configure

#!/bin/sh

# create temporary directory
TEMP_DIR=".tmp-`uname -n`"
rm -Rf "$TEMP_DIR"
if mkdir -p "$TEMP_DIR"; then
    :
else
    echo "Cannot create tmp dir $TEMP_DIR"
    echo "Abort"
    exit 1
fi
touch "$TEMP_DIR/options"
touch "$TEMP_DIR/features"

# define standard variables
PREFIX=/usr
EPREFIX=
BINDIR=
SBINDIR=
LIBDIR=
LIBEXECDIR=
DATADIR=
SYSCONFDIR=
SHAREDSTATEDIR=
LOCALSTATEDIR=
INCLUDEDIR=
INFODIR=
MANDIR=

# custom variables
BUILDDIR=`pwd`/build

# features

# clean abort
abort_configure()
{
    rm -Rf "$TEMP_DIR"
    exit 1
}

# help text
printhelp()
{
    echo "Usage: $0 [OPTIONS]..."
    cat << __EOF__
Installation directories:
  --prefix=PREFIX         path prefix for architecture-independent files
                          [/usr]
  --exec-prefix=EPREFIX   path prefix for architecture-dependent files
                          [PREFIX]

  --bindir=DIR            user executables [EPREFIX/bin]
  --sbindir=DIR           system admin executables [EPREFIX/sbin]
  --libexecdir=DIR        program executables [EPREFIX/libexec]
  --sysconfdir=DIR        system configuration files [PREFIX/etc]
  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
  --libdir=DIR            object code libraries [EPREFIX/lib]
  --includedir=DIR        C header files [PREFIX/include]
  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
  --infodir=DIR           info documentation [DATAROOTDIR/info]
  --mandir=DIR            man documentation [DATAROOTDIR/man]

__EOF__
}

#
# parse arguments
#
BUILD_TYPE="default"
for ARG in "$@"
do
    case "$ARG" in
        "--prefix="*)         PREFIX=${ARG#--prefix=} ;;
        "--exec-prefix="*)    EPREFIX=${ARG#--exec-prefix=} ;;
        "--bindir="*)         BINDIR=${ARG#----bindir=} ;;
        "--sbindir="*)        SBINDIR=${ARG#--sbindir=} ;;
        "--libdir="*)         LIBDIR=${ARG#--libdir=} ;;
        "--libexecdir="*)     LIBEXECDIR=${ARG#--libexecdir=} ;;
        "--datadir="*)        DATADIR=${ARG#--datadir=} ;;
        "--sysconfdir="*)     SYSCONFDIR=${ARG#--sysconfdir=} ;;
        "--sharedstatedir="*) SHAREDSTATEDIR=${ARG#--sharedstatedir=} ;;
        "--localstatedir="*)  LOCALSTATEDIR=${ARG#--localstatedir=} ;;
        "--includedir="*)     INCLUDEDIR=${ARG#--includedir=} ;;
        "--infodir="*)        INFODIR=${ARG#--infodir=} ;;
        "--mandir"*)          MANDIR=${ARG#--mandir} ;;
        "--help"*) printhelp; abort_configure ;;
        "--debug")           BUILD_TYPE="debug" ;;
        "--release")         BUILD_TYPE="release" ;;
        "-"*) echo "unknown option: $ARG"; abort_configure ;;
    esac
done


# set dir variables
: ${EPREFIX:="$PREFIX"}
: ${BINDIR:="$EPREFIX/bin"}
: ${SBINDIR:="$EPREFIX/sbin"}
: ${LIBDIR:="$EPREFIX/lib"}
: ${LIBEXECDIR:="$EPREFIX/libexec"}
: ${DATADIR:="$PREFIX/share"}
: ${SYSCONFDIR:="$PREFIX/etc"}
: ${SHAREDSTATEDIR:="$PREFIX/com"}
: ${LOCALSTATEDIR:="$PREFIX/var"}
: ${INCLUDEDIR:="$PREFIX/include"}
: ${INFODIR:="$PREFIX/info"}
: ${MANDIR:="$PREFIX/man"}

