Try to document some more obtuse parts of the makefile
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K. Lange
parent
238c1fcad0
commit
20a390ee01
53
Makefile
53
Makefile
@ -17,6 +17,8 @@ endif
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# Disable built-in rules
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.SUFFIXES:
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all: image.iso
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TARGET_TRIPLET=i686-pc-toaru
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# Userspace flags
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@ -26,25 +28,37 @@ AR=$(TARGET_TRIPLET)-ar
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AS=$(TARGET_TRIPLET)-as
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CFLAGS= -O3 -g -std=gnu99 -I. -Iapps -pipe -mmmx -msse -msse2 -fplan9-extensions -Wall -Wextra -Wno-unused-parameter
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##
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# C library objects from libc/ C sources (and setjmp, which is assembly)
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LIBC_OBJS = $(patsubst %.c,%.o,$(wildcard libc/*.c))
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LIBC_OBJS += $(patsubst %.c,%.o,$(wildcard libc/*/*.c))
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LIBC_OBJS += libc/setjmp.o
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LC=base/lib/libc.so
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##
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# APPS = C sources from apps/
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# APPS_X = binaries
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# APPS_Y = generated makefiles for binaries (except init)
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# APPS_SH = shell scripts to copy to base/bin/ and mark executable
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# APPS_SH_X = destinations for shell scripts
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APPS=$(patsubst apps/%.c,%,$(wildcard apps/*.c))
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APPS_X=$(foreach app,$(APPS),base/bin/$(app))
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APPS_Y=$(foreach app,$(filter-out init,$(APPS)),.make/$(app).mak)
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APPS_SH=$(patsubst apps/%.sh,%.sh,$(wildcard apps/*.sh))
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APPS_SH_X=$(foreach app,$(APPS_SH),base/bin/$(app))
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##
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# LIBS = C sources from lib/
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# LIBS_X = Shared libraries (.so)
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# LIBS_Y = Generated makefiles for libraries
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LIBS=$(patsubst lib/%.c,%,$(wildcard lib/*.c))
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LIBS_X=$(foreach lib,$(LIBS),base/lib/libtoaru_$(lib).so)
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LIBS_Y=$(foreach lib,$(LIBS),.make/$(lib).lmak)
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##
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# Files that must be present in the ramdisk (apps, libraries)
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RAMDISK_FILES= ${APPS_X} ${APPS_SH_X} ${LIBS_X} base/lib/ld.so base/lib/libm.so
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all: image.iso
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# Kernel / module flags
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KCC = $(TARGET_TRIPLET)-gcc
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@ -60,10 +74,14 @@ KCFLAGS += -D_KERNEL_
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KCFLAGS += -DKERNEL_GIT_TAG=$(shell util/make-version)
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KASFLAGS = --32
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##
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# Kernel objects from kernel/ C sources
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KERNEL_OBJS = $(patsubst %.c,%.o,$(wildcard kernel/*.c))
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KERNEL_OBJS += $(patsubst %.c,%.o,$(wildcard kernel/*/*.c))
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KERNEL_OBJS += $(patsubst %.c,%.o,$(wildcard kernel/*/*/*.c))
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##
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# Kernel objects from kernel/ assembly sources
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KERNEL_ASMOBJS = $(filter-out kernel/symbols.o,$(patsubst %.S,%.o,$(wildcard kernel/*.S)))
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# Kernel
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@ -71,6 +89,14 @@ KERNEL_ASMOBJS = $(filter-out kernel/symbols.o,$(patsubst %.S,%.o,$(wildcard ker
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fatbase/kernel: ${KERNEL_ASMOBJS} ${KERNEL_OBJS} kernel/symbols.o
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${KCC} -T kernel/link.ld ${KCFLAGS} -nostdlib -o $@ ${KERNEL_ASMOBJS} ${KERNEL_OBJS} kernel/symbols.o -lgcc
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##
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# Symbol table for the kernel. Instead of relying on getting
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# the symbol table from our bootloader (eg. through ELF
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# headers provided via multiboot structure), we have a dedicated
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# object that build with all the symbols. This allows us to
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# build the kernel as a flat binary or load it with less-capable
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# multiboot loaders and still get symbols, which we need to
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# load kernel modules and link them properly.
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kernel/symbols.o: ${KERNEL_ASMOBJS} ${KERNEL_OBJS} util/generate_symbols.py
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-rm -f kernel/symbols.o
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${KCC} -T kernel/link.ld ${KCFLAGS} -nostdlib -o .toaruos-kernel ${KERNEL_ASMOBJS} ${KERNEL_OBJS} -lgcc
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@ -78,6 +104,9 @@ kernel/symbols.o: ${KERNEL_ASMOBJS} ${KERNEL_OBJS} util/generate_symbols.py
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${KAS} ${KASFLAGS} kernel/symbols.S -o $@
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-rm -f .toaruos-kernel
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##
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# version.o should be rebuilt whenever the kernel changes
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# in order to get fresh git commit hash information.
