From 1532ecc992ddd72cd370ee8bf32e27119303c2eb Mon Sep 17 00:00:00 2001
From: _ov4 <ov4@ov4.org>
Date: Sun, 6 Sep 2026 14:38:35 +0000
Subject: refactor makefile

---
 Makefile | 92 ++++++++++++++++++++++++++++++++++++++++++----------------------
 1 file changed, 61 insertions(+), 31 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index a58f7fb..81edbdd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,54 +1,76 @@
 CC = gcc
-CXX = g++
-SRC_DIR = src
-INCLUDE_DIR = include
-BUILD = build
-TARGET = $(BUILD)/ccshell
+CXX ?= g++
 
-DEPS_DIR = third_party
-MAGIC_ENUM_DIR = $(DEPS_DIR)/magic_enum
+SRC_DIR := src
+INCLUDE_DIR := include
+BUILD_ROOT := build
+
+DEPS_DIR := third_party
+MAGIC_ENUM_DIR := $(DEPS_DIR)/magic_enum
 
 MAKEFLAGS += -j8
 
-CPPFLAGS = -I$(INCLUDE_DIR) -MMD -MP -flto
-CXXFLAGS = -std=c++23 -Wall -Wextra -O3 -flto
-CPPFLAGS += -I$(MAGIC_ENUM_DIR)/include
+#   make                # release：-O3 + LTO
+#   make DEBUG=1        # debug: -Og -g3 and no LTO
+#   make STATIC=1       # static (maybe tricky)
+DEBUG  ?= 0
+LTO    ?= 1
+STATIC ?= 0
+
+ifeq ($(DEBUG),0)
+    # release
+    CONFIG := release
+    OPTFLAGS := -O3 -DNDEBUG
+else
+    # debug
+    LTO := 0
+    CONFIG   := debug
+    OPTFLAGS := -Og
+    OPTFLAGS += -g3 -fno-omit-frame-pointer -D_GLIBCXX_ASSERTIONS
+endif
+
+ifeq ($(LTO),1)
+    LTOFLAGS := -flto=auto
+endif
+
+BUILD  := $(BUILD_ROOT)/$(CONFIG)
+TARGET := $(BUILD)/ccshell
+
+WARNFLAGS := -Wall -Wextra
 
+ALL_CPPFLAGS := -I$(INCLUDE_DIR) -I$(MAGIC_ENUM_DIR)/include -MMD -MP $(CPPFLAGS)
+ALL_CXXFLAGS := -std=c++23 $(WARNFLAGS) $(OPTFLAGS) $(LTOFLAGS) $(CXXFLAGS)
+ALL_LDFLAGS  := $(OPTFLAGS) $(LTOFLAGS)
 
 TARGET_OS ?= $(shell uname -s)
 
-ifeq ($(TARGET_OS),Linux)
-    LDFLAGS += -static -static-libgcc -static-libstdc++
-else ifeq ($(TARGET_OS),Darwin)
-    # empty
-else
-    # empty
+ifeq ($(STATIC),1)
+    ifeq ($(TARGET_OS),Linux)
+        LDFLAGS += -static -static-libgcc -static-libstdc++
+    else ifeq ($(TARGET_OS),Darwin)
+        # empty
+    else
+        # empty
+    endif
 endif
 
-SRCS = $(shell find $(SRC_DIR) -name '*.cc')
-OBJS = $(SRCS:%=$(BUILD)/%.o)
-DEPS = $(OBJS:.o=.d)
+ALL_LDFLAGS += $(LDFLAGS) $(EXTRA_LDFLAGS)
+
+SRCS := $(shell find $(SRC_DIR) -name '*.cc')
+OBJS := $(SRCS:%=$(BUILD)/%.o)
+DEPS := $(OBJS:.o=.d)
 
 $(TARGET): $(OBJS)
 	@mkdir -p $(dir $@)
-	$(CXX) $(LDFLAGS) $^ $(LDLIBS) -o $@
+	$(CXX) $(ALL_LDFLAGS) $^ $(LDLIBS) -o $@
 
 $(BUILD)/%.cc.o: %.cc
 	@mkdir -p $(dir $@)
-	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@
+	$(CXX) $(ALL_CPPFLAGS) $(ALL_CXXFLAGS) -c $< -o $@
 
 -include $(DEPS)
 
-clean:
-	rm -rf $(BUILD)
-
-fresh:
-	rm -rf $(BUILD)
-	make
-
-.PHONY: clean
-
-.PHONY: magic-enum
+.PHONY: clean fresh magic-enum 
 
 magic-enum:
 	@mkdir -p $(DEPS_DIR)
@@ -57,3 +79,11 @@ magic-enum:
 	else \
 		git clone --depth 1 https://github.com/Neargye/magic_enum.git "$(MAGIC_ENUM_DIR)" -b master --single-branch; \
 	fi
+
+clean:
+	rm -rf $(BUILD_ROOT)
+
+fresh:
+	$(MAKE) clean
+	$(MAKE)
+
-- 
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