finally returned strings

Makefile

@@ -3,7 +3,7 @@ TESTS=$(wildcard tests/*c) $(wildcard tests/**/*.c)
 OUTDIR=bin
 CMP=gcc
 
-all: clear_c clear_bin build_test build_lib
+all: build_test
 
 clear_c:
 	clear
@@ -19,11 +19,11 @@ clang: all
 TEST_FILE=$(OUTDIR)/kerep_test.com
 TEST_ARGS= -Wall -Wno-discarded-qualifiers $(SRC) $(TESTS) -o $(TEST_FILE)
 OPT_ARGS= -O1 -flto
-build_test:
+build_test: clear_bin
 	@echo -e '\n\e[96m----------------[build_test]----------------\e[0m'
 	$(CMP) $(OPT_ARGS) $(TEST_ARGS)
 
-build_test_dbg:
+build_test_dbg: clear_bin
 	@echo -e '\n\e[96m--------------[build_test_dbg]--------------\e[0m'
 	$(CMP) -O0 -g $(TEST_ARGS).dbg
 
@@ -40,6 +40,6 @@ LIB_FILE=kerep.so
 LIB_ARGS= -Wall -Wno-discarded-qualifiers \
 	-O1 -fPIC -shared -Wl,-soname,$(LIB_FILE)  \
 	$(SRC) $(TESTS) -o $(OUTDIR)/$(LIB_FILE)
-build_lib:
+build_lib: clear_bin
 	@echo -e '\n\e[96m-------------[build_lib]---------------\e[0m'
 	$(CMP) $(OPT_ARGS) $(LIB_ARGS)