lkml.org 
[lkml]   [2022]   [Mar]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 7/8] tools/nolibc: add a makefile to install headers
Date
This provides a target "headers_standalone" which installs the nolibc's
arch-specific headers with "arch.h" taken from the current arch (or a
concatenation of both i386 and x86_64 for arch=x86), then installs
kernel headers. This creates a convenient sysroot which is directly
usable by a bare-metal compiler to create any executable.

Signed-off-by: Willy Tarreau <w@1wt.eu>
---
tools/include/nolibc/Makefile | 43 +++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 tools/include/nolibc/Makefile

diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile
new file mode 100644
index 000000000000..7d4d61b08637
--- /dev/null
+++ b/tools/include/nolibc/Makefile
@@ -0,0 +1,43 @@
+# 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
+
+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:
+
+# 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"
+
--
2.35.1
\
 
 \ /
  Last update: 2022-03-21 18:35    [W:0.091 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site