diff -r aaad6674a1a3 -r 24dc84788dee configure
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/configure	Thu Oct 12 00:00:35 2023 +0200
@@ -0,0 +1,756 @@
+#!/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 "$TEMP_DIR/features"
+
+# define standard variables
+# also define standard prefix (this is where we will search for config.site)
+prefix=/usr
+exec_prefix=
+bindir=
+sbindir=
+libdir=
+libexecdir=
+datarootdir=
+datadir=
+sysconfdir=
+sharedstatedir=
+localstatedir=
+runstatedir=
+includedir=
+infodir=
+localedir=
+mandir=
+
+# custom variables
+src_dir=`pwd`
+DOXYGEN=`command -v doxygen`
+PANDOC=`command -v pandoc`
+CMAKE=`command -v cmake`
+
+# features
+
+# clean abort
+abort_configure()
+{
+    rm -Rf "$TEMP_DIR"
+    exit 1
+}
+
+# help text
+printhelp()
+{
+    echo "Usage: $0 [OPTIONS]..."
+    cat << __EOF__
+Installation directories:
+  --prefix=PREFIX         path prefix for architecture-independent files
+                          [/usr]
+  --exec-prefix=EPREFIX   path prefix for architecture-dependent files
+                          [PREFIX]
+
+  --bindir=DIR            user executables [EPREFIX/bin]
+  --sbindir=DIR           system admin executables [EPREFIX/sbin]
+  --libexecdir=DIR        program executables [EPREFIX/libexec]
+  --sysconfdir=DIR        system configuration files [PREFIX/etc]
+  --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
+  --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
+  --runstatedir=DIR       run-time variable data [LOCALSTATEDIR/run]
+  --libdir=DIR            object code libraries [EPREFIX/lib]
+  --includedir=DIR        C header files [PREFIX/include]
+  --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
+  --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
+  --infodir=DIR           info documentation [DATAROOTDIR/info]
+  --mandir=DIR            man documentation [DATAROOTDIR/man]
+  --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
+
+Options:
+  --debug                 add extra compile flags for debug builds
+  --release               add extra compile flags for release builds
+  --with-tests=(yes|no)
+  --with-docs=(all|html|api|none)
+
+__EOF__
+}
+
+#
+# parse arguments
+#
+BUILD_TYPE="default"
+for ARG in "$@"
+do
+    case "$ARG" in
+        "--prefix="*)         prefix=${ARG#--prefix=} ;;
+        "--exec-prefix="*)    exec_prefix=${ARG#--exec-prefix=} ;;
+        "--bindir="*)         bindir=${ARG#----bindir=} ;;
+        "--sbindir="*)        sbindir=${ARG#--sbindir=} ;;
+        "--libdir="*)         libdir=${ARG#--libdir=} ;;
+        "--libexecdir="*)     libexecdir=${ARG#--libexecdir=} ;;
+        "--datarootdir="*)    datarootdir=${ARG#--datarootdir=} ;;
+        "--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=${ARG#--mandir} ;;
+        "--localedir"*)       localedir=${ARG#--localedir} ;;
+        "--help"*) printhelp; abort_configure ;;
+        "--debug")           BUILD_TYPE="debug" ;;
+        "--release")         BUILD_TYPE="release" ;;
+        "--with-tests="*) OPT_WITH_TESTS=${ARG#--with-tests=} ;;
+        "--with-docs="*) OPT_WITH_DOCS=${ARG#--with-docs=} ;;
+        "-"*) echo "unknown option: $ARG"; abort_configure ;;
+    esac
+done
+
+
+
+# set defaults for dir variables
+: ${exec_prefix:="$prefix"}
+: ${bindir:='${exec_prefix}/bin'}
+: ${sbindir:='${exec_prefix}/sbin'}
+: ${libdir:='${exec_prefix}/lib'}
+: ${libexecdir:='${exec_prefix}/libexec'}
+: ${datarootdir:='${prefix}/share'}
+: ${datadir:='${datarootdir}'}
+: ${sysconfdir:='${prefix}/etc'}
+: ${sharedstatedir:='${prefix}/com'}
+: ${localstatedir:='${prefix}/var'}
+: ${runstatedir:='${localstatedir}/run'}
+: ${includedir:='${prefix}/include'}
+: ${infodir:='${datarootdir}/info'}
+: ${mandir:='${datarootdir}/man'}
+: ${localedir:='${datarootdir}/locale'}
+
+# check if a config.site exists and load it
+if [ -n "$CONFIG_SITE" ]; then
+    # CONFIG_SITE may contain space separated file names
+    for cs in $CONFIG_SITE; do
+        printf "loading defaults from $cs... "
+        . "$cs"
+        echo ok
+    done
+elif [ -f "$prefix/share/config.site" ]; then
