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# SPDX-License-Identifier: GPL-2.0
# Makefile for nolibc installation and tests
include ../../scripts/Makefile.include
# we're in ".../tools/include/nolibc"
ifeq ($(srctree),)
srctree := $(patsubst %/tools/include/,%,$(dir $(CURDIR)))
endif
# when run as make -C tools/ nolibc_<foo> the arch is not set
ifeq ($(ARCH),)
include $(srctree)/scripts/subarch.include
ARCH = $(SUBARCH)
endif
# OUTPUT is only set when run from the main makefile, otherwise
# it defaults to this nolibc directory.
OUTPUT ?= $(CURDIR)/
architectures := \
alpha \
arm \
arm64 \
hexagon \
loongarch \
m68k \
mips \
openrisc \
parisc \
powerpc \
riscv \
s390 \
sh \
sparc \
x86 \
arch_files := arch.h $(addsuffix .h, $(addprefix arch-, $(architectures)))
all_files := \
alloca.h \
assert.h \
byteswap.h \
compiler.h \
crt.h \
ctype.h \
dirent.h \
elf.h \
endian.h \
err.h \
errno.h \
fcntl.h \
getopt.h \
inttypes.h \
limits.h \
math.h \
nolibc.h \
poll.h \
sched.h \
signal.h \
stackprotector.h \
std.h \
stdarg.h \
stdbool.h \
stddef.h \
stdint.h \
stdlib.h \
string.h \
sys.h \
sys/auxv.h \
sys/ioctl.h \
sys/mman.h \
sys/mount.h \
sys/prctl.h \
sys/ptrace.h \
sys/random.h \
sys/reboot.h \
sys/resource.h \
sys/select.h \
sys/sendfile.h \
sys/stat.h \
sys/syscall.h \
sys/sysmacros.h \
sys/time.h \
sys/timerfd.h \
sys/types.h \
sys/uio.h \
sys/utsname.h \
sys/wait.h \
time.h \
types.h \
unistd.h \
stdio.h \
# install all headers needed to support a bare-metal compiler
all: headers
install: help
help:
@echo "Supported targets under nolibc:"
@echo " all call \"headers\""
@echo " clean clean the sysroot"
@echo " headers prepare a multi-arch sysroot in \$${OUTPUT}sysroot"
@echo " headers_standalone like \"headers\", and also install kernel headers"
@echo " help this help"
@echo ""
@echo "These targets may also be called from tools as \"make nolibc_<target>\"."
@echo ""
@echo "Currently using the following variables:"
@echo " ARCH = $(ARCH)"
@echo " OUTPUT = $(OUTPUT)"
@echo ""
# installs headers for all archs at once.
headers:
$(Q)mkdir -p "$(OUTPUT)sysroot/include"
$(Q)cp --parents $(arch_files) $(all_files) "$(OUTPUT)sysroot/include/"
headers_standalone: headers
$(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
CFLAGS_s390 := -m64
CFLAGS := $(CFLAGS_$(ARCH))
headers_check: headers_standalone
$(Q)for header in $(filter-out crt.h std.h,$(all_files)); do \
$(CC) $(CFLAGS) $(CLANG_CROSS_FLAGS) -Wall -Werror -nostdinc -fsyntax-only -x c /dev/null \
-I$(or $(objtree),$(srctree))/usr/include -include $$header -include $$header || exit 1; \
done
clean:
$(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"
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