Makefile

  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 $(wildcard arch-*.h)
 27all_files := \
 28		compiler.h \
 29		crt.h \
 30		ctype.h \
 31		dirent.h \
 32		elf.h \
 33		errno.h \
 34		fcntl.h \
 35		getopt.h \
 36		inttypes.h \
 37		limits.h \
 38		math.h \
 39		nolibc.h \
 40		poll.h \
 41		sched.h \
 42		signal.h \
 43		stackprotector.h \
 44		std.h \
 45		stdarg.h \
 46		stdbool.h \
 47		stddef.h \
 48		stdint.h \
 49		stdlib.h \
 50		string.h \
 51		sys.h \
 52		sys/auxv.h \
 53		sys/ioctl.h \
 54		sys/mman.h \
 55		sys/mount.h \
 56		sys/prctl.h \
 57		sys/random.h \
 58		sys/reboot.h \
 59		sys/resource.h \
 60		sys/select.h \
 61		sys/stat.h \
 62		sys/syscall.h \
 63		sys/sysmacros.h \
 64		sys/time.h \
 65		sys/timerfd.h \
 66		sys/types.h \
 67		sys/uio.h \
 68		sys/utsname.h \
 69		sys/wait.h \
 70		time.h \
 71		types.h \
 72		unistd.h \
 73		stdio.h \
 74
 75
 76# install all headers needed to support a bare-metal compiler
 77all: headers
 78
 79install: help
 80
 81help:
 82	@echo "Supported targets under nolibc:"
 83	@echo "  all                 call \"headers\""
 84	@echo "  clean               clean the sysroot"
 85	@echo "  headers             prepare a multi-arch sysroot in \$${OUTPUT}sysroot"
 86	@echo "  headers_standalone  like \"headers\", and also install kernel headers"
 87	@echo "  help                this help"
 88	@echo ""
 89	@echo "These targets may also be called from tools as \"make nolibc_<target>\"."
 90	@echo ""
 91	@echo "Currently using the following variables:"
 92	@echo "  ARCH    = $(ARCH)"
 93	@echo "  OUTPUT  = $(OUTPUT)"
 94	@echo ""
 95
 96# installs headers for all archs at once.
 97headers:
 98	$(Q)mkdir -p "$(OUTPUT)sysroot"
 99	$(Q)mkdir -p "$(OUTPUT)sysroot/include"
100	$(Q)cp --parents $(arch_files) $(all_files) "$(OUTPUT)sysroot/include/"
101
102headers_standalone: headers
103	$(Q)$(MAKE) -C $(srctree) 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"