1 # SPDX-License-Identifier: GPL-2.0
2 # Makefile for nolibc installation and tests
3 include ../../scripts/Makefile.include
5 # we're in ".../tools/include/nolibc"
7 srctree := $(patsubst %/tools/include/,%,$(dir $(CURDIR)))
10 # when run as make -C tools/ nolibc_<foo> the arch is not set
12 include $(srctree)/scripts/subarch.include
16 # OUTPUT is only set when run from the main makefile, otherwise
17 # it defaults to this nolibc directory.
26 nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
27 arch_file := arch-$(nolibc_arch).h
28 all_files := ctype.h errno.h nolibc.h signal.h std.h stdio.h stdlib.h string.h \
29 sys.h time.h types.h unistd.h
31 # install all headers needed to support a bare-metal compiler
37 @echo "Supported targets under nolibc:"
38 @echo " all call \"headers\""
39 @echo " clean clean the sysroot"
40 @echo " headers prepare a sysroot in tools/include/nolibc/sysroot"
41 @echo " headers_standalone like \"headers\", and also install kernel headers"
42 @echo " help this help"
44 @echo "These targets may also be called from tools as \"make nolibc_<target>\"."
46 @echo "Currently using the following variables:"
47 @echo " ARCH = $(ARCH)"
48 @echo " OUTPUT = $(OUTPUT)"
51 # Note: when ARCH is "x86" we concatenate both x86_64 and i386
53 $(Q)mkdir -p $(OUTPUT)sysroot
54 $(Q)mkdir -p $(OUTPUT)sysroot/include
55 $(Q)cp $(all_files) $(OUTPUT)sysroot/include/
56 $(Q)if [ "$(ARCH)" = "x86" ]; then \
58 's,^#ifndef _NOLIBC_ARCH_X86_64_H,#if !defined(_NOLIBC_ARCH_X86_64_H) \&\& defined(__x86_64__),' \
61 's,^#ifndef _NOLIBC_ARCH_I386_H,#if !defined(_NOLIBC_ARCH_I386_H) \&\& !defined(__x86_64__),' \
63 elif [ -e "$(arch_file)" ]; then \
66 echo "Fatal: architecture $(ARCH) not yet supported by nolibc." >&2; \
68 fi > $(OUTPUT)sysroot/include/arch.h
70 headers_standalone: headers
71 $(Q)$(MAKE) -C $(srctree) headers
72 $(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
75 $(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"