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 := ctype.h errno.h nolibc.h signal.h std.h stdio.h stdlib.h string.h \
  29              sys.h time.h types.h unistd.h
  30
  31 # install all headers needed to support a bare-metal compiler
  32 all: headers
  33
  34 install: help
  35
  36 help:
  37         @echo "Supported targets under nolibc:"
  38         @echo "  all                 call \"headers\""
  39         @echo "  clean               clean the sysroot"
  40         @echo "  headers             prepare a sysroot in tools/include/nolibc/sysroot"
  41         @echo "  headers_standalone  like \"headers\", and also install kernel headers"
  42         @echo "  help                this help"
  43         @echo ""
  44         @echo "These targets may also be called from tools as \"make nolibc_<target>\"."
  45         @echo ""
  46         @echo "Currently using the following variables:"
  47         @echo "  ARCH    = $(ARCH)"
  48         @echo "  OUTPUT  = $(OUTPUT)"
  49         @echo ""
  50
  51 # Note: when ARCH is "x86" we concatenate both x86_64 and i386
  52 headers:
  53         $(Q)mkdir -p $(OUTPUT)sysroot
  54         $(Q)mkdir -p $(OUTPUT)sysroot/include
  55         $(Q)cp $(all_files) $(OUTPUT)sysroot/include/
  56         $(Q)if [ "$(ARCH)" = "x86" ]; then      \
  57                 sed -e                          \
  58                   's,^#ifndef _NOLIBC_ARCH_X86_64_H,#if !defined(_NOLIBC_ARCH_X86_64_H) \&\& defined(__x86_64__),' \
  59                   arch-x86_64.h;                \
  60                 sed -e                          \
  61                   's,^#ifndef _NOLIBC_ARCH_I386_H,#if !defined(_NOLIBC_ARCH_I386_H) \&\& !defined(__x86_64__),' \
  62                   arch-i386.h;                  \
  63         elif [ -e "$(arch_file)" ]; then        \
  64                 cat $(arch_file);               \
  65         else                                    \
  66                 echo "Fatal: architecture $(ARCH) not yet supported by nolibc." >&2; \
  67                 exit 1;                         \
  68         fi > $(OUTPUT)sysroot/include/arch.h
  69
  70 headers_standalone: headers
  71         $(Q)$(MAKE) -C $(srctree) headers
  72         $(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
  73
  74 clean:
  75         $(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"