# Test for availability of pkg-config
PKG_CONFIG=`command -v pkg-config`
: ${PKG_CONFIG:="false"}

# Simple uname based platform detection
# $PLATFORM is used for platform dependent dependency selection
OS=`uname -s`
OS_VERSION=`uname -r`
printf "detect platform... "
if [ "$OS" = "SunOS" ]; then
    PLATFORM="solaris sunos unix svr4"
fi
if [ "$OS" = "Linux" ]; then
    PLATFORM="linux unix"
fi
if [ "$OS" = "FreeBSD" ]; then
    PLATFORM="freebsd bsd unix"
fi
if [ "$OS" = "Darwin" ]; then
    PLATFORM="macos osx bsd unix"
fi
if echo "$OS" | grep -i "MINGW" > /dev/null; then
    PLATFORM="windows mingw"
fi
: ${PLATFORM:="unix"}

PLATFORM_NAME=`echo "$PLATFORM" | cut -f1 -d' ' -`
echo "$PLATFORM_NAME"

isplatform()
{
    for p in $PLATFORM
    do
        if [ "$p" = "$1" ]; then
            return 0
        fi
    done
    return 1
}
notisplatform()
{
    for p in $PLATFORM
    do
        if [ "$p" = "$1" ]; then
            return 1
        fi
    done
    return 0
}


# generate vars.mk
cat > "$TEMP_DIR/vars.mk" << __EOF__
PREFIX=$PREFIX
EPREFIX=$EPREFIX
BINDIR=$BINDIR
SBINDIR=$SBINDIR
LIBDIR=$LIBDIR
LIBEXECDIR=$LIBEXECDIR
DATADIR=$DATADIR
SYSCONFDIR=$SYSCONFDIR
SHAREDSTATEDIR=$SHAREDSTATEDIR
LOCALSTATEDIR=$LOCALSTATEDIR
INCLUDEDIR=$INCLUDEDIR
INFODIR=$INFODIR
MANDIR=$MANDIR
BUILDDIR=$BUILDDIR
__EOF__
sort -u -o "$TEMP_DIR/vars.mk" "$TEMP_DIR/vars.mk"


# toolchain detection utilities
. make/toolchain.sh

#
# DEPENDENCIES
#

# check languages
lang_c=
lang_cpp=
if detect_c_compiler ; then
    lang_c=1
fi

# create buffer for make variables required by dependencies
echo > "$TEMP_DIR/make.mk"

test_pkg_config()
{
    if "$PKG_CONFIG" --exists "$1" ; then :
    else return 1 ; fi
    if [ -z "$2" ] || "$PKG_CONFIG" --atleast-version="$2" "$1" ; then :
    else return 1 ; fi
    if [ -z "$3" ] || "$PKG_CONFIG" --exact-version="$3" "$1" ; then :
    else return 1 ; fi
    if [ -z "$4" ] || "$PKG_CONFIG" --max-version="$4" "$1" ; then :
    else return 1 ; fi
    return 0
}

dependency_error_archiver()
{
    printf "checking for archiver... "
    # dependency archiver
    while true
    do
        if command -v ar > /dev/null ; then
            :
        else
            break
        fi
        cat >> $TEMP_DIR/make.mk << __EOF__
# Dependency: archiver
AR = ar
ARFLAGS = -r

__EOF__
        echo yes
        return 1
    done

    echo no
    return 0
}
dependency_error_rmdir()
{
    printf "checking for rmdir... "
    # dependency rmdir
    while true
    do
        if command -v rm > /dev/null ; then
            :
        else
            break
        fi
        cat >> $TEMP_DIR/make.mk << __EOF__
# Dependency: rmdir
RM = rm
RMFLAGS = -f -R

__EOF__
        echo yes
        return 1
    done

    echo no
    return 0
}
dependency_error_ncurses()
{
    printf "checking for ncurses... "
    # dependency ncurses
    while true
    do
        if [ -z "$PKG_CONFIG" ]; then
            break
        fi
        if test_pkg_config "ncursesw" "" "" "" ; then
            TEMP_CFLAGS="$TEMP_CFLAGS `"$PKG_CONFIG" --cflags ncursesw`"
            TEMP_LDFLAGS="$TEMP_LDFLAGS `"$PKG_CONFIG" --libs ncursesw`"
        else
            break
        fi
        echo yes
        return 1
    done

    echo no
    return 0
}
dependency_error_mkdir()
{
    printf "checking for mkdir... "
    # dependency mkdir
    while true
    do
        if command -v mkdir > /dev/null ; then
            :
        else
            break
        fi
        cat >> $TEMP_DIR/make.mk << __EOF__
# Dependency: mkdir
MKDIR = mkdir
MKDIRFLAGS = -p

