tools/include/nolibc/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 # Makefile for nolibc installation and tests
   3 include ../../scripts/Makefile.include
   4
   5 # we're in ".../tools/include/nolibc"
   6 ifeq ($(srctree),)
   7 srctree := $(patsubst %/tools/include/,%,$(dir $(CURDIR)))
   8 endif
   9
  10 # when run as make -C tools/ nolibc_<foo> the arch is not set
  11 ifeq ($(ARCH),)
  12 include $(srctree)/scripts/subarch.include
  13 ARCH = $(SUBARCH)
  14 endif
  15
  16 # OUTPUT is only set when run from the main makefile, otherwise
  17 # it defaults to this nolibc directory.
  18 OUTPUT ?= $(CURDIR)/
  19
  20 ifeq ($(V),1)
  21 Q=
  22 else
  23 Q=@
  24 endif
  25
  26 nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
  27 arch_file := arch-$(nolibc_arch).h
  28 all_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                 stdint.h \
  39                 stdlib.h \
  40                 string.h \
  41                 sys.h \
  42                 time.h \
  43                 types.h \
  44                 unistd.h \
  45                 stdio.h \
  46
  47
  48 # install all headers needed to support a bare-metal compiler
  49 all: headers
  50
  51 install: help
  52
  53 help:
  54         @echo "Supported targets under nolibc:"
  55         @echo "  all                 call \"headers\""
  56         @echo "  clean               clean the sysroot"
  57         @echo "  headers             prepare a sysroot in tools/include/nolibc/sysroot"
  58         @echo "  headers_standalone  like \"headers\", and also install kernel headers"
  59         @echo "  help                this help"
  60         @echo ""
  61         @echo "These targets may also be called from tools as \"make nolibc_<target>\"."
  62         @echo ""
  63         @echo "Currently using the following variables:"
  64         @echo "  ARCH    = $(ARCH)"
  65         @echo "  OUTPUT  = $(OUTPUT)"
  66         @echo ""
  67
  68 # Note: when ARCH is "x86" we concatenate both x86_64 and i386
  69 headers:
  70         $(Q)mkdir -p $(OUTPUT)sysroot
  71         $(Q)mkdir -p $(OUTPUT)sysroot/include
  72         $(Q)cp $(all_files) $(OUTPUT)sysroot/include/
  73         $(Q)if [ "$(ARCH)" = "x86" ]; then      \
  74                 sed -e                          \
  75                   's,^#ifndef _NOLIBC_ARCH_X86_64_H,#if !defined(_NOLIBC_ARCH_X86_64_H) \&\& defined(__x86_64__),' \
  76                   arch-x86_64.h;                \
  77                 sed -e                          \
  78                   's,^#ifndef _NOLIBC_ARCH_I386_H,#if !defined(_NOLIBC_ARCH_I386_H) \&\& !defined(__x86_64__),' \
  79                   arch-i386.h;                  \
  80         elif [ -e "$(arch_file)" ]; then        \
  81                 cat $(arch_file);               \
  82         else                                    \
  83                 echo "Fatal: architecture $(ARCH) not yet supported by nolibc." >&2; \
  84                 exit 1;                         \
  85         fi > $(OUTPUT)sysroot/include/arch.h
  86
  87 headers_standalone: headers
  88         $(Q)$(MAKE) -C $(srctree) headers
  89         $(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
  90
  91 clean:
  92         $(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"