Building multiple test targets

tests/.gitignore

-tests
+*.out

tests/Makefile

 INC_LIB  = $(shell find .. -name '*.a')
 LIB_DIR  = $(dir $(INC_LIB))
 LIB_NAME = $(notdir $(INC_LIB))
-INC_DIR  = ../include
+INC_DIR  = . ../include
 
 SOURCES  = $(shell find . -name '*.c')
 OBJECTS  = $(SOURCES:.c=.o)
 DEPS     = $(OBJECTS:.o=.d)
 
-TARGET   = tests
+TARGETS  = $(filter ./test_%, $(OBJECTS))
+SHARED   = $(filter-out $(TARGETS), $(OBJECTS))
 
 CC       = gcc
 CFLAGS   = -march=native -O0 -DDEBUG -ggdb3
@@ -15,17 +16,16 @@ CPPFLAGS = $(addprefix -I, $(INC_DIR)) -Wall -Wextra -pedantic
 
 .PHONY: all clean run_tests
 
-all: $(TARGET)
+all: $(OBJECTS) $(TARGETS:.o=.out)
 
-run_tests: $(TARGET)
-	@echo running tests...
-	./$<
+run_tests: all
+	@ - $(foreach T, $(TARGETS:.o=.out), ./$T;)
 
 clean:
-	rm -f $(OBJECTS) $(DEPS) $(TARGET)
+	rm -f $(OBJECTS) $(DEPS) $(TARGETS:.o=)
 
-$(TARGET): $(OBJECTS)
-	$(CC) $(CFLAGS) $(CPPFLAGS) $^ $(addprefix -L, $(LIB_DIR)) $(addprefix -l, $(LIB_NAME:lib%.a=%) $(LIB_NAME:lib%.a=%)) -o $@
+$(TARGETS:.o=.out): $(SHARED)
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(@:.out=.o) $^ $(addprefix -L, $(LIB_DIR)) $(addprefix -l, $(LIB_NAME:lib%.a=%) $(LIB_NAME:lib%.a=%)) -o $@
 
 -include $(DEPS)