diff --git a/Makefile b/Makefile
index abd4dca30685447c41d2dd1f42f447eade5edfea..3625462ef49b1f251e0aab35985e96211f31e2db 100644
--- a/Makefile
+++ b/Makefile
@@ -380,6 +380,9 @@ endif
 
 default: build/system.elf
 
+include/config.h: .config
+	${QUIET}awk -f script/conf2h.awk .config > include/config.h
+
 stack: default
 	${QUIET}test -n "${OBJDUMP}"
 	${QUIET}test -n "${ARCH_SHORTNAME}"
diff --git a/script/conf2h.awk b/script/conf2h.awk
new file mode 100644
index 0000000000000000000000000000000000000000..818beeabb46307318f3816bd6533dfe285f35f66
--- /dev/null
+++ b/script/conf2h.awk
@@ -0,0 +1,35 @@
+#! /usr/bin/gawk -f
+#
+# Copyright 2021 AG Eingebettete Softwaresysteme, Universität Osnabrück
+#
+# SPDX-License-Identicier: CC0-1.0
+
+BEGIN {
+  print "// config.h generated from " ARGV[1] "\n" \
+    "#ifndef CONFIG_H\n" \
+    "#define CONFIG_H"
+}
+
+/^CONFIG_.*?_INSTANCES=/ { next }
+
+/^#/ { sub(/^#/,"//") }
+
+/^CONFIG_.*?=/ {
+  if (/=n$/) {
+    sub(/^/,"// ");
+  } else {
+    sub(/^/,"#define ")
+    if (/=y$/) {
+      sub(/=.*$/,"")
+    } else if (/=".*"$/) {
+      sub(/="/, " ")
+      sub(/"$/, "")
+    } else {
+      sub(/=/," ")
+    }
+  }
+}
+
+{ print }
+
+END { print "#endif" }
diff --git a/src/arch/arduino-nano/Makefile.inc b/src/arch/arduino-nano/Makefile.inc
index 12777d9741b8434ab2eb3460524a25e2d5f8a3e5..0ce2ef79b8396d2641c85fc6cb91e29bcfd581c5 100644
--- a/src/arch/arduino-nano/Makefile.inc
+++ b/src/arch/arduino-nano/Makefile.inc
@@ -140,10 +140,10 @@ COMMON_FLAGS += -DBAUD=${uart_baud}UL
 
 OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o}
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 
-.c.o:
+%.o : %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 
 build/system.elf: ${OBJECTS}
diff --git a/src/arch/atmega2560/Makefile.inc b/src/arch/atmega2560/Makefile.inc
index d78db663bed8d31eadc3cdb1abbc7dc19b2d96e0..acfd65a5615ba6c93d797f719da9ed63a96be00e 100644
--- a/src/arch/atmega2560/Makefile.inc
+++ b/src/arch/atmega2560/Makefile.inc
@@ -135,10 +135,10 @@ COMMON_FLAGS += -DBAUD=${uart_baud}UL
 
 OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o}
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 
-.c.o:
+%.o : %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 
 build/system.elf: ${OBJECTS}
diff --git a/src/arch/blinkenrocket/Makefile.inc b/src/arch/blinkenrocket/Makefile.inc
index 41e1de348b20e3cceea24c99811c29f456ea0844..64e87f54340460836550ed64717776374cf8b87b 100644
--- a/src/arch/blinkenrocket/Makefile.inc
+++ b/src/arch/blinkenrocket/Makefile.inc
@@ -54,10 +54,10 @@ endif
 
 OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o}
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 
-.c.o:
+%.o : %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 
 build/system.elf: ${OBJECTS}
diff --git a/src/arch/esp8266/Makefile.inc b/src/arch/esp8266/Makefile.inc
index 18877eefde6d3f35e0a26e39460d1a003e5c335b..7bbc2f1d0b04b78c89653bbd46ca17c7ac81f600 100644
--- a/src/arch/esp8266/Makefile.inc
+++ b/src/arch/esp8266/Makefile.inc
@@ -64,11 +64,11 @@ ifdef CONFIG_arch_esp8266_driver_uptime
 	CXX_TARGETS += src/arch/esp8266/driver/uptime.cc
 endif
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 	${QUIET}${OBJCOPY} --rename-section .text=.irom0.text --rename-section .literal=.irom0.literal $@
 
