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, 1 insertions, 31 deletions

diff --git a/src/tar.c b/src/tar.c
index 63aebe8..43a580c 100644
--- a/src/tar.c
+++ b/src/tar.c
@@ -1,36 +1,6 @@
 #include "config.h"
 #include "tar.h"
 
-
 #ifdef TEST
-
-#include "tests-lib.h"
-
-#include <stdbool.h>
-#include <stdlib.h>
-#include <assert.h>
-
-#endif
-
-
-void a(void) { }
-
-#ifdef TEST
-static void test_a(void) {
-	test_start("test_a:");
-	{
-		testing("a");
-		assert(true);
-		test_ok();
-	}
-}
-
-static void unit_tests(void) {
-	test_a();
-}
-
-int main(void) {
-	unit_tests();
-	return EXIT_SUCCESS;
-}
+void unit_tests_tar(void) {}
 #endif