Factor most of buildconf.sh to this shared file

diff --git a/id-config.sh b/id-config.sh
new file mode 100755 (executable)
index 0000000..41e1947
--- /dev/null
+++ b/id-config.sh
@@ -0,0 +1,85 @@
+# To be included by ../buildconf.sh .
+automake=automake
+aclocal=aclocal
+autoconf=autoconf
+libtoolize=libtoolize
+autoheader=autoheader
+
+test -d autom4te.cache && rm -r autom4te.cache
+test -d config || mkdir config
+if [ "`uname -s`" = FreeBSD ]; then
+    # FreeBSD intalls the various auto* tools with version numbers
+    echo "Using special configuration for FreeBSD ..."
+    automake=automake
+    aclocal="aclocal -I /usr/local/share/aclocal"
+    autoconf=autoconf
+    libtoolize=libtoolize
+    autoheader=autoheader
+fi
+
+if [ "`uname -s`" = Darwin ]; then
+    echo "Using special configuration for Darwin/MacOS ..."
+    libtoolize=glibtoolize
+fi
+
+if $automake --version|head -1 |grep ' 1\.[4-7]'; then
+    echo "automake 1.4-1.7 is active. You should use automake 1.8 or later"
+    if [ -f /etc/debian_version ]; then
+        echo " sudo apt-get install automake1.9"
+        echo " sudo update-alternatives --config automake"
+    fi
+    exit 1
+fi
+
+set -x
+$aclocal -I m4
+if grep AC_CONFIG_HEADERS configure.ac >/dev/null; then
+    $autoheader
+fi
+if grep AM_PROG_LIBTOOL configure.ac >/dev/null; then
+    has_libtool=true
+    $libtoolize --automake --force 
+else
+    has_libtool=false
+fi
+
+$automake --add-missing 
+$autoconf
+set -
+if [ -f config.cache ]; then
+       rm config.cache
+fi
+
+enable_configure=false
+enable_help=true
+sh_flags=""
+conf_flags=""
+case $1 in
+    -d)
+       sh_cflags="-g -Wall -Wdeclaration-after-statement -Wstrict-prototypes"
+       sh_cxxflags="-g -Wall"
+       enable_configure=true
+       enable_help=false
+       shift
+       ;;
+    -c)
+       sh_cflags=""
+       sh_cxxflags=""
+       enable_configure=true
+       enable_help=false
+       shift
+       ;;
+esac
+
+if $enable_configure; then
+    if [ -n "$sh_cflags" ]; then
+       if $has_libtool; then
+           CFLAGS="$sh_cflags" CXXFLAGS="$sh_cxxflags" ./configure \
+               --disable-shared --enable-static --with-pic $*
+        else
+           CFLAGS="$sh_cflags" CXXFLAGS="$sh_cxxflags" ./configure $*
+        fi
+    else
+       ./configure $*
+    fi
+fi