-.c.o:
+%.o : %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 	${QUIET}${OBJCOPY} --rename-section .text=.irom0.text --rename-section .literal=.irom0.literal $@
 
diff --git a/src/arch/lm4f120h5qr-stellaris/Makefile.inc b/src/arch/lm4f120h5qr-stellaris/Makefile.inc
index d49391b9e3e34ab3af4386cc07d9ae7333e33866..7d1e5e9f64fa0eae31db8e548a3c711e63b94ea3 100644
--- a/src/arch/lm4f120h5qr-stellaris/Makefile.inc
+++ b/src/arch/lm4f120h5qr-stellaris/Makefile.inc
@@ -73,16 +73,16 @@ endif
 
 OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o} ${ASM_TARGETS:.S=.o}
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 
-.c.o:
+%.o : %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 
-.S.o:
+%.o : %.S | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} -c -o $@ ${@:.o=.S}
 
-.s.o:
+%.o : %.s | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} -c -o $@ ${@:.o=.S}
 
 ext/libopencm3/Makefile:
diff --git a/src/arch/msp430fr5969lp/Makefile.inc b/src/arch/msp430fr5969lp/Makefile.inc
index f9d9a28af137c5bbb3078f6f7a483a4d84328731..d6f4d9f60138cbd6e068b9363d72fd5c051ee370 100644
--- a/src/arch/msp430fr5969lp/Makefile.inc
+++ b/src/arch/msp430fr5969lp/Makefile.inc
@@ -112,13 +112,13 @@ endif
 
 OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o} ${ASM_TARGETS:.S=.o}
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 
-.c.o:
+%.o : %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 
-.S.o:
+%.o : %.S | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} -Wa,-gstabs,-ggdb -x assembler-with-cpp -c -o $@ ${@:.o=.S}
 
 build/system.elf: ${OBJECTS}
diff --git a/src/arch/msp430fr5994lp/Makefile.inc b/src/arch/msp430fr5994lp/Makefile.inc
index 57a7d2cfa122161e650003faa97452d572b39bf5..cffb3950bb705d4b0e86713179acb779f12eb398 100644
--- a/src/arch/msp430fr5994lp/Makefile.inc
+++ b/src/arch/msp430fr5994lp/Makefile.inc
@@ -154,13 +154,13 @@ endif
 
 OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o} ${ASM_TARGETS:.S=.o}
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 
-.c.o:
+%.o : %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 
-.S.o:
+%.o : %.S | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} -Wa,-gstabs,-ggdb -x assembler-with-cpp -c -o $@ ${@:.o=.S}
 
 build/system.elf: ${OBJECTS}
diff --git a/src/arch/posix/Makefile.inc b/src/arch/posix/Makefile.inc
index 32a56cc20b00482b4c0207b1ed96af22c80b5584..5e7e7eed0f83588ed34e6811cb39e612d62abc91 100644
--- a/src/arch/posix/Makefile.inc
+++ b/src/arch/posix/Makefile.inc
@@ -45,10 +45,10 @@ ifdef CONFIG_gpio_trace
 	COMMON_FLAGS += -DGPIO_TRACE
 endif
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 
-.c.o:
+%.o: %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 
 build/system.elf: ${OBJECTS}
diff --git a/src/arch/stm32f446re-nucleo/Makefile.inc b/src/arch/stm32f446re-nucleo/Makefile.inc
index dd0de000948a53e96b07234fae7f4db9a0f2819e..2aec12bb494382383af7903b64bd6263b73e794a 100644
--- a/src/arch/stm32f446re-nucleo/Makefile.inc
+++ b/src/arch/stm32f446re-nucleo/Makefile.inc
@@ -72,16 +72,16 @@ endif
 
 OBJECTS = ${CXX_TARGETS:.cc=.o} ${C_TARGETS:.c=.o} ${ASM_TARGETS:.S=.o}
 
-.cc.o:
+%.o : %.cc | include/config.h
 	${QUIET}${CXX} ${INCLUDES} ${COMMON_FLAGS} ${CXXFLAGS} -c -o $@ ${@:.o=.cc}
 
-.c.o:
+%.o : %.c | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} ${CFLAGS} -c -o $@ ${@:.o=.c}
 
-.S.o:
+%.o : %.S | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} -c -o $@ ${@:.o=.S}
 
-.s.o:
+%.o : %.s | include/config.h
 	${QUIET}${CC} ${INCLUDES} ${COMMON_FLAGS} -c -o $@ ${@:.o=.S}
 
 ext/libopencm3/Makefile: