From: Willy Tarreau <w@1wt.eu>
To: "Paul E . McKenney" <paulmck@kernel.org>
Cc: linux-kernel@vger.kernel.org, Ammar Faizi <ammarfaizi2@gnuweeb.org>
Subject: [PATCH 7/8] tools/nolibc: add a makefile to install headers
Date: Mon, 21 Mar 2022 18:33:13 +0100 [thread overview]
Message-ID: <20220321173314.7519-8-w@1wt.eu> (raw)
In-Reply-To: <20220321173314.7519-1-w@1wt.eu>
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
next prev parent reply other threads:[~2022-03-21 17:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-21 17:33 [PATCH 0/8] nolibc: small updates required for the self-tests Willy Tarreau
2022-03-21 17:33 ` [PATCH 1/8] tools/nolibc/stdio: make printf(%s) accept NULL Willy Tarreau
2022-03-21 17:33 ` [PATCH 2/8] tools/nolibc/stdlib: add a simple getenv() implementation Willy Tarreau
2022-03-21 17:33 ` [PATCH 3/8] tools/nolibc/stdio: add support for '%p' to vfprintf() Willy Tarreau
2022-03-21 17:33 ` [PATCH 4/8] tools/nolibc/string: add strcmp() and strncmp() Willy Tarreau
2022-03-21 17:33 ` [PATCH 5/8] tools/nolibc/sys: add syscall definition for getppid() Willy Tarreau
2022-03-21 17:33 ` [PATCH 6/8] tools/nolibc/types: add poll() and waitpid() flag definitions Willy Tarreau
2022-03-21 17:33 ` Willy Tarreau [this message]
2022-03-21 17:33 ` [PATCH 8/8] tools/nolibc: add the nolibc subdir to the common Makefile Willy Tarreau
2022-03-21 20:29 ` [PATCH 0/8] nolibc: small updates required for the self-tests Paul E. McKenney
2022-03-21 20:33 ` Willy Tarreau
2022-03-21 20:42 ` Paul E. McKenney
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