+    printf "loading site defaults... "
+    . "$prefix/share/config.site"
+    echo ok
+elif [ -f "$prefix/etc/config.site" ]; then
+    printf "loading site defaults... "
+    . "$prefix/etc/config.site"
+    echo ok
+fi
+
+# 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="$prefix"
+exec_prefix="$exec_prefix"
+bindir="$bindir"
+sbindir="$sbindir"
+libdir="$libdir"
+libexecdir="$libexecdir"
+datarootdir="$datarootdir"
+datadir="$datadir"
+sysconfdir="$sysconfdir"
+sharedstatedir="$sharedstatedir"
+localstatedir="$localstatedir"
+runstatedir="$runstatedir"
+includedir="$includedir"
+infodir="$infodir"
+mandir="$mandir"
+localedir="$localedir"
+src_dir="$src_dir"
+DOXYGEN="$DOXYGEN"
+PANDOC="$PANDOC"
+CMAKE="$CMAKE"
+__EOF__
+
+# toolchain detection utilities
+. make/toolchain.sh
+
+#
+# DEPENDENCIES
+#
+
+# check languages
+lang_c=
+lang_cpp=
+if detect_cpp_compiler ; then
+    lang_cpp=1
+fi
+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" "$1" ; then :
+    else return 1 ; fi
+    return 0
+}
+
+dependency_error_pandoc()
+{
+    printf "checking for pandoc... "
+    # dependency pandoc
+    while true
+    do
+        if test -n "$PANDOC" > /dev/null ; then
+            :
+        else
+            break
+        fi
+        echo yes
+        return 1
+    done
+
+    echo no
+    return 0
+}
+dependency_error_cpp()
+{
+    printf "checking for cpp... "
+    # dependency cpp
+    while true
+    do
+        if [ -z "$lang_cpp" ] ; then
+            break
+        fi
+        echo yes
+        return 1
+    done
+
+    echo no
+    return 0
+}
+dependency_error_c()
+{
+    printf "checking for c... "
+    # dependency c platform="mingw"
+    while true
+    do
+        if notisplatform "mingw"; then
+            break
+        fi
+        if [ -z "$lang_c" ] ; then
+            break
+        fi
+        cat >> $TEMP_DIR/make.mk << __EOF__
+# Dependency: c
+AR=ar
+ARFLAGS=r
+STLIB_EXT=.lib
+SHLIB_EXT=.dll
+
+__EOF__
+        echo yes
+        return 1
+    done
+
+    # dependency c platform="macos"
+    while true
+    do
+        if notisplatform "macos"; then
+            break
+        fi
+        if [ -z "$lang_c" ] ; then
+            break
+        fi
+        cat >> $TEMP_DIR/make.mk << __EOF__
+# Dependency: c
+AR=ar
+ARFLAGS=r
+STLIB_EXT=.a
+SHLIB_EXT=.dylib
+
+__EOF__
+        echo yes
+        return 1
+    done
+
+    # dependency c platform="unix"
+    while true
+    do
+        if notisplatform "unix"; then
+            break
+        fi
+        if [ -z "$lang_c" ] ; then
+            break
+        fi
+        cat >> $TEMP_DIR/make.mk << __EOF__
+# Dependency: c
+AR=ar
+ARFLAGS=r
+STLIB_EXT=.a
+SHLIB_EXT=.so
+
+__EOF__
+        echo yes
+        return 1
+    done
+
+    echo no
+    return 0
+}
+dependency_error_file_tools()
+{
+    printf "checking for file-tools... "
+    # dependency file-tools
+    while true
+    do
+        cat >> $TEMP_DIR/make.mk << __EOF__
+# Dependency: file-tools
+MKDIR=mkdir -p
+RMDIR=rm -f -R
+COPYFILE=cp
+COPYALL=cp -R
+
+__EOF__
+        echo yes
+        return 1
+    done
+
+    echo no
+    return 0
+}
+dependency_error_cmake()
+{
+    printf "checking for cmake... "
+    # dependency cmake
+    while true
+    do
+        if test -n "$CMAKE" > /dev/null ; then
+            :
+        else
+            break
+        fi
+        echo yes
+        return 1
+    done
+
+    echo no
+    return 0
+}
+dependency_error_doxygen()
+{
+    printf "checking for doxygen... "
+    # dependency doxygen
+    while true
+    do
+        if test -n "$DOXYGEN" > /dev/null ; then
+            :
+        else
+            break
+        fi
+        echo yes
+        return 1
+    done
+
+    echo no
+    return 0
+}
+
+
+
+
+# start collecting dependency information
+echo > "$TEMP_DIR/flags.mk"
+
+DEPENDENCIES_FAILED=
+ERROR=0
+# unnamed dependencies
+TEMP_CFLAGS=
+TEMP_CXXFLAGS=
+TEMP_LDFLAGS=
+while true
+do
+    while true
+    do
+
+        cat >> "$TEMP_DIR/make.mk" << __EOF__
+# library version
+VERSION="3.0.0"
+
+# build directory structure !! do not change or override !!
