbindir:=${prefix}/sbin}
: ${libexecdir:=${eprefix}/libexec}
: ${sysconfdir:=${prefix}/etc}
: ${localstatedir:=${prefix}/var}
: ${datadir:=${prefix}/share}

if [ -z "${build}" ]; then
    build=$(uname -m)-unknown-$(uname -s | tr '[:upper:]' '[:lower:]')
fi

if [ -z "${host}" ]; then
    [ -z "${target}" ] && target=${build}
    host=${target}
fi

if [ -z "${target}" ]; then
    [ -z "${host}" ] && host=${build}
    target=${host}
fi

if [ -z "$CC" ]; then
    printf "Looking for compiler ... "
    for b in ${target}- ""; do
        for cc in gcc pcc icc cc lang; do
            if type $b$cc > /dev/null 2>&1; then
                CC=$b$cc
                echo "$CC"
                break
            fi
        done
        [ -n "$CC" ] && break
    done
    if [ -z "$CC" ]; then
        echo
        echo "no suitable compiler found" >&2
        exit 1
    fi
else
    echo "using compiler $CC"
fi

version=$(cat VERSION)

cat <<EOF >config.h
/*
 * Generated file. DO NOT EDIT!
 */

#define PACKAGE_NAME       "lubi"
#define PACKAGE_VERSION    "${version}"
EOF

cat <<EOF >config.mk
#
# Generated file. DO NOT EDIT!
#

VERSION = ${version}

PREFIX ?= ${prefix}
EPREFIX ?= ${eprefix}
BINDIR ?= ${bindir}
SBINDIR ?= ${sbindir}
LIBEXECDIR ?= ${libexecdir}
SYSCONFDIR ?= ${sysconfdir}
LOCALSTATEDIR ?= ${localstatedir}
DATADIR ?= ${datadir}

ENABLE_DEBUG ?= ${enable_debug}
ENABLE_TESTS ?= ${enable_tests}

CFLAGS += ${CFLAGS}
CPPFLAGS += ${CPPFLAGS}
LDFLAGS += ${LDFLAGS}

CC = ${CC}
EOF