Proper recursive dependencies (came from libantithread work)

.bzrignore

 _info
 .depends
 *~
+tools/ccan_depends
 tools/doc_extract
 tools/namespacize
 tools/run_tests
 tools/ccanlint/ccanlint
 tools/ccanlint/generated-init-tests
+inter-depends
+test-depends
+lib-depends

Makefile

 # Hacky makefile to compile everything and run the tests in some kind of sane order.
 # V=--verbose for verbose tests.
 
-CFLAGS=-O3 -Wall -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Werror -Iccan -I.
+CFLAGS=-g -Wall -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Werror -Iccan -I.
 
-ALL=$(patsubst ccan/%/test, ccan/%, $(wildcard ccan/*/test))
-ALL_DEPENDS=$(patsubst %, %/.depends, $(ALL))
+ALL=$(patsubst ccan/%/test, %, $(wildcard ccan/*/test))
+ALL_DIRS=$(patsubst %, ccan/%, $(ALL))
+ALL_DEPENDS=$(patsubst %, ccan/%/.depends, $(ALL))
+ALL_LIBS=$(patsubst %, ccan/lib%.a, $(ALL))
 
-test-all: $(ALL_DEPENDS)
-	$(MAKE) `for f in $(ALL); do echo test-$$f test-$$f; while read d; do echo test-$$d test-$$f; done < $$f/.depends; done | tsort`
+test: $(ALL_DIRS:%=test-%)
 
 distclean: clean
 	rm -f */_info
 	rm -f $(ALL_DEPENDS)
 
-$(ALL_DEPENDS): %/.depends: %/_info
-	@$< depends > $@ || ( rm -f $@; exit 1 )
+$(ALL_DEPENDS): $(ALL_DIRS:=/_info)
 
-test-ccan/%: tools/run_tests
+$(ALL_DEPENDS): %/.depends: tools/ccan_depends
+	tools/ccan_depends $* > $@ || ( rm -f $@; exit 1 )
+
+foo:
+	echo $(ALL_LIBS)
+
+$(ALL_LIBS):
+	$(AR) r $@ $^
+
+test-ccan/%: tools/run_tests ccan/lib%.a
 	@echo Testing $*...
 	@if tools/run_tests $(V) ccan/$* | grep ^'not ok'; then exit 1; else exit 0; fi
 
 ccanlint: tools/ccanlint/ccanlint
 
 clean: tools-clean
-	rm -f `find . -name '*.o'` `find . -name '.depends'`
+	$(RM) `find . -name '*.o'` `find . -name '.depends'` `find . -name '*.a'`
+	$(RM) inter-depends lib-depends test-depends
+
+inter-depends: $(ALL_DEPENDS)
+	for f in $(ALL_DEPENDS); do echo test-ccan/`basename \`dirname $$f\``: `sed -n 's,ccan/\(.*\),ccan/lib\1.a,p' < $$f`; done > $@
+
+test-depends: $(ALL_DEPENDS)
+	for f in $(ALL_DEPENDS); do echo test-ccan/`basename \`dirname $$f\``: `sed -n 's,ccan/\(.*\),test-ccan/\1,p' < $$f`; done > $@
+
+lib-depends: $(foreach D,$(ALL),$(wildcard $D/*.[ch]))
+	for c in $(ALL); do echo ccan/lib$$c.a: `ls ccan/$$c/*.c | grep -v /_info.c | sed 's/.c$$/.o/'`; done > $@
 
 include tools/Makefile
+-include inter-depends
+-include test-depends
+-include lib-depends

tools/Makefile

+tools/ccan_depends: tools/ccan_depends.o tools/depends.o tools/split.o tools/grab_file.o ccan/talloc/talloc.o
+
 tools/run_tests: tools/run_tests.o tools/depends.o tools/split.o tools/grab_file.o ccan/tap/tap.o ccan/talloc/talloc.o
 
 tools/doc_extract: tools/doc_extract.c ccan/talloc/talloc.o

tools/ccan_depends.c

+#include "tools.h"
+#include <err.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "string/string.h"
+
+int main(int argc, char *argv[])
+{
+	char **deps;
+	unsigned int i;
+
+	if (argc != 2)
+		errx(1, "Usage: ccan_depends <dir>\n"
+		        "Spits out all the ccan dependencies (recursively)");
+
+	deps = get_deps(NULL, argv[1]);
+	for (i = 0; deps[i]; i++)
+		if (strstarts(deps[i], "ccan/"))
+			printf("%s\n", deps[i]);
+	return 0;
+}

tools/depends.c

 #include "talloc/talloc.h"
+#include "string/string.h"
 #include "tools.h"
 #include <err.h>
+#include <stdbool.h>
 
-static char ** __attribute__((format(printf, 2, 3)))
-lines_from_cmd(const void *ctx, char *format, ...)
+static char ** __attribute__((format(printf, 3, 4)))
+lines_from_cmd(const void *ctx, unsigned int *num, char *format, ...)
 {
 	va_list ap;
 	char *cmd, *buffer;
@@ -22,30 +24,55 @@ lines_from_cmd(const void *ctx, char *format, ...)
 		err(1, "Reading from '%s'", cmd);
 	pclose(p);
 
