不同厂家的编译器 对C语言的理解不一样

#  注意 是 C语言代码，不是C++
void func(void)
{
    const int buf_len = 64;
    char buffer[buf_len] = { 0 };
}

$$cat -n fun.c
     1  void func(void)
     2  {
     3      const int buf_len = 64;
     4      char buffer[buf_len] = { 0 };
     5  }
 
# gcc 编译报错 :(
 
$gcc -c fun.c
fun.c: In function ‘func’:
fun.c:4:5: error: variable-sized object may not be initialized
    4 |     char buffer[buf_len] = { 0 };
      |     ^~~~
# gcc 版本如下
$gcc --version
gcc (Debian 10.2.1-6) 10.2.1 20210110
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
 
# clang 11.x 编译完全没有错误:)
clang -c fun.c 
# clang 版本如下
$clang --version
Debian clang version 11.0.1-2
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
 
# 因为项目用的是GCC，所以放弃这个写法 :)