Use new `paths' system

skel/config

@@ -7,6 +7,28 @@
 #  http://www.gnu.org/copyleft/gpl.html for details.
 #
 # This file contains options used to build @P@.
-#
 
+
+# PREFIX is the most important option. Many other paths are derived from it, as follows:
+#
+#   PREFIX      | /                 | /usr              | /usr/local        | /opt/*
+#   ------------+-------------------+-------------------+-------------------+-----------------
+#   BINDIR      | /bin              | /usr/bin          | /usr/local/bin    | /opt/*/bin
+#   SBINDIR     | /sbin             | /usr/sbin         | /usr/local/sbin   | /opt/*/sbin
+#   LIBDIR      | /lib              | /usr/lib          | /usr/local/lib    | /opt/*/lib
+#   INCLUDEDIR  | /usr/include      | /usr/include      | /usr/local/include| /opt/*/include
+#   CONFIGDIR   | /etc              | /etc              | /usr/local/etc    | /etc/opt/*
+#   VARDIR      | /var              | /var              | /var              | /var/opt/*
+#   SHAREDIR    | /usr/share        | /usr/share        | /usr/local/share  | /opt/*/share
+#   DOCSDIR     | /usr/share/doc    | /usr/share/doc    | /usr/local/share/doc, /opt/*/doc
+#   WEBDIR      | /srv/http         | /srv/http         | /srv/http         | /opt/*/http
+#
+# Specific notes:
+#   When installing, all paths are prepended with INSTALL_PREFIX.
+#   Any parameter can be overridden by setting an environment variable.
+#   CGIDIR is set to ${WEBDIR}/cgi-bin .
+#
 [ -z "${PREFIX}" ] && PREFIX="/usr/local"
+source "scripts/paths"
+
+# Project-specific variables below.

skel/scripts/paths

@@ -0,0 +1,58 @@
+# @P@/scripts/paths
+# vim: syntax=sh:sw=4:ts=4:expandtab
+#
+#  Default path setup. Not meant for editing; use environment variables 
+#  to override values if needed.
+#
+
+case "${PREFIX}" in
+/)
+    BINDIR="/bin"
+    SBINDIR="/sbin"
+    LIBDIR="/lib"
+    INCLUDEDIR="/usr/include"
+    CONFIGDIR="/etc"
+    VARDIR="/var"
+    SHAREDIR="/usr/share/@P@"
+    DOCSDIR="/usr/share/doc/@P@"
+    WEBDIR="/srv/http"
+    ;;
+
+/usr)
+    BINDIR="/usr/bin"
+    SBINDIR="/usr/sbin"
+    LIBDIR="/usr/lib"
+    INCLUDEDIR="/usr/include"
+    CONFIGDIR="/etc"
+    VARDIR="/var"
+    SHAREDIR="/usr/share/@P@"
+    DOCSDIR="/usr/share/doc/@P@"
+    WEBDIR="/srv/http"
+    ;;
+
+/usr/local)
+    BINDIR="/usr/local/bin"
+    SBINDIR="/usr/local/sbin"
+    LIBDIR="/usr/local/lib"
+    INCLUDEDIR="/usr/local/include"
+    CONFIGDIR="/usr/local/etc"
+    VARDIR="/var"
+    SHAREDIR="/usr/local/share/@P@"
+    DOCSDIR="/usr/local/share/doc/@P@"
+    WEBDIR="/srv/http"
+    ;;
+
+/opt/*)
+    BINDIR="${PREFIX}/bin"
+    SBINDIR="${PREFIX}/sbin"
+    LIBDIR="${PREFIX}/lib"
+    INCLUDEDIR="${PREFIX}/include"
+    CONFIGDIR="/etc${PREFIX}"
+    VARDIR="/var${PREFIX}"
+    SHAREDIR="/var${PREFIX}"
+    DOCSDIR="${PREFIX}/doc"
+    WEBDIR="${PREFIX}/http"
+    ;;
+esac
+
+CGIDIR="${WEBDIR}/cgi-bin"