node binding.gyp 配置文件粗解

我感觉谷歌的官方文档本身就不完善，导致我没办法详解，很多配置都是看别人写的慢慢摸索出来的。windows篇章里，我实现了一个海康node插件，linux版里，我同样实现了这个功能.

{"variables": {"module_path%": ""},"targets": [{"target_name": "hik_camera","cflags!": ["-fno-exceptions"],"cflags_cc!": ["-fno-exceptions"],"sources": ["src/index.cpp","src/KSHikCameraWrapper.cpp","src/common.cpp",],"include_dirs": ["<!@(node -p \"require('node-addon-api').include\")"],"defines": ["NAPI_DISABLE_CPP_EXCEPTIONS", "NAPI_VERSION=6"],"conditions": [['OS == "win"',{"msvs_configuration_attributes": {"CharacterSet": "0"},"msvs_settings": {"VCCLCompilerTool": {"DebugInformationFormat": 3}},"include_dirs": ["sdk/win/include"],"libraries": ["../sdk/win/lib/HCNetSDK.lib"],"conditions": [['module_path == ""',{"copies": [{"destination": "<(module_root_dir)/prebuilds/win32-x64","files": ["<(module_root_dir)/sdk/win/bin/AudioRender.dll","<(module_root_dir)/sdk/win/bin/GdiPlus.dll","<(module_root_dir)/sdk/win/bin/HCCore.dll","<(module_root_dir)/sdk/win/bin/HCNetSDK.dll","<(module_root_dir)/sdk/win/bin/hlog.dll","<(module_root_dir)/sdk/win/bin/HmMerge.dll","<(module_root_dir)/sdk/win/bin/hpr.dll","<(module_root_dir)/sdk/win/bin/HXVA.dll","<(module_root_dir)/sdk/win/bin/libeay32.dll","<(module_root_dir)/sdk/win/bin/libmmd.dll","<(module_root_dir)/sdk/win/bin/MP_Render.dll","<(module_root_dir)/sdk/win/bin/NPQos.dll","<(module_root_dir)/sdk/win/bin/PlayCtrl.dll","<(module_root_dir)/sdk/win/bin/ssleay32.dll","<(module_root_dir)/sdk/win/bin/SuperRender.dll","<(module_root_dir)/sdk/win/bin/YUVProcess.dll","<(module_root_dir)/sdk/win/bin/zlib1.dll","<(module_root_dir)/sdk/win/bin/HCNetSDKCom/",],}]},'module_path != ""',{"copies": [{"destination": "<(module_root_dir)/<(module_path)","files": ["<(module_root_dir)/sdk/win/bin/AudioRender.dll","<(module_root_dir)/sdk/win/bin/GdiPlus.dll","<(module_root_dir)/sdk/win/bin/HCCore.dll","<(module_root_dir)/sdk/win/bin/HCNetSDK.dll","<(module_root_dir)/sdk/win/bin/hlog.dll","<(module_root_dir)/sdk/win/bin/HmMerge.dll","<(module_root_dir)/sdk/win/bin/hpr.dll","<(module_root_dir)/sdk/win/bin/HXVA.dll","<(module_root_dir)/sdk/win/bin/libeay32.dll","<(module_root_dir)/sdk/win/bin/libmmd.dll","<(module_root_dir)/sdk/win/bin/MP_Render.dll","<(module_root_dir)/sdk/win/bin/NPQos.dll","<(module_root_dir)/sdk/win/bin/PlayCtrl.dll","<(module_root_dir)/sdk/win/bin/ssleay32.dll","<(module_root_dir)/sdk/win/bin/SuperRender.dll","<(module_root_dir)/sdk/win/bin/YUVProcess.dll","<(module_root_dir)/sdk/win/bin/zlib1.dll","<(module_root_dir)/sdk/win/bin/HCNetSDKCom/",],}]},]],},'OS == "linux"',{"include_dirs": ["sdk/linux/include"],"libraries": ["-L<(module_root_dir)/sdk/linux/bin","-lhcnetsdk",],"link_settings": {"libraries": ["-Wl,-rpath,'$$ORIGIN'"],},# "cflags": ["-finput-charset='gbk'"],"cflags": ["-finput-charset='gbk'", "-fexec-charset='gbk'"],# "cflags_cc": ["-fwide-exec-charset='gbk'"],"conditions": [['module_path == ""',{"copies": [{"destination": "<(module_root_dir)/prebuilds/linux-x64","files": ["<(module_root_dir)/sdk/linux/bin/HCNetSDK_Log_Switch.xml","<(module_root_dir)/sdk/linux/bin/libAudioRender.so","<(module_root_dir)/sdk/linux/bin/libcrypto.so","<(module_root_dir)/sdk/linux/bin/libcrypto.so.1.0.0","<(module_root_dir)/sdk/linux/bin/libHCCore.so","<(module_root_dir)/sdk/linux/bin/libhcnetsdk.so","<(module_root_dir)/sdk/linux/bin/libhpr.so","<(module_root_dir)/sdk/linux/bin/libNPQos.so","<(module_root_dir)/sdk/linux/bin/libopenal.so.1","<(module_root_dir)/sdk/linux/bin/libPlayCtrl.so","<(module_root_dir)/sdk/linux/bin/libssl.so","<(module_root_dir)/sdk/linux/bin/libSuperRender.so","<(module_root_dir)/sdk/linux/bin/libz.so","<(module_root_dir)/sdk/linux/bin/HCNetSDKCom/",],}]},'module_path != ""',{"copies": [{"destination": "<(PRODUCT_DIR)","files": ["<(module_root_dir)/sdk/linux/bin/HCNetSDK_Log_Switch.xml","<(module_root_dir)/sdk/linux/bin/libAudioRender.so","<(module_root_dir)/sdk/linux/bin/libcrypto.so","<(module_root_dir)/sdk/linux/bin/libcrypto.so.1.0.0","<(module_root_dir)/sdk/linux/bin/libHCCore.so","<(module_root_dir)/sdk/linux/bin/libhcnetsdk.so","<(module_root_dir)/sdk/linux/bin/libhpr.so","<(module_root_dir)/sdk/linux/bin/libNPQos.so","<(module_root_dir)/sdk/linux/bin/libopenal.so.1","<(module_root_dir)/sdk/linux/bin/libPlayCtrl.so","<(module_root_dir)/sdk/linux/bin/libssl.so","<(module_root_dir)/sdk/linux/bin/libSuperRender.so","<(module_root_dir)/sdk/linux/bin/libz.so","<(module_root_dir)/sdk/linux/bin/HCNetSDKCom/",],}]},]],},]],}],
}

部分指令的解释：

一，条件

可以根据 conditions 实现条件编译，比如在 windows 平台下，或者 Linux 平台下引用不同的库。

二，编译器链接器指令

windows 下，我使用的微软的cl（c/c++）编译器，所以可以传入编译和链接指令。上图所示就是如何配置字符集。

那么gyp支持哪些配置呢？在查看了gyp的源码之后，我发现，只支持这么几种：

那么这些指令对应的文档在哪里呢？大家可以看这里：配置选项

细节方面，大家自己看MSDN吧，然后自己尝试配置看看。

再就是linux一些配置：

关于linux的一些配置，如果涉及到引用第三方库，则需要处理好库文件路径。对于这个问题，大家可以移步看看我的这篇文章。

以上，就是gyp配置文件的一些粗解，其实其最终目的，就是配置一些参数，传给编译器链接器使用的。

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