144 lines
3.0 KiB
Makefile
144 lines
3.0 KiB
Makefile
# Settings for architecture
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DEFAULT_HOST!=../default-host.sh
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HOST?=DEFAULT_HOST
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HOSTARCH!=../target-triplet-to-arch.sh $(HOST)
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# Compiler and linker flags.
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CFLAGS?=-g
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CPPFLAGS?=
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LDFLAGS?=
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LIBS?=
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# Destination directories in sysroot.
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DESTDIR?=
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PREFIX?=/usr/local
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EXEC_PREFIX?=$(PREFIX)
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BOOTDIR?=$(PREFIX)/boot
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INCLUDEDIR?=$(PREFIX)/include
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# Updated compiler flags
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CFLAGS:=$(CFLAGS) -ffreestanding -D__is_kernel -Iinclude -Wall -Wextra -Werror
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CPPFLAGS:=$(CPPFLAGS)
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LDFLAGS:=$(LDFLAGS)
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LIB_INCLUDE_FLAGS=-L./lib/so
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LIBS:=$(LIBS) -nostdlib -lgcc -lklib #-lk -lgcc
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# Current architecture directory
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ARCHDIR=arch/$(HOSTARCH)
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# Directory for architecture
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include $(ARCHDIR)/make.config
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# Updated compiler flags with architecture settings added
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CFLAGS:=$(CFLAGS) $(KERNEL_ARCH_CFLAGS)
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CPPFLAGS:=$(CPPFLAGS) $(KERNEL_ARCH_CPPFLAGS)
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LDFLAGS:=$(LDFLAGS) $(KERNEL_ARCH_LDFLAGS)
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LIBS:=$(LIBS) $(KERNEL_ARCH_LIBS)
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# Main kernel objects and architecture objects
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KERNEL_OBJS=\
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$(KERNEL_ARCH_OBJS) \
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kernel/kernel.o \
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# Module directories
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SPECIAL_DIRS=arch include kernel lib
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MODULE_DIRS=$(filter-out $(SPECIAL_DIRS), $(wildcard *))
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MODULE_DIRS:=$(filter-out $(wildcard Makefile*), $(MODULE_DIRS))
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# Module Makefile, knows how to build each module
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MODULE_MAKEFILE=Makefile.Module
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# Module objects
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MODULE_OBJS=$(foreach MODULE, $(MODULE_DIRS), $(wildcard $(MODULE)/*.o))
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# Overall objects
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OBJS= \
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$(ARCHDIR)/crti.o \
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$(ARCHDIR)/crtbegin.o \
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$(KERNEL_OBJS) \
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$(ARCHDIR)/crtend.o \
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$(ARCHDIR)/crtn.o \
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# Link list, embeds C run time objects and kernel objects.
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LINK_LIST= \
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$(LDFLAGS) \
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$(ARCHDIR)/crti.o \
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$(ARCHDIR)/crtbegin.o \
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$(KERNEL_OBJS) \
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$(ARCHDIR)/crtend.o \
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$(ARCHDIR)/crtn.o \
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.PHONY: all clean install install-headers install-kernel module_all \
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module_clean library_all library_clean
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.SUFFIXES: .o .c .S
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all: os.kernel
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module_all:
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@echo
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$(foreach MODULE, $(MODULE_DIRS), \
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cp $(MODULE_MAKEFILE) $(MODULE)/Makefile; \
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$(MAKE) -C $(MODULE); \
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$(RM) $(MODULE)/Makefile; \
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echo; \
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)
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module_clean:
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@echo
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$(foreach MODULE, $(MODULE_DIRS), \
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cp $(MODULE_MAKEFILE) $(MODULE)/Makefile; \
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$(MAKE) -C $(MODULE) clean; \
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$(RM) $(MODULE)/Makefile; \
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echo; \
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)
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library_all:
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$(MAKE) -C lib
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library_clean:
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$(MAKE) -C lib clean
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os.kernel: library_all module_all $(OBJS) $(ARCHDIR)/linker.ld
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$(CC) -T $(ARCHDIR)/linker.ld -o $@ $(CFLAGS) $(LINK_LIST) $(MODULE_OBJS) \
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$(LIB_INCLUDE_FLAGS) $(LIBS)
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grub-file --is-x86-multiboot os.kernel
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$(ARCHDIR)/crtbegin.o $(ARCHDIR)/crtend.o:
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OBJ=`$(CC) $(CFLAGS) $(LDFLAGS) -print-file-name=$(@F)` && cp "$$OBJ" $@
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.c.o:
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$(CC) -MD -c $< -o $@ -std=gnu11 $(CFLAGS) $(CPPFLAGS)
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.S.o:
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$(CC) -MD -c $< -o $@ $(CFLAGS) $(CPPFLAGS)
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clean: library_clean module_clean
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rm -f os.kernel*
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rm -f $(OBJS) *.o */*.o */*/*.o
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rm -f $(OBJS:.o=.d) *.d */*.d */*/*.d
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install: install-headers install-kernel
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install-headers:
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mkdir -p $(DESTDIR)$(INCLUDEDIR)
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cp -R --preserve=timestamps include/. $(DESTDIR)$(INCLUDEDIR)/.
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install-kernel: os.kernel
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mkdir -p $(DESTDIR)$(BOOTDIR)
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cp os.kernel $(DESTDIR)$(BOOTDIR)
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-include $(OBJS:.o=.d)
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