Have a single top-level main for running unit-tests

Instead of each .c file becoming a self-standing .t executable file,
and being run for executing the unit tests local to the file, now each
.c becomes a .to object (akin to a .o object, but one where the -DTEST
flag is given to the compiler).  After that, all the .to objects are
linked together in a gistatic-tests executable, in a equivalent way
that all .o files get linked together in a gistatic executable.

This change was necessary in order to allow dependencies between
objects.  The next task will be making a tar of a repository tree
checkout, and src/gistatic.{o,to} will start depending on
src/tar.{o,to}.  If each file has its own main function when -DTEST is
given, then I wont be able to link them together.

I took the opportunity that I had to change the Makefile, and I
improved the dependency between targets and dependencies greatly.  From
what I can tell now, it is correct.

1 files changed, 37 insertions, 27 deletions

diff --git a/Makefile b/Makefile
index 607f910..7f6c4e9 100644
--- a/Makefile
+++ b/Makefile
@@ -9,13 +9,13 @@ TRANSLATIONS = pt fr eo
 CONTRIBLANGS =
 LDLIBS       = -lgit2
 
-.SUFFIXES: .in .t
+.SUFFIXES: .in .to
 
 .in:
 	sed -e 's:@VERSION@:$(VERSION):g' -e 's:@DATE@:$(DATE):g' < $< > $@
 
-.c.t:
-	$(CC) $(CFLAGS) $(LDFLAGS) -DTEST -o $@ $< src/tests-lib.o $(LDLIBS)
+.c.to:
+	$(CC) $(CFLAGS) $(LDFLAGS) -DTEST -o $@ -c $< $(LDLIBS)
 
 
 manpages.en.in = \
@@ -29,50 +29,60 @@ manpages = $(manpages.in:.in=)
 sources = \
 	src/tar.c \
 	src/gistatic.c
-objects = $(sources:.c=.o)
-tests   = $(sources:.c=.t)
+lib-objects = $(sources:.c=.o)
+all-objects = $(lib-objects) src/main.o
+t-objects   = $(sources:.c=.to) src/tests-lib.to src/main.to
 
 
-all: src/config.h src/tests-lib.o src/gistatic libgistatic.a $(manpages)
+all: gistatic libgistatic.a $(manpages)
 
+gistatic: $(all-objects)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(all-objects) $(LDLIBS)
 
-src/gistatic: $(objects) src/main.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(objects) src/main.o $(LDLIBS)
+gistatic-tests: $(t-objects)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(t-objects) $(LDLIBS)
 
-libgistatic.a: $(objects)
-	$(AR) $(ARFLAGS) $@ $(objects)
+libgistatic.a: $(lib-objects)
+	$(AR) $(ARFLAGS) $@ $(lib-objects)
 
 src/config.h:
-	touch $@
 	printf '#ifndef GISTATIC_CONFIG_H\n'            >> $@
 	printf '#define GISTATIC_CONFIG_H\n\n'          >> $@
 	printf '#define _POSIX_C_SOURCE 200809L\n'      >> $@
 	printf '#define VERSION         "$(VERSION)"\n' >> $@
 	printf '#define DATE            "$(DATE)"\n'    >> $@
-	printf '\n#endif\n'                             >> $@
+	printf '\n'                                     >> $@
+	printf '#endif\n'                               >> $@
 
-$(objects): src/config.h
-$(tests):   src/config.h src/tests-lib.h src/tests-lib.o
-src/gistatic.o: src/gistatic.h src/tar.o src/tar.h
-src/main.o: src/gistatic.h src/gistatic.o
+$(all-objects) $(t-objects): src/config.h
+src/tests-lib.to: src/tests-lib.h
+src/tar.o src/tar.to: src/tar.h
+src/gistatic.o src/gistatic.to: src/gistatic.h
+src/gistatic.o: src/tar.o
+src/gistatic.to: src/tar.to
+src/main.o src/main.to: src/tar.h src/gistatic.h
+src/main.o: src/tar.o src/gistatic.o
+src/main.to: src/tar.to src/gistatic.to
 
+tests/resources/repositories/repo-1/.git \
+tests/resources/repositories/repo-2/.git:
+	ln -s .gitdir $@
 
-check: all $(tests)
-	rm -f tests/resources/repositories/repo-1/.git
-	rm -f tests/resources/repositories/repo-2/.git
-	ln -s .gitdir tests/resources/repositories/repo-1/.git
-	ln -s .gitdir tests/resources/repositories/repo-2/.git
+check: all gistatic-tests \
+		tests/resources/repositories/repo-1/.git \
+		tests/resources/repositories/repo-2/.git
 	sh tests/build-sample.sh
-	for t in $(tests); do ./$$t; done
+	./gistatic-tests
 	sh tests/assert-catgets.sh src/*.c
 	sh tests/integration.sh
 	sh tests/c-lint.sh src/*.c
 
 clean:
-	rm -rf public/ $(manpages) README.*.md CHANGELOG.*.md messages.mo \
-		vgcore.* tmp/ src/config.h                 \
-		src/*.o src/*.t src/gistatic libgistatic.a \
-		tests/resources/repositories/repo-1/.git   \
+	rm -rf \
+		public/ $(manpages) README.*.md CHANGELOG.*.md messages.mo \
+		vgcore.* tmp/ src/config.h src/*.o src/*.to                \
+		libgistatic.a gistatic gistatic-tests                      \
+		tests/resources/repositories/repo-1/.git                   \
 		tests/resources/repositories/repo-2/.git
 
 install: all
@@ -80,7 +90,7 @@ install: all
 		$(DESTDIR)$(PREFIX)/bin \
 		$(DESTDIR)$(PREFIX)/lib \
 		$(DESTDIR)$(PREFIX)/include
-	cp src/gistatic   $(DESTDIR)$(PREFIX)/bin
+	cp gistatic       $(DESTDIR)$(PREFIX)/bin
 	cp libgistatic.a  $(DESTDIR)$(PREFIX)/lib
 	cp src/gistatic.h $(DESTDIR)$(PREFIX)/include
 	sh doc/manpages.sh -ip $(DESTDIR)$(MANPREFIX) $(manpages)