build: export build system to external modules

Signed-off-by: Philippe Gerum <rpm@xenomai.org>

Makefile

@@ -1,18 +1,14 @@
-include scripts/config.mk
+# SPDX-License-Identifier: MIT
+
+include config.mk
 
-GOALS := all clean clobber mrproper install
 TARGETS := include lib tests utils commands
 
-$(GOALS):
+$(MAIN_GOALS):
 	@for target in $(TARGETS); do					\
 		$(MAKE) -C $$target O=$(O_DIR)/$$target V=$(V) $@;	\
 	done
 
-$(TARGETS):
-	$(Q)$(MAKE) -C $@ O=$(O_DIR)/$@ V=$(V)
-
 lib: include
 
 tests utils: lib
-
-.PHONY: $(GOALS) $(TARGETS)

commands/Makefile

@@ -1,4 +1,6 @@
-include ../scripts/config.mk
+# SPDX-License-Identifier: MIT
+
+include ../config.mk
 
 CMDFILES := $(wildcard *.c)
 BINARIES = $(CMDFILES:%.c=%)
@@ -22,6 +24,4 @@ clean clobber mrproper:
 $(O_DIR)/%: %.c
 	$(call ccld-cmd,$@,$(Q)$(CC) -o $(@) $< $(CFLAGS) $(LDFLAGS))
 
-.PHONY: all install clean clobber mrproper
-
 -include $(DEPFILES)

config.mk

@@ -1,10 +1,7 @@
 # SPDX-License-Identifier: MIT
 
-LIBSERIAL	:= 0
-LIBIVERSION	:= 0
-
 ARCH		?= $(shell uname -m | sed	\
-	  	-e s/arm.*/arm/			\
+		-e s/arm.*/arm/			\
 		-e s/aarch64.*/arm64/ )
 CROSS_COMPILE	?=
 CC		= $(CROSS_COMPILE)gcc
@@ -85,5 +82,12 @@ ccld-cmd = $(call run-cc,CCLD,$(1),$(2))
 ld-cmd = $(call run-cmd,LD,$(notdir $(1)),$(2))
 ar-cmd = $(call run-cmd,AR,$(notdir $(1)),$(2) $(if $(Q),2>/dev/null))
 
+MAIN_GOALS := all clean clobber mrproper install
+
+$(TARGETS):
+	$(Q)$(MAKE) -C $@ O=$(O_DIR)/$@ V=$(V)
+
 $(O_DIR)/%.d: %.c
 	$(call dep-cmd,$@,@$(CC) -MM $(CFLAGS) $< | sed 's$(comma)\($*\)\.o[ :]*$(comma)$(O_DIR)/\1.o $@: $(comma)g' > $@ || rm -f $@)
+
+.PHONY: $(MAIN_GOALS) $(TARGETS)

include/Makefile

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: MIT
 
-include ../scripts/config.mk
+include ../config.mk
 
 O_UAPI = $(O_DIR)/uapi
 
@@ -29,5 +29,3 @@ install: all
 	$(Q)$(MKDIR_P) $(DESTDIR)/$(includedir)/uapi
 	$(Q)(cd $(O_UAPI) && find -L evenless \! \( -name '*~' \) -type f | $(CPIO) -Lpdum $(DESTDIR)/$(includedir)/uapi)
 	$(Q)(find evenless \! \( -name '*~' \) -type f | $(CPIO) -Lpdum $(DESTDIR)/$(includedir))
-
-.PHONY: clean clobber mrproper install

lib/Makefile

@@ -1,10 +1,11 @@
 # SPDX-License-Identifier: MIT
 
-include ../scripts/config.mk
+include ../config.mk
+include ../libversion.mk
 
-DTSONAME := libevenless.so.$(LIBIVERSION)
-SOLIBNAME := libevenless-$(LIBSERIAL).so.$(LIBIVERSION)
-ARLIBNAME := libevenless-$(LIBSERIAL).a
+DTSONAME := libevenless.so.$(EVL_IVERSION)
+SOLIBNAME := libevenless-$(EVL_SERIAL).so.$(EVL_IVERSION)
+ARLIBNAME := libevenless-$(EVL_SERIAL).a
 TARGETS := $(O_DIR)/$(SOLIBNAME) $(O_DIR)/$(ARLIBNAME)
 