__EOF__
        echo yes
        return 1
    done

    echo no
    return 0
}


# start collecting dependency information
echo > "$TEMP_DIR/flags.mk"

DEPENDENCIES_FAILED=
ERROR=0
# unnamed dependencies
TEMP_CFLAGS=
TEMP_CXXFLAGS=
TEMP_LDFLAGS=
while true
do
    while true
    do
        if [ -z "$lang_c" ] ; then
            ERROR=1
            break
        fi

        cat >> "$TEMP_DIR/make.mk" << __EOF__
LIB_EXT = .a
OBJ_EXT = .o

__EOF__
        break
    done
    break
done

# add general dependency flags to flags.mk
echo "# general flags" >> "$TEMP_DIR/flags.mk"
if [ -n "${TEMP_CFLAGS}" ]; then
    echo "CFLAGS += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
fi
if [ -n "${TEMP_CXXFLAGS}" ]; then
    echo "CXXFLAGS += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
fi
if [ -n "${TEMP_LDFLAGS}" ]; then
    echo "LDFLAGS += $TEMP_LDFLAGS" >> "$TEMP_DIR/flags.mk"
fi

#
# OPTION VALUES
#

#
# TARGETS
#

echo >> "$TEMP_DIR/flags.mk"
# Target: default
echo "# flags for target default" >> "$TEMP_DIR/flags.mk"
TEMP_CFLAGS=
TEMP_CXXFLAGS=
TEMP_LDFLAGS=

if dependency_error_archiver; then
    DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED archiver "
    ERROR=1
fi
if dependency_error_rmdir; then
    DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED rmdir "
    ERROR=1
fi
if dependency_error_ncurses; then
    DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED ncurses "
    ERROR=1
fi
if dependency_error_mkdir; then
    DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED mkdir "
    ERROR=1
fi

# Features


if [ -n "${TEMP_CFLAGS}" ]; then
    echo "CFLAGS  += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
fi
if [ -n "${TEMP_CXXFLAGS}" ]; then
    echo "CXXFLAGS  += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
fi
if [ "$BUILD_TYPE" = "debug" ]; then
    echo 'CFLAGS += ${DEBUG_CC_FLAGS}' >> "$TEMP_DIR/flags.mk"
    echo 'CXXFLAGS += ${DEBUG_CXX_FLAGS}' >> "$TEMP_DIR/flags.mk"
fi
if [ "$BUILD_TYPE" = "release" ]; then
    echo 'CFLAGS += ${RELEASE_CC_FLAGS}' >> "$TEMP_DIR/flags.mk"
    echo 'CXXFLAGS += ${RELEASE_CXX_FLAGS}' >> "$TEMP_DIR/flags.mk"
fi
if [ -n "${TEMP_LDFLAGS}" ]; then
    echo "LDFLAGS += $TEMP_LDFLAGS" >> "$TEMP_DIR/flags.mk"
fi


# final result
if [ $ERROR -ne 0 ]; then
    echo
    echo "Error: Unresolved dependencies"
    echo "$DEPENDENCIES_FAILED"
    abort_configure
fi

echo "configure finished"
echo
echo "Build Config:"
echo "  PREFIX:    $PREFIX"
echo "  TOOLCHAIN: $TOOLCHAIN_NAME"
echo

# generate the config.mk file
cat > "$TEMP_DIR/config.mk" << __EOF__
#
# config.mk generated by configure
#

__EOF__
write_toolchain_defaults "$TEMP_DIR/toolchain.mk"
cat "$TEMP_DIR/vars.mk" "$TEMP_DIR/toolchain.mk" "$TEMP_DIR/flags.mk" "$TEMP_DIR/make.mk" > config.mk
rm -Rf "$TEMP_DIR"