feat/kernel: Added support for Kconfig and flanterm if needed

kernel/GNUmakefile

@@ -8,19 +8,34 @@ BINDIR := bin
 
 TARGET := $(BINDIR)/emk.elf
 
+KCONFIG ?= kconfig-mconf
+CONFIG := .config
+
+ifneq ("$(wildcard $(CONFIG))","")
+    include $(CONFIG)
+endif
+
 CC := gcc
 AS := gcc
 NASM := nasm
 
-# Build mode configuration
-BUILD_MODE ?= dev
+ifeq ($(BUILD_MODE),)
+    ifeq ($(CONFIG_BUILD_MODE_DEBUG),y)
+        BUILD_MODE := debug
+    else ifeq ($(CONFIG_BUILD_MODE_RELEASE),y)
+        BUILD_MODE := release
+    else
+        BUILD_MODE := debug
+    endif
+endif
+
 ifeq ($(BUILD_MODE),release)
     CFLAGS := -Os -pipe -Wall -Wextra -Werror -std=gnu11 -ffreestanding \
               -fno-stack-protector -fno-stack-check -fno-PIC \
               -ffunction-sections -fdata-sections -m64 -march=x86-64 \
               -mno-80387 -mno-mmx -mno-sse -mno-sse2 -mno-red-zone \
               -mcmodel=kernel -fno-unwind-tables -fno-asynchronous-unwind-tables \
-              -s -Wno-unused-variable
+              -s -Wno-unused-variable -DBUILD_MODE=\"release\"
     NASMFLAGS :=
     LDFLAGS := -nostdlib -static -z max-page-size=0x1000 -Wl,--gc-sections \
                -T linker.ld -Wl,-m,elf_x86_64 -Wl,--strip-all
@@ -29,7 +44,7 @@ else
               -fno-stack-protector -fno-stack-check -fno-PIC \
               -ffunction-sections -fdata-sections -m64 -march=x86-64 \
               -mno-80387 -mno-mmx -mno-sse -mno-sse2 -mno-red-zone \
-              -mcmodel=kernel -Wno-unused-variable
+              -mcmodel=kernel -Wno-unused-variable -DBUILD_MODE=\"dev\"
     NASMFLAGS := -F dwarf -g
     LDFLAGS := -nostdlib -static -z max-page-size=0x1000 -Wl,--gc-sections \
                -T linker.ld -Wl,-m,elf_x86_64
@@ -37,14 +52,48 @@ endif
 
 CPPFLAGS := -I../external -I$(SRCDIR) -MMD -MP -DLIMINE_API_REVISION=3
 
-SRCS := $(shell find $(SRCDIR) -type f \( -name '*.c' -o -name '*.S' -o -name '*.asm' \))
-OBJS := $(patsubst %.c,$(OBJDIR)/%.o,$(filter %.c,$(SRCS))) \
-        $(patsubst %.S,$(OBJDIR)/%.o,$(filter %.S,$(SRCS))) \
-        $(patsubst %.asm,$(OBJDIR)/%.o,$(filter %.asm,$(SRCS)))
+IMPLICIT_SRCS :=
+ifeq ($(CONFIG_KERNEL_HEAP_FF),y)
+    IMPLICIT_SRCS += src/mm/heap/ff.c
+else
+    $(error Error: No heap algorithm was defined. Please run "make menuconfig" and select one.)
+endif
+
+ifeq ($(CONFIG_ENABLE_FLANTERM),y)
+    IMPLICIT_SRCS += ../external/flanterm/flanterm.c
+    IMPLICIT_SRCS += ../external/flanterm/backends/fb.c
+    CFLAGS += -I../external/flanterm/ -DFLANTERM_SUPPORT=1
+endif
+
+EXCLUDE_SRCS := \
+    src/mm/heap/ff.c \
+    ../external/flanterm/flanterm.c \
+    ../external/flanterm/backends/fb.c
+EXCLUDE_PATTERNS := $(foreach file,$(EXCLUDE_SRCS),! -path "$(file)")
+
+SRCS := $(IMPLICIT_SRCS) \
+        $(shell find $(SRCDIR) -type f \( -name '*.c' -o -name '*.S' -o -name '*.asm' \) $(EXCLUDE_PATTERNS))
+
+define src_to_obj
+$(OBJDIR)/$(patsubst ../%,%,$(1:.c=.o))
+endef
+
+define src_to_obj_s
+$(OBJDIR)/$(patsubst ../%,%,$(1:.S=.o))
+endef
+
+define src_to_obj_asm
+$(OBJDIR)/$(patsubst ../%,%,$(1:.asm=.o))
+endef
+
+OBJS := 
+OBJS += $(foreach f,$(filter %.c,$(SRCS)),$(call src_to_obj,$(f)))
+OBJS += $(foreach f,$(filter %.S,$(SRCS)),$(call src_to_obj_s,$(f)))
+OBJS += $(foreach f,$(filter %.asm,$(SRCS)),$(call src_to_obj_asm,$(f)))
 
 DEPS := $(OBJS:.o=.d)
 
-.PHONY: all clean distclean
+.PHONY: all clean distclean menuconfig
 all: $(TARGET)
 
 $(OBJDIR) $(BINDIR):
@@ -54,16 +103,31 @@ $(TARGET): $(OBJS) | $(BINDIR)
 	@echo "  LD    $@"
 	@$(CC) $(LDFLAGS) -o $@ $(OBJS)
 
+$(OBJDIR)/%.o: ../%.c | $(OBJDIR)
+	@mkdir -p $(dir $@)
+	@echo "  CC    ../$*"
+	@$(CC) $(CPPFLAGS) $(CFLAGS) -c ../$*.c -o $@
+
 $(OBJDIR)/%.o: %.c | $(OBJDIR)
 	@mkdir -p $(dir $@)
 	@echo "  CC    $<"
 	@$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
 
+$(OBJDIR)/%.o: ../%.S | $(OBJDIR)
+	@mkdir -p $(dir $@)
+	@echo "  AS    ../$*"
+	@$(AS) $(CPPFLAGS) $(CFLAGS) -c ../$*.S -o $@
+
 $(OBJDIR)/%.o: %.S | $(OBJDIR)
 	@mkdir -p $(dir $@)
 	@echo "  AS    $<"
 	@$(AS) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
 
+$(OBJDIR)/%.o: ../%.asm | $(OBJDIR)
+	@mkdir -p $(dir $@)
+	@echo "  NASM  ../$*"
+	@$(NASM) $(NASMFLAGS) ../$*.asm -o $@
+
 $(OBJDIR)/%.o: %.asm | $(OBJDIR)
 	@mkdir -p $(dir $@)
 	@echo "  NASM  $<"
@@ -77,4 +141,7 @@ distclean: clean
 	@echo "  DISTCLEAN"
 	@rm -rf $(BINDIR)
 
--include $(DEPS)
+menuconfig: clean
+	@$(KCONFIG) Kconfig
+
+-include $(DEPS)