fixes in makefile

test wildcard must include non-directory wildcard.
Furthermore, `-lc` mustn't be included due to `mingw` complaining... It
was a bit stupid to include this regardless.

makefile

@@ -48,13 +48,13 @@ CFLAGS += -DNDEBUG -O2
 endif
 
 CFLAGS  += -Ilib/glad/include -Ilib/glfw/include -Ilib/libarchive/include
-LDFLAGS += -lc -lm lib/glad/gl.o lib/glfw/src/libglfw3.a
+LDFLAGS += -lm lib/glad/gl.o lib/glfw/src/libglfw3.a
 
 # get source files
 SRC := $(wildcard src/*.c) $(wildcard src/**/*.c)
 RES := $(wildcard res/*.glsl)
 ifeq ($(DEBUG),test)
-SRC := $(filter-out src/main.c, $(SRC)) $(wildcard test/**/*.c)
+SRC := $(filter-out src/main.c, $(SRC)) $(wildcard test/*.c) $(wildcard test/**/*.c)
 endif
 
 NAME += $(if $(filter 1,$(ISWIN)),.exe,)

test/dat.h

@@ -1,7 +1,7 @@
 #include <stdint.h>
 
 #include "../src/util/conf.h"
-#include "../src/util/types.h"
+#include "../src/util/intdef.h"
 #include "t_arith.h"
 #include "t_conf.h"
 #include "test.h"

test/t_arith.h

@@ -2,6 +2,7 @@
 
 #include "test.h"
 
+/* tests arithmetic shift for signed integers (rather than logical shift) */
 int test_sar(void *dat) {
 	(void)dat;
 	return assert_true(-3 >> 5 == -1);

test/t_conf.h

@@ -5,7 +5,7 @@
 #include <string.h>
 
 #include "../src/util/conf.h"
-#include "../src/util/types.h"
+#include "../src/util/intdef.h"
 #include "test.h"
 
 // Environment saver structure for conf_getpat tests