sys/preprocessor: add preprocessor module

makefiles/defaultmodules_deps.inc.mk

@@ -2,6 +2,10 @@
 # end of the dependency loop. They MAY inlcude new modules, but this modules
 # MUST NOT have dependencies themselfs.
 
+ifneq (,$(filter auto_init%,$(USEMODULE)))
+  USEMODULE += preprocessor preprocessor_successor
+endif
+
 ifneq (,$(filter auto_init_ztimer,$(USEMODULE)))
   USEMODULE += ztimer_init
 endif

sys/Makefile

@@ -173,6 +173,9 @@ endif
 ifneq (,$(filter pthread,$(USEMODULE)))
   DIRS += posix/pthread
 endif
+ifneq (,$(filter preprocessor_%,$(USEMODULE)))
+  DIRS += preprocessor
+endif
 ifneq (,$(filter routing,$(USEMODULE)))
   DIRS += net/routing
 endif

sys/Makefile.include

@@ -181,3 +181,7 @@ endif
 ifneq (,$(filter tiny_strerror,$(USEMODULE)))
   include $(RIOTBASE)/sys/tiny_strerror/Makefile.include
 endif
+
+ifneq (,$(filter preprocessor_%,$(USEMODULE)))
+  include $(RIOTBASE)/sys/preprocessor/Makefile.include
+endif

sys/preprocessor/Makefile

@@ -0,0 +1,3 @@
+MODULE := preprocessor
+
+include $(RIOTBASE)/Makefile.base

sys/preprocessor/Makefile.include

@@ -0,0 +1,18 @@
+RIOT_PP_SUCCESSOR_MAX ?= 9999
+
+PSEUDOMODULES += preprocessor_successor
+
+USEMODULE_INCLUDES_preprocessor := $(BINDIR)/preprocessor
+USEMODULE_INCLUDES += $(USEMODULE_INCLUDES_preprocessor)
+
+RIOT_GENERATE_PP_HEADERS :=
+
+ifneq (,$(filter preprocessor_successor,$(USEMODULE)))
+  RIOT_GENERATE_PP_HEADERS += $(BINDIR)/preprocessor/preprocessor_successor.h
+endif
+
+BUILDDEPS += $(RIOT_GENERATE_PP_HEADERS)
+
+$(BINDIR)/preprocessor/preprocessor_successor.h:
+	@mkdir -p '$(dir $@)'
+	$(Q)'$(RIOTTOOLS)/generate_pp_successor_header/generate_pp_successor_header.sh' $(RIOT_PP_SUCCESSOR_MAX) > $@