c - 在 '=' 之前编译 C 代码 : error: expected ',' , ';'、 'asm'、 '__attribute__' 或 'int' 时遇到问题

Question

我正在使用 James M tutorials关于编写内核。我使用 GCC 6.2.0 和 Binutils 在 macOS 10.12 上使用交叉编译器为 elf-i386 arch 编写代码。

除 main.c 外，一切都可以编译，它因以下错误而失败:

Error: expected '=', ',', ';', 'asm' or '__attribute__' before 'int'.

但是，该文件与教程中的完全一样。谁能帮我弄清楚为什么？

/*
Sierra Kernel
kernel.c -- Main kernel file
Copyright (C) 2017  Jacobo Soffer <sofferjacob@gmail.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>. 
*/

#include <os.h>

int main(struct multiboot *mboot_ptr)
{
    kprint("Welcome to the Sierra Kernel! \n"); // Test VGA Driver
    kprint(BUILD_FULL); // Print version information
    asm volatile ("int $0x3");  // Test interrupts
    asm volatile ("int $0x4");
}

包含所有内核代码的公共(public)存储库位于:https://gitlab.com/SierraKernel/Core/tree/master

Answer 1

可能这是一个迟到的答案，但通常错误指向 int 之前包含的文件中的某些内容不正确，在您的情况下它是 os.h ，请尝试发现是否有任何内容此文件或其包含的任何文件中缺少 ;。