diff --git a/project/clbuild.sh b/project/clbuild.sh
new file mode 100755
index 0000000..cdb2229
--- /dev/null
+++ b/project/clbuild.sh
@@ -0,0 +1,189 @@
+#!/bin/sh
+# a poor man's universal driver (but stay tuned...)
+
+error_msg()
+{
+	echo $@ >&2
+}
+
+mb_cc=
+mb_ar=
+mb_source_dir=
+mb_project_dir=
+mb_sysroot=
+
+# one: args
+for arg ; do
+	case "$arg" in
+		--help)	usage
+			;;
+		--cc=*)
+			mb_cc=${arg#*=}
+			;;
+		--ar=*)
+			mb_ar=${arg#*=}
+			;;
+		--source-dir=*)
+			mb_source_dir=${arg#*=}
+			;;
+		--project-dir=*)
+			mb_project_dir=${arg#*=}
+			;;
+		--sysroot=*)
+			mb_sysroot=${arg#*=}
+			;;
+		*)
+			error_msg ${arg#}: "unsupported config argument."
+			exit 2
+			;;
+	esac
+done
+
+if [ -z "$mb_cc" ] || [ -z "$mb_ar" ]           \
+		   || [ -z "$mb_source_dir" ]   \
+		   || [ -z "$mb_project_dir" ]; then
+	usage
+fi
+
+# two: clean
+make -s clean || exit 1
+
+# three: init
+echo '@echo on'
+echo '@dir . > nul'
+echo
+echo
+echo 'REM override variables either here or from the shell'
+echo 'set source_dir=%source_dir%'
+echo 'set sysroot=%sysroot%'
+echo
+echo
+
+# four: build tree
+cmd_abort_on_error='@if %errorlevel% neq 0 exit /b %errorlevel%'
+sysroot_include_arg='-I%sysroot%/include'
+
+dirs=`make dirs.tag tree.tag                    \
+	 | grep -v 'make\[1\]:'                 \
+	 | grep -v 'touch dirs.tag'             \
+	 | grep -v 'touch tree.tag'             \
+	 | sed                                  \
+		-e 's/mkdir -p//g'              \
+		-e 's@/@\\\\@g'`
+
+for d in $dirs; do
+	printf 'if not exist %-20smkdir %s\n' "$d" "$d"
+done
+
+echo
+echo "$cmd_abort_on_error"
+echo
+
+# five: compile assembly sources
+make shared-objs-asm static-objs-asm                            \
+	 | grep -v 'make\[1\]:'                                 \
+	 | grep -v "$mb_project_dir/sysinfo/host"               \
+	 | grep -v 'touch dirs.tag'                             \
+	 | grep -v 'touch host.tag'                             \
+	 | grep -v 'touch version.tag'                          \
+	 | grep -v 'touch app.tag'                              \
+	 | sed                                                  \
+		-e 's@'"$mb_cc -c "'@ml64 /nologo @'            \
+		-e 's@ '"$mb_source_dir"'@ /c %source_dir%@'    \
+		-e 's@-o @/Fo @g'                               \
+		-e 's@\.s@\.asm@g'                              \
+		-e 's,$,\n\n'"$cmd_abort_on_error"'\n,g'
+
+# six: compile C sources
+make shared-objs static-objs app-objs                           \
+	 | grep -v 'make\[1\]:'                                 \
+	 | grep -v "$mb_project_dir/sysinfo/host"               \
+	 | grep -v 'touch dirs.tag'                             \
+	 | grep -v 'touch host.tag'                             \
+	 | grep -v 'touch version.tag'                          \
+	 | grep -v 'touch app.tag'                              \
+	 | sed                                                  \
+		-e 's@'"$mb_cc -c "'@cl /nologo -c @'           \
+		-e 's@ '"$mb_source_dir"'@ %source_dir%@'       \
+		-e 's@-I'"$mb_source_dir"'@-I%source_dir%@g'    \
+		-e 's@-ffreestanding@/X /GS-@g'                 \
+		-e 's@-o @/Fo:@g'                               \
