为什么我们不能使用预处理器来创建自定义分解字符串？

#define STR_START "
#define STR_END "

int puts(const char *);

int main() {
    puts(STR_START Hello world STR_END);
}

当我使用gcc编译它(注意：与clang类似的错误),它失败,与这些错误：

$gcc test.c
test.c:1:19: warning: missing terminaTing " character
test.c:2:17: warning: missing terminaTing " character
test.c: In function ‘main’:
test.c:7: error: missing terminaTing " character
test.c:7: error: ‘Hello’ undeclared (first use in this function)
test.c:7: error: (Each undeclared identifier is reported only once
test.c:7: error: for each function it appears in.)
test.c:7: error: expected ‘)’ before ‘world’
test.c:7: error: missing terminaTing " character

有什么困惑我,所以我通过预处理器运行：

$gcc -E test.c
# 1 "test.c"
# 1 ""
# 1 ""
# 1 "test.c"
test.c:1:19: warning: missing terminaTing " character
test.c:2:17: warning: missing terminaTing " character

int puts(const char *);

int main() {
    puts(" Hello world ");
}

尽管有警告,尽管生成完全有效的代码(以粗体显示)！

如果,C中的宏只是一个文本替换,为什么我的初始例子会失败？这是编译器的错误吗？如果没有,在标准中哪里有与这种情况有关的信息？

注意：我不是在寻找如何使我的初始代码段编译.我只是想了解为什么这种情况失败的信息.