X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=Makefile-ccan;h=f1d76e6c8927ef111ac4f9c24b45eac669e08dd3;hp=0396ac22c1fe4410399279e7e1dd900b4160eeef;hb=7ba34091a536da4f09f0865f18ca0c3fc1d12de7;hpb=3fb9ac9349703401a6b2c3e969f3bc9bdb9d1eae

diff --git a/Makefile-ccan b/Makefile-ccan
index 0396ac22..f1d76e6c 100644
--- a/Makefile-ccan
+++ b/Makefile-ccan
@@ -1,11 +1,40 @@
-# Example makefile which makes a "libccan.a" of everything under ccan/
-# You could just do:
-#	SRCFILES += $(shell find ccan/ -name '[a-z]*.c')
+# Example makefile which makes a "libccan.a" of everything under ccan/.
+# For simple projects you could just do:
+#	SRCFILES += $(wildcard ccan/*/*.c)
 
-CFLAGS=-g -O3 -Wall -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Werror -I.
+#CCAN_CFLAGS=-g -O3 -Wall -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations
+CCAN_CFLAGS=-g -Wall -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations
+CFLAGS = $(CCAN_CFLAGS) -I. $(DEPGEN) -Werror
 
-CFILES=$(wildcard ccan/*/[a-z]*.c)
-OBJFILES=$(CFILES:.c=.o)
+
+default: libccan.a
+
+# Automatic dependency generation: makes ccan/*/*.d files.
+DEPGEN=-MD
+-include ccan/*/*.d
+
+# Anything with an _info file is a module.
+REALLY_ALL=$(patsubst ccan/%/_info, %, $(wildcard ccan/*/_info))
+
+# Exclude any modules we can't build.
+ALL=$(filter-out $(EXCLUDE), $(REALLY_ALL))
+
+# Anything with C files needs building; dir leaves / on, sort uniquifies
+DIRS=$(patsubst %/, %, $(sort $(foreach m, $(ALL), $(dir $(wildcard ccan/$m/*.c)))))
+
+# Generate everyone's separate Makefiles.
+-include $(foreach dir, $(DIRS), $(dir)-Makefile)
+
+ccan/%-Makefile:
+	@echo $@: $(wildcard ccan/$*/*.[ch]) ccan/$*/_info > $@
+	@echo ccan/$*.o: $(patsubst %.c, %.o, $(wildcard ccan/$*/*.c)) >> $@
+
+# We compile all the ccan/foo/*.o files together into ccan/foo.o
+OBJFILES=$(DIRS:=.o)
+
+# We create all the .o files and link them together.
+$(OBJFILES): %.o:
+	$(LD) -r -o $@ $^
 
 libccan.a: $(OBJFILES)
-	$(AR) r $@ $^
+	$(AR) r $@ $(OBJFILES)