Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
26nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
27arch_file := arch-$(nolibc_arch).h
28all_files := \
29 compiler.h \
30 crt.h \
31 ctype.h \
32 dirent.h \
33 errno.h \
34 limits.h \
35 nolibc.h \
36 signal.h \
37 stackprotector.h \
38 std.h \
39 stdarg.h \
40 stdbool.h \
41 stdint.h \
42 stdlib.h \
43 string.h \
44 sys.h \
45 time.h \
46 types.h \
47 unistd.h \
48 stdio.h \
49
50
51# install all headers needed to support a bare-metal compiler
52all: headers
53
54install: help
55
56help:
57 @echo "Supported targets under nolibc:"
58 @echo " all call \"headers\""
59 @echo " clean clean the sysroot"
60 @echo " headers prepare a sysroot in tools/include/nolibc/sysroot"
61 @echo " headers_standalone like \"headers\", and also install kernel headers"
62 @echo " help this help"
63 @echo ""
64 @echo "These targets may also be called from tools as \"make nolibc_<target>\"."
65 @echo ""
66 @echo "Currently using the following variables:"
67 @echo " ARCH = $(ARCH)"
68 @echo " OUTPUT = $(OUTPUT)"
69 @echo ""
70
71# Note: when ARCH is "x86" we concatenate both x86_64 and i386
72headers:
73 $(Q)mkdir -p $(OUTPUT)sysroot
74 $(Q)mkdir -p $(OUTPUT)sysroot/include
75 $(Q)cp $(all_files) $(OUTPUT)sysroot/include/
76 $(Q)if [ "$(ARCH)" = "x86" ]; then \
77 sed -e \
78 's,^#ifndef _NOLIBC_ARCH_X86_64_H,#if !defined(_NOLIBC_ARCH_X86_64_H) \&\& defined(__x86_64__),' \
79 arch-x86_64.h; \
80 sed -e \
81 's,^#ifndef _NOLIBC_ARCH_I386_H,#if !defined(_NOLIBC_ARCH_I386_H) \&\& !defined(__x86_64__),' \
82 arch-i386.h; \
83 elif [ -e "$(arch_file)" ]; then \
84 cat $(arch_file); \
85 else \
86 echo "Fatal: architecture $(ARCH) not yet supported by nolibc." >&2; \
87 exit 1; \
88 fi > $(OUTPUT)sysroot/include/arch.h
89
90headers_standalone: headers
91 $(Q)$(MAKE) -C $(srctree) headers
92 $(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
93
94clean:
95 $(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"