MSVC编译时，遇到如下错误：
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2059: 语法错误:“常数” [D:\jenkins_home\workspace\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2143: 语法错误: 缺少“;”(在“)”的前面) [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2059: 语法错误:“)” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1897): error C2365: “abort”: 重定义；以前的定义是“函数” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\stdlib.h(56): note: 参见“abort”的声明
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1945): error C2059: 语法错误:“}” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
aaa.c
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2059: 语法错误:“常数” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2143: 语法错误: 缺少“;”(在“)”的前面) [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2059: 语法错误:“)” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1897): error C2365: “abort”: 重定义；以前的定义是“函数” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\stdlib.h(56): note: 参见“abort”的声明
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1945): error C2059: 语法错误:“}” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
bbb.c
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2059: 语法错误:“常数” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2143: 语法错误: 缺少“;”(在“)”的前面) [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1842): error C2059: 语法错误:“)” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1897): error C2365: “abort”: 重定义；以前的定义是“函数” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
C:\Program Files (x86)\Windows Kits\10\Include\10.0.18362.0\ucrt\stdlib.h(56): note: 参见“abort”的声明
c:\program files (x86)\windows kits\10\include\10.0.18362.0\um\msxml.h(1945): error C2059: 语法错误:“}” [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
D:\jenkins_home\workspace\xxx\xxx\xxx\xxx\xxx\model\xxx.c(291): warning C4090: “函数”: 不同的“const”限定符 [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
D:\jenkins_home\workspace\xxx\xxx\xxx\xxx\xxx\model\xxx.c(298): warning C4090: “函数”: 不同的“const”限定符 [D:\jenkins_home\workspace\xxx\xxx\xxx.vcxproj]
ccc.c
根据提示找到.c文件，发现代码也没有问题，也不是报的语法错误。
于是继续根据提示找到msxml.h文件的1842行，发现函数参数列表里有个pi，恰巧项目代码内有个宏定义是#define pi 3.14159
找到原因，是因宏定义与某些变量名冲突所致。
修改宏常量名称，再次编译，问题解决。
总结： 该类问题，一般都是由于重复定义或定义冲突等原因造成，尤其是在定义宏时尽可能避免简单字眼，防止与某些第三方库或代码发生冲突。