 SRCFILES := $(wildcard *.c arch/$(ARCH)/*.c)
@@ -46,7 +47,7 @@ $(O_DIR)/$(ARLIBNAME): $(OBJFILES)
 
 $(O_DIR)/syscall-pic.o $(O_DIR)/syscall.o: override CFLAGS := $(CFLAGS) -fomit-frame-pointer
 
-$(O_DIR)/version-pic.o $(O_DIR)/version.o: override CFLAGS := $(CFLAGS) -DLIBSERIAL=\"$(LIBSERIAL)\"
+$(O_DIR)/version-pic.o $(O_DIR)/version.o: override CFLAGS := $(CFLAGS) -DLIBSERIAL=\"$(EVL_SERIAL)\"
 version.c: $(O_DIR)/git-stamp.h
 
 $(O_DIR)/git-stamp.h: git-stamp
@@ -60,12 +61,12 @@ $(O_DIR)/git-stamp.h: git-stamp
 	    $(RM) -f $@ && touch $@;							\
 	fi; true
 
+.PHONY: git-stamp
+
 $(O_DIR)/%-pic.o: %.c
 	$(call cc-pic-cmd,$@,$(CC) $(CFLAGS) -fPIC -c -o $@ $<)
 
 $(O_DIR)/%.o: %.c
 	$(call cc-cmd,$@,$(CC) $(CFLAGS) -c -o $@ $<)
 
-.PHONY: all install clean clobber mrproper git-stamp
-
 -include $(DEPFILES)

libversion.mk

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: MIT
+
+EVL_SERIAL	:= 0
+EVL_IVERSION	:= 0

tests/Makefile

@@ -1,4 +1,7 @@
-include ../scripts/config.mk
+# SPDX-License-Identifier: MIT
+
+include ../config.mk
+include ../libversion.mk
 
 TESTFILES := $(wildcard *.c)
 BINARIES = $(TESTFILES:%.c=%)
@@ -13,7 +16,7 @@ TEST_CPPFLAGS := $(BASE_CPPFLAGS)		\
 TEST_CFLAGS := $(TEST_CPPFLAGS) $(BASE_CFLAGS)
 override CFLAGS := $(TEST_CFLAGS) $(CFLAGS)
 
-TEST_LDFLAGS := $(O_DIR)/../lib/libevenless.so.$(LIBIVERSION) -lpthread -lrt
+TEST_LDFLAGS := $(O_DIR)/../lib/libevenless.so.$(EVL_IVERSION) -lpthread -lrt
 override LDFLAGS := $(TEST_LDFLAGS) $(LDFLAGS)
 
 all: $(TARGETS)
@@ -29,6 +32,4 @@ clean clobber mrproper:
 $(O_DIR)/%: %.c
 	$(call ccld-cmd,$@,$(Q)$(CC) -o $(@) $< $(CFLAGS) $(LDFLAGS))
 
-.PHONY: all install clean clobber mrproper
-
 -include $(DEPFILES)

utils/Makefile

@@ -1,4 +1,7 @@
-include ../scripts/config.mk
+# SPDX-License-Identifier: MIT
+
+include ../config.mk
+include ../libversion.mk
 
 UTILFILES := $(wildcard *.c)
 BINARIES = $(UTILFILES:%.c=%)
@@ -13,7 +16,7 @@ UTIL_CPPFLAGS := $(BASE_CPPFLAGS)		\
 UTIL_CFLAGS := $(UTIL_CPPFLAGS) $(BASE_CFLAGS)
 override CFLAGS := $(UTIL_CFLAGS) $(CFLAGS)
 
-UTIL_LDFLAGS := $(O_DIR)/../lib/libevenless.so.$(LIBIVERSION) -lpthread -lrt
+UTIL_LDFLAGS := $(O_DIR)/../lib/libevenless.so.$(EVL_IVERSION) -lpthread -lrt
 override LDFLAGS := $(UTIL_LDFLAGS) $(LDFLAGS)
 
 all: $(TARGETS)
@@ -29,6 +32,4 @@ clean clobber mrproper:
 $(O_DIR)/%: %.c
 	$(call ccld-cmd,$@,$(Q)$(CC) -o $(@) $< $(CFLAGS) $(LDFLAGS))
 
-.PHONY: all install clean clobber mrproper
-
 -include $(DEPFILES)