[UNTESTED] moved library into a single header, added basic SPSC test

Makefile

@@ -1,22 +1,23 @@
-LIB_NAME      ?= weaver
 BUILD_DIR     ?= build
-SRC_DIR       ?= src
-INCLUDE_DIRS  := include src/include
+DEPS_DIR      ?= $(BUILD_DIR)/deps
+TEST_DIR      ?= tests
+INCLUDE_DIR   := include
 
 MODE          ?= debug
 
-RELEASE_OPT   ?= 2
+RELEASE_OPT   ?= 3
 CLINE_SIZE    ?= 64
 
 CXX           ?= clang++
 AR            ?= ar
 ARFLAGS       := rcs
 
-SRCS := $(shell find $(SRC_DIR) -name '*.cc')
-OBJS := $(patsubst $(SRC_DIR)/%.cc,$(BUILD_DIR)/%.o,$(SRCS))
-DEPS := $(OBJS:.o=.d)
+TESTS := $(shell find $(TEST_DIR) -name '*.cc')
 
-INCLUDES := $(addprefix -I,$(INCLUDE_DIRS))
+TEST_BINS := $(patsubst $(TEST_DIR)/%.cc,$(BUILD_DIR)/tests/%,$(TESTS))
+TEST_DEPS := $(patsubst $(TEST_DIR)/%.cc,$(DEPS_DIR)/tests/%.d,$(TESTS))
+
+INCLUDES := $(addprefix -I,$(INCLUDE_DIR))
 
 WARN_FLAGS := \
 	-Wall \
@@ -26,7 +27,6 @@ WARN_FLAGS := \
 
 COMMON_CXXFLAGS := \
 	-std=c++20 \
-	-MMD -MP \
 	-flto \
 	--param=destructive-interference-size=$(CLINE_SIZE) \
 	$(WARN_FLAGS) \
@@ -50,21 +50,17 @@ else
 	$(error Unknown MODE '$(MODE)'; use MODE=debug or MODE=release)
 endif
 
-LIB := $(BUILD_DIR)/lib$(LIB_NAME).a
+.PHONY: all clean tests
 
-.PHONY: all clean
+all: tests
+tests: $(TEST_BINS)
 
-all: $(LIB)
-
-$(LIB): $(OBJS)
-	@mkdir -p $(dir $@/bin)
-	$(AR) $(ARFLAGS) $@/bin $^
-
-$(BUILD_DIR)/%.o: $(SRC_DIR)/%.cc
+$(BUILD_DIR)/tests/%: $(TEST_DIR)/%.cc
 	@mkdir -p $(dir $@)
-	$(CXX) $(CXXFLAGS) -c $< -o $@
-
--include $(DEPS)
+	@mkdir -p $(DEPS_DIR)/tests/$(dir $*)
+	$(CXX) $(CXXFLAGS) -MMD -MP -MF $(DEPS_DIR)/tests/$*.d $< -o $@
 
 clean:
 	rm -rf $(BUILD_DIR)
+
+-include $(TEST_DEPS)