From aa9836f2092df9064c5e88bc4a492068eba852ea Mon Sep 17 00:00:00 2001
From: Gitea <gitea@fake.local>
Date: Tue, 1 Dec 2020 21:01:03 -0600
Subject: [PATCH] Makefile for kernel

---
 makefile | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100755 makefile

diff --git a/makefile b/makefile
new file mode 100755
index 0000000..c08bac2
--- /dev/null
+++ b/makefile
@@ -0,0 +1,69 @@
+DEFAULT_HOST!=../default-host.sh
+HOST?=DEFAULT_HOST
+HOSTARCH!=../target-triplet-to-arch.sh $(HOST)
+
+CFLAGS?=-O2 -g
+CPPFLAGS?=
+LDFLAGS?=
+LIBS?=
+
+DESTDIR?=
+PREFIX?=/usr/local
+EXEC_PREFIX?=$(PREFIX)
+BOOTDIR?=$(EXEC_PREFIX)/boot
+INCLUDEDIR?=$(PREFIX)/include
+
+CFLAGS:=$(CFLAGS) -ffreestanding -Wall -Wextra
+CPPFLAGS:=$(CPPFLAGS) -D__is_kernel -Iinclude
+LDFLAGS:=$(LDFLAGS)
+LIBS:=$(LIBS) -nostdlib -lk -lgcc
+
+ARCHDIR=arch/$(HOSTARCH)
+
+include $(ARCHDIR)/make.config
+
+CFLAGS:=$(CFLAGS) $(KERNEL_ARCH_CFLAGS)
+CPPFLAGS:=$(CPPFLAGS) $(KERNEL_ARCH_CPPFLAGS)
+LDFLAGS:=$(LDFLAGS) $(KERNEL_ARCH_LDFLAGS)
+LIBS:=$(LIBS) $(KERNEL_ARCH_LIBS)
+
+KERNEL_OBJS=$(KERNEL_ARCH_OBJS) kernel/kernel.o
+
+OBJS=$(ARCHDIR)/crti.o $(ARCHDIR)/crtbegin.o $(KERNEL_OBJS) $(ARCHDIR)/crtend.o $(ARCHDIR)/crtn.o
+
+LINK_LIST=$(LDFLAGS) $(ARCHDIR)/crti.o $(ARCHDIR)/crtbegin.o $(KERNEL_OBJS) $(LIBS) $(ARCHDIR)/crtend.o $(ARCHDIR)/crtn.o
+
+.PHONY: all clean install install-headers install-kernel
+.SUFFIXES: .o .c .S
+
+all: fenix.kernel
+
+fenix.kernel: $(OBJS) $(ARCHDIR)/linker.ld
+	$(CC) -T $(ARCHDIR)/linker.ld -o $@ $(CFLAGS) $(LINK_LIST)
+	#grub-file --is-x86-multiboot fenix.kernel
+
+$(ARCHDIR)/crtbegin.o $(ARCHDIR)/crtend.o:
+	OBJ=`$(CC) $(CFLAGS) $(LDFLAGS) -print-file-name=$(@F)` && cp "$$OBJ" $@
+
+.c.o:
+	$(CC) -MD -c $< -o $@ -std=c99 $(CFLAGS) $(CPPFLAGS)
+
+.S.o:
+	$(CC) -MD -c $< -o $@ $(CFLAGS) $(CPPFLAGS)
+
+clean:
+	rm -f fenix.kernel
+	rm -f $(OBJS) *.o */*.o */*/*.o
+	rm -f $(OBJS:.o=.d) *.d */*.d */*/*.d
+
+install: install-headers install-kernel
+
+install-headers:
+	mkdir -p $(DESTDIR)$(INCLUDEDIR)
+	cp -R include/. $(DESTDIR)$(INCLUDEDIR)/.
+
+install-kernel: fenix.kernel
+	mkdir -p $(DESTDIR)$(BOOTDIR)
+	cp fenix.kernel $(DESTDIR)$(BOOTDIR)
+
+-include $(OBJS:.o=.d)