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kernel/sys/version.o: kernel/*/*.c kernel/*.c
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kernel/%.o: kernel/%.S
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@ -91,8 +120,9 @@ kernel/%.o: kernel/%.c ${HEADERS}
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fatbase/mod:
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@mkdir -p $@
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##
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# Modules need to be installed on the boot image
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MODULES = $(patsubst modules/%.c,fatbase/mod/%.ko,$(wildcard modules/*.c))
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HEADERS = $(shell find base/usr/include/kernel -type f -name '*.h')
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fatbase/mod/%.ko: modules/%.c ${HEADERS} | fatbase/mod
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@ -203,12 +233,22 @@ image.iso: ${EFI_BOOT} cdrom/boot.sys fatbase/netinit ${MODULES} util/update-ext
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# Boot loader
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##
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# FAT EFI payload
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# This is the filesystem the EFI loaders see, so it must contain
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# the kernel, modules, and ramdisk, plus anything else we want
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# available to the bootloader (eg., netinit).
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cdrom/fat.img: fatbase/ramdisk.img ${MODULES} fatbase/kernel fatbase/netinit fatbase/efi/boot/bootia32.efi fatbase/efi/boot/bootx64.efi util/mkdisk.sh
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util/mkdisk.sh $@ fatbase
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##
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# For EFI, we build two laoders: ia32 and x64
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# We build them as ELF shared objects and the use objcopy to convert
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# them to PE executables / DLLs (as expected by EFI).
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EFI_CFLAGS=-fno-stack-protector -fpic -DEFI_PLATFORM -ffreestanding -fshort-wchar -I /usr/include/efi -mno-red-zone
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EFI_SECTIONS=-j .text -j .sdata -j .data -j .dynamic -j .dynsym -j .rel -j .rela -j .reloc
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# ia32
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boot/efi.so: boot/cstuff.c boot/*.h
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$(CC) ${EFI_CFLAGS} -I /usr/include/efi/ia32 -c -o boot/efi.o $<
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$(LD) boot/efi.o /usr/lib32/crt0-efi-ia32.o -nostdlib -znocombreloc -T /usr/lib32/elf_ia32_efi.lds -shared -Bsymbolic -L /usr/lib32 -lefi -lgnuefi -o boot/efi.so
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@ -216,6 +256,7 @@ boot/efi.so: boot/cstuff.c boot/*.h
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fatbase/efi/boot/bootia32.efi: boot/efi.so
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objcopy ${EFI_SECTIONS} --target=efi-app-ia32 $< $@
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# x64
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boot/efi64.so: boot/cstuff.c boot/*.h
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gcc ${EFI_CFLAGS} -I /usr/include/efi/x86_64 -DEFI_FUNCTION_WRAPPER -c -o boot/efi64.o $<
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$(LD) boot/efi64.o /usr/lib/crt0-efi-x86_64.o -nostdlib -znocombreloc -T /usr/lib/elf_x86_64_efi.lds -shared -Bsymbolic -L /usr/lib -lefi -lgnuefi -o boot/efi64.so
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@ -223,6 +264,7 @@ boot/efi64.so: boot/cstuff.c boot/*.h
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fatbase/efi/boot/bootx64.efi: boot/efi64.so
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objcopy ${EFI_SECTIONS} --target=efi-app-x86_64 $< $@
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# BIOS loader
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cdrom/boot.sys: boot/boot.o boot/cstuff.o boot/link.ld | dirs
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${KLD} -T boot/link.ld -o $@ boot/boot.o boot/cstuff.o
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@ -291,6 +333,7 @@ efi64: image.iso
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qemu-system-x86_64 -cdrom $< ${QEMU_ARGS} \
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-bios /usr/share/qemu/OVMF.fd
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VMNAME=ToaruOS-NIH CD
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define virtualbox-runner =
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@ -309,6 +352,7 @@ $(eval $(call virtualbox-runner,virtualbox,"Other",))
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$(eval $(call virtualbox-runner,virtualbox-efi,"Other",--firmware efi))
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$(eval $(call virtualbox-runner,virtualbox-efi64,"Other_64",--firmware efi))
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##
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# Optional Extensions
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#
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# These optional extension libraries require third-party components to build,
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@ -326,5 +370,8 @@ ifeq (,$(findstring clean,$(MAKECMDGOALS)))
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-include ${EXT_LIBS_Y}
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endif
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# Freetype: Terminal text rendering backend
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ext-freetype: base/lib/libtoaru_ext_freetype_fonts.so
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# Cairo: Compositor rendering backend
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ext-cairo: base/lib/libtoaru_ext_cairo_renderer.so
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