+BUILD_DIR=${src_dir}/build
+DOCS_DIR=${src_dir}/build/docs
+DIST_DIR=${src_dir}/dist
+
+__EOF__
+        break
+    done
+    break
+done
+
+# add general dependency flags to flags.mk
+echo "# general flags" >> "$TEMP_DIR/flags.mk"
+if [ -n "${TEMP_CFLAGS}" -a -n "$lang_c" ]; then
+    echo "CFLAGS += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
+fi
+if [ -n "${TEMP_CXXFLAGS}" -a -n "$lang_cpp" ]; 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
+#
+checkopt_with_tests_yes()
+{
+    VERR=0
+    if dependency_error_cpp ; then
+        VERR=1
+    fi
+    if dependency_error_cmake ; then
+        VERR=1
+    fi
+    if [ $VERR -ne 0 ]; then
+        return 1
+    fi
+    cat >> "$TEMP_DIR/make.mk" << __EOF__
+WITH_TESTS=yes
+
+__EOF__
+    return 0
+}
+checkopt_with_tests_no()
+{
+    VERR=0
+    if [ $VERR -ne 0 ]; then
+        return 1
+    fi
+    return 0
+}
+checkopt_with_docs_all()
+{
+    VERR=0
+    if dependency_error_pandoc ; then
+        VERR=1
+    fi
+    if dependency_error_doxygen ; then
+        VERR=1
+    fi
+    if [ $VERR -ne 0 ]; then
+        return 1
+    fi
+    cat >> "$TEMP_DIR/make.mk" << __EOF__
+# Documentation
+WITH_DOCS_API=yes
+WITH_DOCS_HTML=yes
+
+__EOF__
+    return 0
+}
+checkopt_with_docs_html()
+{
+    VERR=0
+    if dependency_error_pandoc ; then
+        VERR=1
+    fi
+    if [ $VERR -ne 0 ]; then
+        return 1
+    fi
+    cat >> "$TEMP_DIR/make.mk" << __EOF__
+# Documentation
+WITH_DOCS_HTML=yes
+
+__EOF__
+    return 0
+}
+checkopt_with_docs_api()
+{
+    VERR=0
+    if dependency_error_doxygen ; then
+        VERR=1
+    fi
+    if [ $VERR -ne 0 ]; then
+        return 1
+    fi
+    cat >> "$TEMP_DIR/make.mk" << __EOF__
+# Documentation
+WITH_DOCS_API=yes
+
+__EOF__
+    return 0
+}
+checkopt_with_docs_none()
+{
+    VERR=0
+    if [ $VERR -ne 0 ]; then
+        return 1
+    fi
+    return 0
+}
+
+#
+# TARGETS
+#
+
+echo >> "$TEMP_DIR/flags.mk"
+echo "configuring global target"
+echo "# flags for unnamed target" >> "$TEMP_DIR/flags.mk"
+TEMP_CFLAGS=
+TEMP_CXXFLAGS=
+TEMP_LDFLAGS=
+
+if dependency_error_c; then
+    DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED c "
+    ERROR=1
+fi
+if dependency_error_file_tools; then
+    DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED file_tools "
+    ERROR=1
+fi
+
+# Features
+
+# Option: --with-tests
+if [ -z "$OPT_WITH_TESTS" ]; then
+    echo "auto-detecting option 'with-tests'"
+    SAVED_ERROR="$ERROR"
+    SAVED_DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED"
+    ERROR=1
+    while true
+    do
+        if checkopt_with_tests_yes ; then
+            echo "  with-tests: yes" >> "$TEMP_DIR/options"
+            ERROR=0
+            break
+        fi
+        if checkopt_with_tests_no ; then
+            echo "  with-tests: no" >> "$TEMP_DIR/options"
+            ERROR=0
+            break
+        fi
+        break
+    done
+    if [ $ERROR -ne 0 ]; then
+        SAVED_ERROR=1
+        SAVED_DEPENDENCIES_FAILED="option 'with-tests' $SAVED_DEPENDENCIES_FAILED"
+    fi
+    ERROR="$SAVED_ERROR"
+    DEPENDENCIES_FAILED="$SAVED_DEPENDENCIES_FAILED"
+else
+    echo "checking option with-tests = $OPT_WITH_TESTS"
+    if false; then
+        false
+    elif [ "$OPT_WITH_TESTS" = "yes" ]; then
+        echo "  with-tests: $OPT_WITH_TESTS" >> $TEMP_DIR/options
+        if checkopt_with_tests_yes ; then
+            :
+        else
+            ERROR=1
+            DEPENDENCIES_FAILED="option 'with-tests' $DEPENDENCIES_FAILED"
+        fi
+    elif [ "$OPT_WITH_TESTS" = "no" ]; then
