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-rw-r--r--tools/include/nolibc/Makefile75
1 files changed, 75 insertions, 0 deletions
diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile
new file mode 100644
index 000000000..cfd06764b
--- /dev/null
+++ b/tools/include/nolibc/Makefile
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for nolibc installation and tests
+include ../../scripts/Makefile.include
+
+# we're in ".../tools/include/nolibc"
+ifeq ($(srctree),)
+srctree := $(patsubst %/tools/include/,%,$(dir $(CURDIR)))
+endif
+
+# when run as make -C tools/ nolibc_<foo> the arch is not set
+ifeq ($(ARCH),)
+include $(srctree)/scripts/subarch.include
+ARCH = $(SUBARCH)
+endif
+
+# OUTPUT is only set when run from the main makefile, otherwise
+# it defaults to this nolibc directory.
+OUTPUT ?= $(CURDIR)/
+
+ifeq ($(V),1)
+Q=
+else
+Q=@
+endif
+
+nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
+arch_file := arch-$(nolibc_arch).h
+all_files := ctype.h errno.h nolibc.h signal.h std.h stdio.h stdlib.h string.h \
+ sys.h time.h types.h unistd.h
+
+# install all headers needed to support a bare-metal compiler
+all: headers
+
+install: help
+
+help:
+ @echo "Supported targets under nolibc:"
+ @echo " all call \"headers\""
+ @echo " clean clean the sysroot"
+ @echo " headers prepare a sysroot in tools/include/nolibc/sysroot"
+ @echo " headers_standalone like \"headers\", and also install kernel headers"
+ @echo " help this help"
+ @echo ""
+ @echo "These targets may also be called from tools as \"make nolibc_<target>\"."
+ @echo ""
+ @echo "Currently using the following variables:"
+ @echo " ARCH = $(ARCH)"
+ @echo " OUTPUT = $(OUTPUT)"
+ @echo ""
+
+# Note: when ARCH is "x86" we concatenate both x86_64 and i386
+headers:
+ $(Q)mkdir -p $(OUTPUT)sysroot
+ $(Q)mkdir -p $(OUTPUT)sysroot/include
+ $(Q)cp $(all_files) $(OUTPUT)sysroot/include/
+ $(Q)if [ "$(ARCH)" = "x86" ]; then \
+ sed -e \
+ 's,^#ifndef _NOLIBC_ARCH_X86_64_H,#if !defined(_NOLIBC_ARCH_X86_64_H) \&\& defined(__x86_64__),' \
+ arch-x86_64.h; \
+ sed -e \
+ 's,^#ifndef _NOLIBC_ARCH_I386_H,#if !defined(_NOLIBC_ARCH_I386_H) \&\& !defined(__x86_64__),' \
+ arch-i386.h; \
+ elif [ -e "$(arch_file)" ]; then \
+ cat $(arch_file); \
+ else \
+ echo "Fatal: architecture $(ARCH) not yet supported by nolibc." >&2; \
+ exit 1; \
+ fi > $(OUTPUT)sysroot/include/arch.h
+
+headers_standalone: headers
+ $(Q)$(MAKE) -C $(srctree) headers
+ $(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
+
+clean:
+ $(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"