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