+        echo "  with-tests: $OPT_WITH_TESTS" >> $TEMP_DIR/options
+        if checkopt_with_tests_no ; then
+            :
+        else
+            ERROR=1
+            DEPENDENCIES_FAILED="option 'with-tests' $DEPENDENCIES_FAILED"
+        fi
+    fi
+fi
+# Option: --with-docs
+if [ -z "$OPT_WITH_DOCS" ]; then
+    echo "auto-detecting option 'with-docs'"
+    SAVED_ERROR="$ERROR"
+    SAVED_DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED"
+    ERROR=1
+    while true
+    do
+        if checkopt_with_docs_all ; then
+            echo "  with-docs: all" >> "$TEMP_DIR/options"
+            ERROR=0
+            break
+        fi
+        if checkopt_with_docs_html ; then
+            echo "  with-docs: html" >> "$TEMP_DIR/options"
+            ERROR=0
+            break
+        fi
+        if checkopt_with_docs_api ; then
+            echo "  with-docs: api" >> "$TEMP_DIR/options"
+            ERROR=0
+            break
+        fi
+        if checkopt_with_docs_none ; then
+            echo "  with-docs: none" >> "$TEMP_DIR/options"
+            ERROR=0
+            break
+        fi
+        break
+    done
+    if [ $ERROR -ne 0 ]; then
+        SAVED_ERROR=1
+        SAVED_DEPENDENCIES_FAILED="option 'with-docs' $SAVED_DEPENDENCIES_FAILED"
+    fi
+    ERROR="$SAVED_ERROR"
+    DEPENDENCIES_FAILED="$SAVED_DEPENDENCIES_FAILED"
+else
+    echo "checking option with-docs = $OPT_WITH_DOCS"
+    if false; then
+        false
+    elif [ "$OPT_WITH_DOCS" = "all" ]; then
+        echo "  with-docs: $OPT_WITH_DOCS" >> $TEMP_DIR/options
+        if checkopt_with_docs_all ; then
+            :
+        else
+            ERROR=1
+            DEPENDENCIES_FAILED="option 'with-docs' $DEPENDENCIES_FAILED"
+        fi
+    elif [ "$OPT_WITH_DOCS" = "html" ]; then
+        echo "  with-docs: $OPT_WITH_DOCS" >> $TEMP_DIR/options
+        if checkopt_with_docs_html ; then
+            :
+        else
+            ERROR=1
+            DEPENDENCIES_FAILED="option 'with-docs' $DEPENDENCIES_FAILED"
+        fi
+    elif [ "$OPT_WITH_DOCS" = "api" ]; then
+        echo "  with-docs: $OPT_WITH_DOCS" >> $TEMP_DIR/options
+        if checkopt_with_docs_api ; then
+            :
+        else
+            ERROR=1
+            DEPENDENCIES_FAILED="option 'with-docs' $DEPENDENCIES_FAILED"
+        fi
+    elif [ "$OPT_WITH_DOCS" = "none" ]; then
+        echo "  with-docs: $OPT_WITH_DOCS" >> $TEMP_DIR/options
+        if checkopt_with_docs_none ; then
+            :
+        else
+            ERROR=1
+            DEPENDENCIES_FAILED="option 'with-docs' $DEPENDENCIES_FAILED"
+        fi
+    fi
+fi
+
+if [ -n "${TEMP_CFLAGS}" -a -n "$lang_c" ]; then
+    echo "CFLAGS  += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
+fi
+if [ -n "${TEMP_CXXFLAGS}" -a -n "$lang_cpp" ]; then
+    echo "CXXFLAGS  += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
+fi
+if [ "$BUILD_TYPE" = "debug" ]; then
+    if [ -n "$lang_c" ]; then
+        echo 'CFLAGS += ${DEBUG_CC_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+    if [ -n "$lang_cpp" ]; then
+        echo 'CXXFLAGS += ${DEBUG_CXX_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+fi
+if [ "$BUILD_TYPE" = "release" ]; then
+    if [ -n "$lang_c" ]; then
+        echo 'CFLAGS += ${RELEASE_CC_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+    if [ -n "$lang_cpp" ]; then
+        echo 'CXXFLAGS += ${RELEASE_CXX_FLAGS}' >> "$TEMP_DIR/flags.mk"
+    fi
+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:   $TOOLCHAIN_NAME"
+echo "Options:"
+cat "$TEMP_DIR/options"
+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"
+
+