support --with-os-type=lfs and /etc/lfs-release autodetection

configure.ac

@@ -396,7 +396,7 @@ fi
 
 AC_SUBST(PAM_MODULE_DIR)
 
-AC_ARG_WITH(os-type,     [  --with-os-type=<os>        distribution or OS (redhat/suse/gentoo/pardus/solaris/netbsd)])
+AC_ARG_WITH(os-type,     [  --with-os-type=<os>        distribution or OS (redhat/suse/gentoo/pardus/solaris/netbsd/lfs)])
 
 #### Check our operating system (distro-tweaks required)
 if test "z$with_os_type" = "z"; then
@@ -404,6 +404,7 @@ if test "z$with_os_type" = "z"; then
 	AC_CHECK_FILE(/etc/SuSE-release,distro_type="suse")
 	AC_CHECK_FILE(/etc/gentoo-release,distro_type="gentoo")
 	AC_CHECK_FILE(/etc/pardus-release,distro_type="pardus")
+	AC_CHECK_FILE(/etc/lfs-release,distro_type="lfs")
 	if test "z$distro_type" = "z"; then
 		echo "Linux distribution autodetection failed, specify the distribution to target using --with-os-type="
 	else
@@ -427,6 +428,8 @@ if test x$with_os_type = x; then
 	with_os_type=freebsd
     elif test x$operating_system = xnetbsd ; then
 	with_os_type=netbsd
+    elif test x$operating_system = xlfs ; then
+	with_os_type=lfs
     else
 	case "$host_os" in
 	  *netbsd*)
@@ -471,6 +474,11 @@ elif test x$with_os_type = xfreebsd -o x$with_os_type = xnetbsd; then
     PAM_FILE_INCLUDE_ACCOUNT=system
     PAM_FILE_INCLUDE_PASSWORD=system
     PAM_FILE_INCLUDE_SESSION=system
+elif test x$with_os_type = xlfs; then
+    PAM_FILE_INCLUDE_AUTH=system-auth
+    PAM_FILE_INCLUDE_ACCOUNT=system-account
+    PAM_FILE_INCLUDE_PASSWORD=system-password
+    PAM_FILE_INCLUDE_SESSION=system-session
 else
    PAM_FILE_INCLUDE_AUTH=system-auth
    PAM_FILE_INCLUDE_ACCOUNT=system-auth