如何让 Tesseract 在 Windows 上与 CGO 一起工作？

Question

我一直在尝试让otiai10/gosseract （Go package 用于 Tesseract C++ 库）在 Windows 上工作但没有成功。 作为一项要求， gosseract 需要安装“ tesseract-ocr ，包括库和头文件” 。

Tesseract Windows 编译文档提到了SW和Vcpkg的使用，据我了解，这依赖于 MSVC，因此与 Go 不兼容。

该文档还提到了 Cygwin 包的存在。 我尝试通过安装tesseract-ocr ( 5.2.0-1 )、 tesseract-ocr-devel ( 5.2.0-1 )、 tesseract-ocr-eng ( 5.00-1 ) 以及mingw64-x86_64-gcc-g++来利用它们mingw64-x86_64-gcc-g++和mingw64-x86_64-gcc-core之后我定义了以下环境变量：

CGO_CFLAGS=-IC:\cygwin64\usr\include
CGO_CPPFLAGS=-IC:\cygwin64\usr\include
CGO_LDFLAGS=-LC:\cygwin64\lib
PATH=C:\cygwin64\bin;...
CC=C:\cygwin64\bin\x86_64-w64-mingw32-gcc.exe
CXX=C:\cygwin64\bin\x86_64-w64-mingw32-g++.exe

但是，尝试编译（通过GoLand ）示例项目（ otiai10/ocrserver ）仍然会导致 linker 错误：

GOROOT=C:\Users\REDACTED\go\go1.18rc1 #gosetup
GOPATH=C:\Users\REDACTED\go #gosetup
C:\Users\REDACTED\go\go1.18rc1\bin\go.exe build -o C:\Users\REDACTED\AppData\Local\Temp\GoLand\___go_build_github_com_otiai10_ocrserver.exe github.com/otiai10/ocrserver #gosetup
# github.com/otiai10/gosseract/v2
/usr/lib/gcc/x86_64-w64-mingw32/11/../../../../x86_64-w64-mingw32/bin/ld: $WORK\b133\_x003.o: in function `tesseract::TessBaseAPI::Init(char const*, char const*)':
/cygdrive/c/Users/REDACTED/go/pkg/mod/github.com/otiai10/gosseract/v2@v2.3.1/C:/cygwin64/usr/include/tesseract/baseapi.h:215: undefined reference to `tesseract::TessBaseAPI::Init(char const*, char const*, tesseract::OcrEngineMode, char**, int, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const*, bool)'
/usr/lib/gcc/x86_64-w64-mingw32/11/../../../../x86_64-w64-mingw32/bin/ld: /cygdrive/c/Users/REDACTED/go/pkg/mod/github.com/otiai10/gosseract/v2@v2.3.1/C:/cygwin64/usr/include/tesseract/baseapi.h:215: undefined reference to `tesseract::TessBaseAPI::Init(char const*, char const*, tesseract::OcrEngineMode, char**, int, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const*, bool)'
/usr/lib/gcc/x86_64-w64-mingw32/11/../../../../x86_64-w64-mingw32/bin/ld: /cygdrive/c/Users/REDACTED/go/pkg/mod/github.com/otiai10/gosseract/v2@v2.3.1/C:/cygwin64/usr/include/tesseract/baseapi.h:215: undefined reference to `tesseract::TessBaseAPI::Init(char const*, char const*, tesseract::OcrEngineMode, char**, int, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const*, bool)'
collect2: error: ld returned 1 exit status

如何在 Windows 机器上正确设置“ tesseract-ocr ，包括库和头文件”以实现 CGO 兼容性？

---

> go version
go version go1.17 windows/amd64
> C:\cygwin64\bin\x86_64-w64-mingw32-gcc.exe --version
x86_64-w64-mingw32-gcc (GCC) 11.3.0
> C:\cygwin64\bin\x86_64-w64-mingw32-g++.exe --version
x86_64-w64-mingw32-g++ (GCC) 11.3.0
> C:\cygwin64\bin\x86_64-w64-mingw32-ld.exe --version
GNU ld (GNU Binutils) 2.38