复盘2021-11-18，sigmaster

最新推荐文章于 2025-06-17 09:54:20 发布

原创最新推荐文章于 2025-06-17 09:54:20 发布 · 1.3k 阅读

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#uboot #内核 #ubuntu

本文介绍如何通过脚本快速搭建SigMaster环境，并解决了在编译过程中遇到的fatal error问题。文中详细说明了如何为uboot添加必要的gcc5.h文件以避免编译错误。

搭建sigmaster环境

**
可以不用文档的进行编译

在这里插入图片描述
1.可以直接用脚本
./build_boot.sh
kernel，project都用脚本

2.根据
read_before_build.txt

注意: 但是需要加上sudo权限

uboot遇到

fatal error: linux/compiler-gcc5.h: No such file or directory

解决：
boot/include/linux/加上compiler-gcc5.h文件

#ifndef __LINUX_COMPILER_H
#error "Please don't include <linux/compiler-gcc5.h> directly, include <linux/compiler.h> instead."
#endif

#define __used				__attribute__((__used__))
#define __must_check			__attribute__((warn_unused_result))
#define __compiler_offsetof(a, b)	__builtin_offsetof(a, b)

/* Mark functions as cold. gcc will assume any path leading to a call
   to them will be unlikely.  This means a lot of manual unlikely()s
   are unnecessary now for any paths leading to the usual suspects
   like BUG(), printk(), panic() etc. [but let's keep them for now for
   older compilers]

   Early snapshots of gcc 4.3 don't support this and we can't detect this
   in the preprocessor, but we can live with this because they're unreleased.
   Maketime probing would be overkill here.

   gcc also has a __attribute__((__hot__)) to move hot functions into
   a special section, but I don't see any sense in this right now in
   the kernel context */
#define __cold			__attribute__((__cold__))

#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)

#ifndef __CHECKER__
# define __compiletime_warning(message) __attribute__((warning(message)))
# define __compiletime_error(message) __attribute__((error(message)))
#endif /* __CHECKER__ */

/*
 * Mark a position in code as unreachable.  This can be used to
 * suppress control flow warnings after asm blocks that transfer
 * control elsewhere.
 *
 * Early snapshots of gcc 4.5 don't support this and we can't detect
 * this in the preprocessor, but we can live with this because they're
 * unreleased.  Really, we need to have autoconf for the kernel.
 */
#define unreachable() __builtin_unreachable()

/* Mark a function definition as prohibited from being cloned. */
#define __noclone	__attribute__((__noclone__))

/*
 * Tell the optimizer that something else uses this function or variable.
 */
#define __visible __attribute__((externally_visible))

/*
 * GCC 'asm goto' miscompiles certain code sequences:
 *
 *   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
 *
 * Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
 *
 * (asm goto is automatically volatile - the naming reflects this.)
 */
#define asm_volatile_goto(x...)	do { asm goto(x); asm (""); } while (0)

#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP
#define __HAVE_BUILTIN_BSWAP32__
#define __HAVE_BUILTIN_BSWAP64__
#define __HAVE_BUILTIN_BSWAP16__
#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */

#define KASAN_ABI_VERSION 4