xref: /linux/tools/include/nolibc/Makefile (revision 010d03d0e8fb0a2690d5a79c6580d8c4f32c937e) 
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 ?= $(CURDIR)/
19
20ifeq ($(V),1)
21Q=
22else
23Q=@
24endif
25
26arch_files := arch.h $(wildcard arch-*.h)
27all_files := \
28		compiler.h \
29		crt.h \
30		ctype.h \
31		dirent.h \
32		elf.h \
33		err.h \
34		errno.h \
35		fcntl.h \
36		getopt.h \
37		inttypes.h \
38		limits.h \
39		math.h \
40		nolibc.h \
41		poll.h \
42		sched.h \
43		signal.h \
44		stackprotector.h \
45		std.h \
46		stdarg.h \
47		stdbool.h \
48		stddef.h \
49		stdint.h \
50		stdlib.h \
51		string.h \
52		sys.h \
53		sys/auxv.h \
54		sys/ioctl.h \
55		sys/mman.h \
56		sys/mount.h \
57		sys/prctl.h \
58		sys/ptrace.h \
59		sys/random.h \
60		sys/reboot.h \
61		sys/resource.h \
62		sys/select.h \
63		sys/stat.h \
64		sys/syscall.h \
65		sys/sysmacros.h \
66		sys/time.h \
67		sys/timerfd.h \
68		sys/types.h \
69		sys/uio.h \
70		sys/utsname.h \
71		sys/wait.h \
72		time.h \
73		types.h \
74		unistd.h \
75		stdio.h \
76
77
78# install all headers needed to support a bare-metal compiler
79all: headers
80
81install: help
82
83help:
84	@echo "Supported targets under nolibc:"
85	@echo "  all                 call \"headers\""
86	@echo "  clean               clean the sysroot"
87	@echo "  headers             prepare a multi-arch sysroot in \$${OUTPUT}sysroot"
88	@echo "  headers_standalone  like \"headers\", and also install kernel headers"
89	@echo "  help                this help"
90	@echo ""
91	@echo "These targets may also be called from tools as \"make nolibc_<target>\"."
92	@echo ""
93	@echo "Currently using the following variables:"
94	@echo "  ARCH    = $(ARCH)"
95	@echo "  OUTPUT  = $(OUTPUT)"
96	@echo ""
97
98# installs headers for all archs at once.
99headers:
100	$(Q)mkdir -p "$(OUTPUT)sysroot/include"
101	$(Q)cp --parents $(arch_files) $(all_files) "$(OUTPUT)sysroot/include/"
102
103headers_standalone: headers
104	$(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
105
106CFLAGS_s390 := -m64
107CFLAGS := $(CFLAGS_$(ARCH))
108
109headers_check: headers_standalone
110	$(Q)for header in $(filter-out crt.h std.h,$(all_files)); do \
111		$(CC) $(CFLAGS) $(CLANG_CROSS_FLAGS) -Wall -Werror -nostdinc -fsyntax-only -x c /dev/null \
112			-I$(or $(objtree),$(srctree))/usr/include -include $$header -include $$header || exit 1; \
113	done
114
115clean:
116	$(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"
117