c - 如何在 Visual Studio 代码中将 libssh2 包含到 c 项目

Question

我正在尝试运行一个使用 libssh2 库的简单 C 程序。对于安装(构建+安装)，我使用了 cmake-gui(我使用的是 Windows 10 x64)，openSSL 选项处于打开状态，zlib 处于关闭状态。

我正在尝试不同的解决方案来包含具有正确依赖项的库，但每次都会显示不同的错误消息。像:

当我仅包含 ssh2 库路径时 -I "C:\\Program Files (x86)\\libssh2\\include"-L "C:\\Program Files (x86)\\libssh2\\lib"-lssh2

错误信息:

C:\Program Files (x86)\libssh2\lib/libssh2.a(openssl.c.obj):openssl.c:(.text+0x38): undefined reference to 'BN_bn2bin'

C:\Program Files (x86)\libssh2\lib/libssh2.a(openssl.c.obj):openssl.c:(.rdata$.refptr.PEM_read_bio_ECPrivateKey[.refptr.PEM_read_bio_ECPrivateKey]+0x0): undefined reference to 'PEM_read_bio_ECPrivateKey'

C:\Program Files (x86)\libssh2\lib/libssh2.a(pem.c.obj):pem.c:(.text+0x6dd): undefined reference to 'EVP_DigestUpdate'

C:\Program Files (x86)\libssh2\lib/libssh2.a(bcrypt_pbkdf.c.obj):bcrypt_pbkdf.c:(.text+0x3bb): undefined reference to 'EVP_DigestUpdate'

C:\Program Files (x86)\libssh2\lib/libssh2.a(crypt.c.obj):crypt.c:(.text+0x156): undefined reference to 'EVP_CIPHER_CTX_free'

我没有发布所有错误消息，但我注意到“()”中的那些库像 crypt 和 openssl 一样困惑。所以我尝试通过将 openSSL 安装目录的路径添加到编译器参数中来包含它们: -I 'C:\Program Files (x86)\libssh2\include' -I C:\OpenSSL-Win64\include -L 'C:\Program Files (x86)\libssh2\lib' -L C:\OpenSSL-Win64\lib -lssh2 -lws2_32 -lcrypto -lssl但它不起作用，因为他找不到这些库:

cannot find -lcrypto

cannot find -lssl the openSSL installation folder has the include folder with theesheaders files and the lib folder with .lib files (and i'm not sure 100% if the mingw64 can use those extension or it should be .a).

也许这个问题之前被问过，但经过几天的搜索，我找不到适合我的解决方案。对于重复的帖子深表歉意。

这是我的任务文件:

{
"version": "2.0.0",
"tasks": [
    {
        "type": "shell",
        "label": "Build active file",
        "command": "C:\\Program Files\\mingw-w64\\x86_64-6.2.0-win32-seh-rt_v5-rev1\\mingw64\\bin\\gcc.exe",
        "args": [
            "-Wall",
            "-Wextra",
            "-g",
            "${file}",
            "-I",
            "C:\\Program Files (x86)\\libssh2\\include",
            "-I",
            "C:\\OpenSSL-Win64\\include",
            "-L", 
            "C:\\Program Files (x86)\\libssh2\\lib",
            "-L",
            "C:\\OpenSSL-Win64\\lib",
            "-lssh2",
            "-lws2_32",
            "-lcrypto",
            "-lssl",
            "-o",
            "${fileDirname}\\${fileBasenameNoExtension}.exe"
        ],
        "options": {
            "cwd": "C:\\Program Files\\mingw-w64\\x86_64-6.2.0-win32-seh-rt_v5-rev1\\mingw64\\bin"
        },
        "problemMatcher": [
            "$gcc"
        ],
        "group": {
            "kind": "build",
            "isDefault": true
        }
    },
    {
        "type": "shell",
        "label": "Run active file",
        "command":".\\${fileBasenameNoExtension}.exe"
    }
]

}

我不确定您是否需要 c_cpp_properites 文件:

{
"configurations": [
    {
        "name": "Win32",
        "includePath": [
            "${workspaceFolder}/**"
        ],
        "defines": [
            "_DEBUG",
            "UNICODE",
            "_UNICODE"
        ],
        "windowsSdkVersion": "10.0.10586.0",
        "compilerPath": "\"C:/Program Files/mingw-w64/x86_64-6.2.0-win32-seh-rt_v5-rev1/mingw64/bin/gcc.exe\"",
        "cStandard": "c11",
        "cppStandard": "c++17",
        "intelliSenseMode": "gcc-x86"
    }
],
"version": 4

}

Answer 1

您始终需要链接应用程序或共享库的依赖项(您使用 -lssh2 完成)，但如果您正在进行静态构建，则还需要包含以下依赖项依赖关系。

在 Linux 上或在 Windows 上使用 MSYS2 时，您可以使用 pkg-config.exe 获取实际的链接参数，如下所示:

pkg-config.exe --static --libs libssh2

在我的例子中返回:

-LD:/Prog/winlibs64-9.2.0-7.0.0/custombuilt/lib -lssh2 -lws2_32 -lssl -lcrypto -lws2_32 -lgdi32 -lcrypt32 -lz