diff --git a/Rakefile b/Rakefile
index 0000316..8b6b436 100644
--- a/Rakefile
+++ b/Rakefile
@@ -16,13 +16,19 @@ FIRMWARES = [BOOTLOADER, APPLICATION]
 # which development board is used
 # supported are: WeAct MiniF4 with STM32F401
 BOARD = ENV["BOARD"] || "MINIF401"
+# get MCU from board
+DEVICE = case BOARD
+when "MINIF401"
+  "stm32f401cc"
+else
+  raise "unknown MCU for board #{BOARD}"
+end
 
 # libopencm3 definitions
 LIBOPENCM3_DIR = "libopencm3"
 LIBOPENCM3_INC = LIBOPENCM3_DIR+"/include"
-LIBOPENCM3_LIB = LIBOPENCM3_DIR+"/lib"
-# STM32F4 library used for this project provided by libopencm3
-STM32F4_LIB = "opencm3_stm32f4"
+LIBOPENCM3_LIBS = LIBOPENCM3_DIR+"/lib"
+LIBOPENCM3_LIB = "opencm3_" + `./#{LIBOPENCM3_DIR}/scripts/genlink.py #{LIBOPENCM3_DIR}/ld/devices.data #{DEVICE} FAMILY`
 
 # source code used by the firmware
 SRC_DIRS = [".", "lib"]
@@ -59,7 +65,8 @@ cflags += SRC_DIRS.collect {|srd_dir| "-I #{srd_dir}"}
 # include libopencm3 library
 cflags << "-I #{LIBOPENCM3_INC}"
 # add defines for micro-controller and board
-cflags << "-DSTM32F4 -D#{BOARD}"
+cflags << "-D#{BOARD}"
+cflags << `./#{LIBOPENCM3_DIR}/scripts/genlink.py #{LIBOPENCM3_DIR}/ld/devices.data #{DEVICE} CPPFLAGS`
 # render cflags
 cflags = cflags.compact*' '
 
@@ -76,14 +83,17 @@ ldflags_linker = ["--gc-sections"]
 # show memory usage
 ldflags_linker << "--print-memory-usage"
 # add libopencm3 libraries
-library_paths = [LIBOPENCM3_LIB]
+library_paths = [LIBOPENCM3_LIBS]
 # project libraries
-ldlibs = [STM32F4_LIB]
+ldlibs = [LIBOPENCM3_LIB]
 # general libraries (gcc provides the ARM ABI)
 ldlibs_linker = ["m", "c", "nosys", "gcc"]
 
 # target micro-controller information (ARM Cortex-M4 supports thumb and thumb2, but does not include a floating point unit)
-archflags = "-mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16"
+archflags = "-mthumb"
+archflags += " -mcpu=" + `./#{LIBOPENCM3_DIR}/scripts/genlink.py #{LIBOPENCM3_DIR}/ld/devices.data #{DEVICE} CPU`
+archflags += " -mfloat-abi=" + `./#{LIBOPENCM3_DIR}/scripts/genlink.py #{LIBOPENCM3_DIR}/ld/devices.data #{DEVICE} FPU`.split("-")[0]
+archflags += " -mfpu=" + `./#{LIBOPENCM3_DIR}/scripts/genlink.py #{LIBOPENCM3_DIR}/ld/devices.data #{DEVICE} FPU`.split("-")[1..-1]*"-"
 
 desc "compile firmwares"
 task :default => FIRMWARES
@@ -134,7 +144,7 @@ file LIBOPENCM3_DIR+"/Makefile" do
 end
 
 desc "compile libopencm3"
-file "#{LIBOPENCM3_LIB}/lib#{STM32F4_LIB}.a" => LIBOPENCM3_DIR+"/Makefile" do
+file "#{LIBOPENCM3_LIBS}/lib#{LIBOPENCM3_LIB}.a" => LIBOPENCM3_DIR+"/Makefile" do
   sh "make --directory #{LIBOPENCM3_DIR}"
 end
 
@@ -143,17 +153,17 @@ task :doc => ["Doxyfile", "README.md"] do |t|
 end
 
 desc "compile source into object"
-rule '.o' => ['.c', proc{|f| File.file?(f.ext("h")) ? f.ext("h") : []}, proc{|f| dependencies(f).collect{|d| File.file?(d.ext("h")) ? d.ext("h") : []}}, "#{LIBOPENCM3_LIB}/lib#{STM32F4_LIB}.a"] do |t|
+rule '.o' => ['.c', proc{|f| File.file?(f.ext("h")) ? f.ext("h") : []}, proc{|f| dependencies(f).collect{|d| File.file?(d.ext("h")) ? d.ext("h") : []}}, "#{LIBOPENCM3_LIBS}/lib#{LIBOPENCM3_LIB}.a"] do |t|
   sh "#{CC} #{cflags} #{archflags} -o #{t.name} -c #{t.prerequisites[0]}"
 end
 
 desc "generate dependencies"
-rule '.d' => ['.c', "#{LIBOPENCM3_LIB}/lib#{STM32F4_LIB}.a"] do |t|
+rule '.d' => ['.c', "#{LIBOPENCM3_LIBS}/lib#{LIBOPENCM3_LIB}.a"] do |t|
   sh "#{CC} #{cflags} #{archflags} -MM -MF #{t.name} -c #{t.prerequisites[0]}"
 end
 
 desc "link binary"
-rule '.elf' => ['.o', proc{|f| dependencies(f)}, '.ld', "#{LIBOPENCM3_LIB}/lib#{STM32F4_LIB}.a"] do |t|
+rule '.elf' => ['.o', proc{|f| dependencies(f)}, '.ld', "#{LIBOPENCM3_LIBS}/lib#{LIBOPENCM3_LIB}.a"] do |t|
   sh "#{LD} #{archflags} #{ldflags.join(' ')} #{t.prerequisites[0..-3].join(' ')} -T#{t.name.ext('ld')} #{ldflags_linker.collect{|flag| "-Wl,"+flag}.join(' ')} #{library_paths.collect{|path| "-L"+path}.join(' ')} #{ldlibs.collect{|lib| "-l"+lib}.join(' ')} -Wl,--start-group #{ldlibs_linker.collect{|lib| "-l"+lib}.join(' ')} -Wl,--end-group --output #{t.name}"
 end