用`VCPKG`安装`eigen3`时，出现以下错误：

Error: Failed to download from mirror set:
File does not have the expected hash:
             url : [ https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz ]
       File path : [ E:\vcpkg\downloads\libeigen-eigen-3.4.0.tar.gz.6808.part ]
   Expected hash : [ ba75ecb760e32acf4ceaf27115468e65d4f77c44f8d519b5a13e7940af2c03a304ad433368cb6d55431f307c5c39e2666ab41d34442db3cf441638e51f5c3b6a ]
     Actual hash : [ c16161558323c340bf48d18bb28e78f45a505ea0d9579ef746c78c5513b84af92db6435dd839573cc27c8558de83ad7c25b5d57e1b74677f3022c0dc4f6d3765 ]

手动去gitlab下载，去engen官网下载代码，用Hasher Lite计算SHA512就是c16161558323c340bf48d18bb28e78f45a505ea0d9579ef746c78c5513b84af92db6435dd839573cc27c8558de83ad7c25b5d57e1b74677f3022c0dc4f6d3765。

无奈，只好修改E:\vcpkg\ports\eigen3\portfile.cmake，匹配实际的SHA512。