-	return split(ctx, buffer, "\n", NULL);
+	return split(ctx, buffer, "\n", num);
 }
 
-static char *build_info(const void *ctx, const char *dir)
+static char **get_one_deps(const void *ctx, const char *dir, unsigned int *num)
 {
-	char *file, *cfile, *cmd;
+	char **deps, *cmd;
+
+	cmd = talloc_asprintf(ctx, "%s/_info depends", dir);
+	deps = lines_from_cmd(cmd, num, "%s", cmd);
+	if (!deps)
+		err(1, "Could not run '%s'", cmd);
+	return deps;
+}
 
-	cfile = talloc_asprintf(ctx, "%s/%s", dir, "_info.c");
-	file = talloc_asprintf(cfile, "%s/%s", dir, "_info");
-	cmd = talloc_asprintf(file, "gcc " CFLAGS " -o %s %s", file, cfile);
-	if (system(cmd) != 0)
-		errx(1, "Failed to compile %s", file);
+static bool have_dep(char **deps, unsigned int num, const char *dep)
+{
+	unsigned int i;
 
-	return file;
+	for (i = 0; i < num; i++)
+		if (streq(deps[i], dep))
+			return true;
+	return false;
 }
 
+/* Gets all the dependencies, recursively. */
 char **get_deps(const void *ctx, const char *dir)
 {
-	char **deps, *cmd;
+	char **deps;
+	unsigned int i, num;
 
-	cmd = talloc_asprintf(ctx, "%s depends", build_info(ctx, dir));
-	deps = lines_from_cmd(cmd, cmd);
-	if (!deps)
-		err(1, "Could not run '%s'", cmd);
+	deps = get_one_deps(ctx, dir, &num);
+	for (i = 0; i < num; i++) {
+		char **newdeps;
+		unsigned int j, newnum;
+
+		if (!strstarts(deps[i], "ccan/"))
+			continue;
+
+		newdeps = get_one_deps(ctx, deps[i], &newnum);
+
+		/* Should be short, so brute-force out dups. */
+		for (j = 0; j < newnum; j++) {
+			if (have_dep(deps, num, newdeps[j]))
+				continue;
+
+			deps = talloc_realloc(NULL, deps, char *, num + 2);
+			deps[num++] = newdeps[j];
+			deps[num] = NULL;
+		}
+	}
 	return deps;
 }
-

tools/namespacize.c

@@ -10,6 +10,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include "string/string.h"
 #include "talloc/talloc.h"
 #include "tools.h"
 

tools/run_tests.c

@@ -19,7 +19,7 @@ static int verbose;
 struct test_type
 {
 	const char *name;
-	void (*testfn)(struct test_type *t, const char *name);
+	void (*testfn)(const char *dir, struct test_type *t, const char *name);
 };
 
 struct test
@@ -98,14 +98,27 @@ static void add_obj(const char *testdir, const char *name)
 	objs = obj;
 }
 
-static int build(const char *name, int fail)
+static int build(const char *dir, const char *name, int fail)
 {
 	const char *cmd;
 	int ret;
+	char *externals = talloc_strdup(name, "");
+	char **deps;
 
-	cmd = talloc_asprintf(name, "gcc " CFLAGS " %s -o %s %s %s%s",
+	for (deps = get_deps(objs, dir); *deps; deps++) {
+		char *end;
+		if (!strstarts(*deps, "ccan/"))
+			continue;
+
+		end = strrchr(*deps, '/') + 1;
+		/* ccan/foo -> ccan/libfoo.a */
+		externals = talloc_asprintf_append(externals,
+						   " ccan/lib%s.a", end);
+	}
+
+	cmd = talloc_asprintf(name, "gcc " CFLAGS " %s -o %s %s %s%s%s",
 			      fail ? "-DFAIL" : "",
-			      output_name(name), name, obj_list(),
+			      output_name(name), name, obj_list(), externals,
 			      verbose ? "" : "> /dev/null 2>&1");
 
 	if (verbose)
@@ -118,17 +131,17 @@ static int build(const char *name, int fail)
 	return ret;
 }
 
-static void compile_ok(struct test_type *t, const char *name)
+static void compile_ok(const char *dir, struct test_type *t, const char *name)
 {
-	ok(build(name, 0) == 0, "%s %s", t->name, name);
+	ok(build(dir, name, 0) == 0, "%s %s", t->name, name);
 }
 
-static void compile_fail(struct test_type *t, const char *name)
+static void compile_fail(const char *dir, struct test_type *t, const char *name)
 {
-	if (build(name, 0) != 0)
+	if (build(dir, name, 0) != 0)
 		fail("non-FAIL build %s", name);
 	else
-		ok(build(name, 1) > 0, "%s %s", t->name, name);
+		ok(build(dir, name, 1) > 0, "%s %s", t->name, name);
 }
 
 static void run(const char *name)
@@ -188,13 +201,13 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	plan_tests(num_tests + num_objs);
+	plan_tests(num_tests + num_objs + (num_objs ? 1 : 0));
 	/* First all the extra object compilations. */
 	compile_objs();
 
 	/* Do all the test compilations. */
 	for (test = tests; test; test = test->next)
-		test->type->testfn(test->type, test->name);
+		test->type->testfn(argv[1], test->type, test->name);
 
 	cleanup_objs();