fix makefile

1 files changed, 36 insertions, 24 deletions

diff --git a/makefile b/makefile
index d37b1b8..0572630 100644
--- a/makefile
+++ b/makefile
@@ -1,5 +1,7 @@
 .SUFFIXES:
+.SILENT:
 
+# Build configuration options
 CM_OPT_CC_FLAGS ?=
 CM_OPT_PANIC_NAME ?= panic_impl
 CM_OPT_RELEASE ?= 1
@@ -9,56 +11,66 @@ CM_OPT_ENABLE_SSE2 ?= 0
 CM_OPT_STANDALONE ?= 1
 
 CC ?= gcc
+PRINTF ?= printf
+RM_FLAGS = -f
 
+# Project root directory
 CM_DIR ?= $(abspath $(dir $(lastword $(MAKEFILE_LIST))))
 
-CM_SOURCE := $(CM_DIR)/cheesemap.c
-CM_OBJECT := $(CM_SOURCE:.c=.o)
-CM_DEPEND := $(CM_SOURCE:.c=.d)
+# Target: cm (cheesemap.o)
+cm = $(CM_DIR)/cheesemap.o
+cm_SOURCE = $(CM_DIR)/cheesemap.c
+cm_DEPEND = $(cm_SOURCE:.c=.d)
 
-CM_DEMO_SOURCE := $(CM_DIR)/cm-demo.c
-CM_DEMO := $(CM_DEMO_SOURCE:.c=)
-CM_DEMO_DEPEND := $(CM_DEMO_SOURCE:.c=.d)
-
-CM_CC_FLAGS := -std=gnu11 \
+cm_CFLAGS = -std=gnu11 \
 	-Wall -Wextra -Werror \
 	-MMD -MP -I$(CM_DIR)
 
-CM_CC_FLAGS += $(CM_OPT_CC_FLAGS)
-CM_CC_FLAGS += -DCM_OPT_PANIC_NAME='$(CM_OPT_PANIC_NAME)'
+cm_CFLAGS += $(CM_OPT_CC_FLAGS)
+cm_CFLAGS += -DCM_OPT_PANIC_NAME='$(CM_OPT_PANIC_NAME)'
 
 ifeq ($(CM_OPT_RELEASE),1)
-	CM_CC_FLAGS += -O2 -fno-stack-protector
+	cm_CFLAGS += -O2 -fno-stack-protector
 else
-	CM_CC_FLAGS += -g3
+	cm_CFLAGS += -g3
 endif
 
 ifeq ($(CM_OPT_ENABLE_UBSAN),1)
-	CM_CC_FLAGS += -fsanitize=undefined
+	cm_CFLAGS += -fsanitize=undefined
 endif
 
 ifeq ($(CM_OPT_ENABLE_ASAN),1)
-	CM_CC_FLAGS += -fsanitize=address
+	cm_CFLAGS += -fsanitize=address
 endif
 
 ifeq ($(CM_OPT_ENABLE_SSE2),1)
-	CM_CC_FLAGS += -DCM_OPT_ENABLE_SSE2=1 -msse2
+	cm_CFLAGS += -DCM_OPT_ENABLE_SSE2=1 -msse2
 endif
 
+# Target: cm_demo
+cm_demo = $(CM_DIR)/cm-demo
+cm_demo_SOURCE = $(CM_DIR)/cm-demo.c
+cm_demo_DEPEND = $(cm_demo_SOURCE:.c=.d)
+cm_demo_CFLAGS = $(cm_CFLAGS)
+
+-include $(cm_DEPEND) $(cm_demo_DEPEND)
+
 ifeq ($(CM_OPT_STANDALONE),1)
 .PHONY: all
-all: $(CM_OBJECT) $(CM_DEMO)
+all: $(cm) $(cm_demo)
 endif
 
-$(CM_OBJECT): $(CM_SOURCE)
-	$(CC) $(CM_CC_FLAGS) -c $< -o $@
+$(cm): $(cm_SOURCE)
+	@$(PRINTF) "  CC %s\n" "$(notdir $@)"
+	$(CC) $(cm_CFLAGS) -c $< -o $@
 
-$(CM_DEMO): $(CM_DEMO_SOURCE) $(CM_OBJECT)
-	$(CC) $(CM_CC_FLAGS) $(CM_DEMO_SOURCE) $(CM_OBJECT) -o $@
+$(cm_demo): $(cm_demo_SOURCE) $(cm)
+	@$(PRINTF) "  CC %s\n" "$(notdir $@)"
+	$(CC) $(cm_demo_CFLAGS) $^ -o $@
 
 .PHONY: clean
 clean::
-	$(RM) $(CM_OBJECT) $(CM_DEPEND)
-	$(RM) $(CM_DEMO) $(CM_DEMO_DEPEND)
-
--include $(CM_DEPEND) $(CM_DEMO_DEPEND)
+	@$(PRINTF) "  RM %s\n" "$(notdir $(cm))"
+	$(RM) $(RM_FLAGS) $(cm) $(cm_DEPEND)
+	@$(PRINTF) "  RM %s\n" "$(notdir $(cm_demo))"
+	$(RM) $(RM_FLAGS) $(cm_demo) $(cm_demo_DEPEND)