xref: /linux/tools/include/nolibc/Makefile (revision 542fed2ef2ff7e580cc25efb174f5e1237e3b0eb) 
1# SPDX-License-Identifier: GPL-2.0
2# Makefile for nolibc installation and tests
3include ../../scripts/Makefile.include
4
5# we're in ".../tools/include/nolibc"
6ifeq ($(srctree),)
7srctree := $(patsubst %/tools/include/,%,$(dir $(CURDIR)))
8endif
9
10# when run as make -C tools/ nolibc_<foo> the arch is not set
11ifeq ($(ARCH),)
12include $(srctree)/scripts/subarch.include
13ARCH = $(SUBARCH)
14endif
15
16# OUTPUT is only set when run from the main makefile, otherwise
17# it defaults to this nolibc directory.
18OUTPUT ?= $(CURDIR)/
19
20architectures := \
21		alpha \
22		arm \
23		arm64 \
24		hexagon \
25		loongarch \
26		m68k \
27		mips \
28		openrisc \
29		parisc \
30		powerpc \
31		riscv \
32		s390 \
33		sh \
34		sparc \
35		x86 \
36
37arch_files := arch.h $(addsuffix .h, $(addprefix arch-, $(architectures)))
38all_files := \
39		alloca.h \
40		assert.h \
41		byteswap.h \
42		compiler.h \
43		crt.h \
44		ctype.h \
45		dirent.h \
46		elf.h \
47		endian.h \
48		err.h \
49		errno.h \
50		fcntl.h \
51		getopt.h \
52		inttypes.h \
53		limits.h \
54		math.h \
55		nolibc.h \
56		poll.h \
57		sched.h \
58		signal.h \
59		stackprotector.h \
60		std.h \
61		stdarg.h \
62		stdbool.h \
63		stddef.h \
64		stdint.h \
65		stdlib.h \
66		string.h \
67		sys.h \
68		sys/auxv.h \
69		sys/ioctl.h \
70		sys/mman.h \
71		sys/mount.h \
72		sys/prctl.h \
73		sys/ptrace.h \
74		sys/random.h \
75		sys/reboot.h \
76		sys/resource.h \
77		sys/select.h \
78		sys/sendfile.h \
79		sys/stat.h \
80		sys/syscall.h \
81		sys/sysmacros.h \
82		sys/time.h \
83		sys/timerfd.h \
84		sys/types.h \
85		sys/uio.h \
86		sys/utsname.h \
87		sys/wait.h \
88		time.h \
89		types.h \
90		unistd.h \
91		stdio.h \
92
93
94# install all headers needed to support a bare-metal compiler
95all: headers
96
97install: help
98
99help:
100	@echo "Supported targets under nolibc:"
101	@echo "  all                 call \"headers\""
102	@echo "  clean               clean the sysroot"
103	@echo "  headers             prepare a multi-arch sysroot in \$${OUTPUT}sysroot"
104	@echo "  headers_standalone  like \"headers\", and also install kernel headers"
105	@echo "  help                this help"
106	@echo ""
107	@echo "These targets may also be called from tools as \"make nolibc_<target>\"."
108	@echo ""
109	@echo "Currently using the following variables:"
110	@echo "  ARCH    = $(ARCH)"
111	@echo "  OUTPUT  = $(OUTPUT)"
112	@echo ""
113
114# installs headers for all archs at once.
115headers:
116	$(Q)mkdir -p "$(OUTPUT)sysroot/include"
117	$(Q)cp --parents $(arch_files) $(all_files) "$(OUTPUT)sysroot/include/"
118
119headers_standalone: headers
120	$(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
121
122CFLAGS_s390 := -m64
123CFLAGS := $(CFLAGS_$(ARCH))
124
125headers_check: headers_standalone
126	$(Q)for header in $(filter-out crt.h std.h,$(all_files)); do \
127		$(CC) $(CFLAGS) $(CLANG_CROSS_FLAGS) -Wall -Werror -nostdinc -fsyntax-only -x c /dev/null \
128			-I$(or $(objtree),$(srctree))/usr/include -include $$header -include $$header || exit 1; \
129	done
130
131clean:
132	$(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"
133