+		-e 's@-std=c99 @@g'                             \
+		-e 's@-fPIC@@g'                                 \
+		-e 's@-fpic@@g'                                 \
+		-e 's@-g @/Zi @g'                               \
+		-e 's@-g0 @/Zi @g'                              \
+		-e 's@-g1 @/Zi @g'                              \
+		-e 's@-g2 @/Zi @g'                              \
+		-e 's@-g3 @/Zi @g'                              \
+		-e 's@-O @/O2 @g'                               \
+		-e 's@-Os @/O1 @g'                              \
+		-e 's@-O0 @/Od @g'                              \
+		-e 's@-O1 @/O2 @g'                              \
+		-e 's@-O2 @/O2 @g'                              \
+		-e 's@-O3 @/O2 @g'                              \
+		-e 's@-Wall @/Wall @g'                          \
+		-e 's@-Werror @/WX @g'                          \
+		-e 's@-Wextra @@g'                              \
+		-e 's@-Wundef @/Wall @g'                        \
+		-e 's@'"$mb_sysroot "'@ @'                      \
+		-e 's,$, -I%sysroot%/include\n\n'"$cmd_abort_on_error"'\n,g'
+
+echo
+echo '@echo.'
+echo '@echo clbuild: successfully built: shared-objs static-objs app-objs.'
+echo '@echo.'
+echo
+
+# seven: create static archive
+make static                                             \
+	 | grep -v 'make\[1\]:'                         \
+	 | grep -v "rm -f "                             \
+	 | sed                                          \
+		-e 's@'"$mb_ar"' rcs @lib /out:@'       \
+		-e 's,$, /nologo\n,g'
+
+echo
+echo "$cmd_abort_on_error"
+echo
+
+echo
+echo '@echo.'
+echo '@echo clbuild: successfully created: static archive.'
+echo '@echo.'
+echo
+
+# eight: link shared library
+make LDFLAGS_IMPLIB= LDFLAGS_SONAME= shared-lib                 \
+	 | grep -v 'make\[1\]:'                                 \
+	 | sed                                                  \
+		-e 's@'"$mb_cc"' -shared @link /dll /nologo @'  \
+		-e 's@-o @/out:@g'                              \
+		-e 's@ -L@ /libpath:@g'                         \
+		-e 's, -l\([^ ]\+\), %sysroot%/lib/lib\1.lib,g' \
+		-e 's@-nostdlib @/nodefaultlib @g'              \
+		-e 's@-Wl,--subsystem=@/subsystem:@g'           \
+		-e 's@-Wl,--entry -Wl,'"''"'@/entry:@g'         \
+		-e 's@-Wl,--entry -Wl,@/entry:@g'               \
+		-e 's@-Wl,--no-undefined@@g'                    \
+		-e 's@-Wl,--exclude-all-symbols@@g'             \
+		-e 's@'"$mb_sysroot "'@ @'                      \
+
+echo
+echo "$cmd_abort_on_error"
+echo
+
+echo
+echo '@echo.'
+echo '@echo clbuild: successfully linked: shared library.'
+echo '@echo.'
+echo
+
+echo
+echo '@echo.'
+echo '@echo yay.'
+echo '@echo.'
+echo
+
+# all done
+exit 0
diff --git a/project/extras.mk b/project/extras.mk
index 781c5ff..a86cec3 100644
--- a/project/extras.mk
+++ b/project/extras.mk
@@ -27,3 +27,11 @@ install-headers-custom:	install-headers-default
 
 			cp $(API_HEADERS_X86_64) \
 			   $(DESTDIR)$(INCLUDEDIR)/$(PACKAGE)/bits/nt64
+
+clbuild-bat:
+	@$(PROJECT_DIR)/project/clbuild.sh      \
+		--cc=$(CC)                      \
+		--ar=$(AR)                      \
+		--source-dir=$(SOURCE_DIR)      \
+		--project-dir=$(PROJECT_DIR)    \
+		--sysroot=$(CFLAGS_SYSROOT)