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818924d129
The stackprotector support in nolibc should be enabled iff it is also enabled in the compiler. Use the preprocessor defines added by gcc and clang if stackprotector support is enable to automatically do so in nolibc. This completely removes the need for any user-visible API. To avoid inlining the lengthy preprocessor check into every user introduce a new header compiler.h that abstracts the logic away. As the define NOLIBC_STACKPROTECTOR is now not user-relevant anymore prefix it with an underscore. Suggested-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/lkml/20230520133237.GA27501@1wt.eu/ Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
91 lines
2.5 KiB
Makefile
91 lines
2.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# Makefile for nolibc installation and tests
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include ../../scripts/Makefile.include
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# we're in ".../tools/include/nolibc"
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ifeq ($(srctree),)
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srctree := $(patsubst %/tools/include/,%,$(dir $(CURDIR)))
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endif
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# when run as make -C tools/ nolibc_<foo> the arch is not set
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ifeq ($(ARCH),)
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include $(srctree)/scripts/subarch.include
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ARCH = $(SUBARCH)
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endif
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# OUTPUT is only set when run from the main makefile, otherwise
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# it defaults to this nolibc directory.
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OUTPUT ?= $(CURDIR)/
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ifeq ($(V),1)
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Q=
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else
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Q=@
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endif
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nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
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arch_file := arch-$(nolibc_arch).h
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all_files := \
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compiler.h \
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ctype.h \
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errno.h \
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nolibc.h \
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signal.h \
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stackprotector.h \
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std.h \
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stdint.h \
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stdlib.h \
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string.h \
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sys.h \
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time.h \
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types.h \
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unistd.h \
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stdio.h \
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# install all headers needed to support a bare-metal compiler
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all: headers
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install: help
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help:
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@echo "Supported targets under nolibc:"
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@echo " all call \"headers\""
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@echo " clean clean the sysroot"
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@echo " headers prepare a sysroot in tools/include/nolibc/sysroot"
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@echo " headers_standalone like \"headers\", and also install kernel headers"
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@echo " help this help"
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@echo ""
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@echo "These targets may also be called from tools as \"make nolibc_<target>\"."
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@echo ""
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@echo "Currently using the following variables:"
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@echo " ARCH = $(ARCH)"
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@echo " OUTPUT = $(OUTPUT)"
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@echo ""
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# Note: when ARCH is "x86" we concatenate both x86_64 and i386
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headers:
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$(Q)mkdir -p $(OUTPUT)sysroot
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$(Q)mkdir -p $(OUTPUT)sysroot/include
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$(Q)cp $(all_files) $(OUTPUT)sysroot/include/
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$(Q)if [ "$(ARCH)" = "x86" ]; then \
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sed -e \
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's,^#ifndef _NOLIBC_ARCH_X86_64_H,#if !defined(_NOLIBC_ARCH_X86_64_H) \&\& defined(__x86_64__),' \
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arch-x86_64.h; \
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sed -e \
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's,^#ifndef _NOLIBC_ARCH_I386_H,#if !defined(_NOLIBC_ARCH_I386_H) \&\& !defined(__x86_64__),' \
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arch-i386.h; \
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elif [ -e "$(arch_file)" ]; then \
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cat $(arch_file); \
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else \
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echo "Fatal: architecture $(ARCH) not yet supported by nolibc." >&2; \
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exit 1; \
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fi > $(OUTPUT)sysroot/include/arch.h
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headers_standalone: headers
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$(Q)$(MAKE) -C $(srctree) headers
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$(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
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clean:
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$(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"
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