R无法识别命令行选项. (警告:未知选项"-d") [英] R doesn't recognize command line option. (WARNING: unknown option '-d')

问题描述

我正在尝试使用gdb以视频中指定的相同方式调试R包中的编译代码: https: //vimeo.com/11937905 和写作R扩展程序第4.4节.

I am trying to use gdb to debug compiled code in an R package in the same way as specified in the video: https://vimeo.com/11937905 and Writing R Extensions section 4.4.

这些消息来源说要使用命令 启动R时R -d gdb.但是，每当我尝试执行此操作时，都会收到一条消息，提示WARNING: unknown option '-d'，R在正常情况下启动. R为什么不识别-d标志?我正在使用Windows 10.

These sources say to use the command R -d gdb when starting R. However, whenever I try to do this I get a message saying WARNING: unknown option '-d' and R is started under normal conditions. Why isn't R recognizing the -d flag? I am using Windows 10.

推荐答案

@MatthewLueder终于发现自己在Windows上进行调试无法像在Linux上进行操作.

As @MatthewLueder has found out himself finally debugging on Windows does not work as on Linux.

R中缺少-d参数的主要原因似乎是 Windows无法向进程发送信号来中断执行并将控制权传递给(gdb)调试器:

The main reason for the missing -d argument in R seems to be that Windows cannot send a signal to a process to interrupt the execution and pass the control to the (gdb) debugger:

• 在不中断R的情况下，您无法设置断点.
• 如果不将R启动到R控制台中，则无法加载要调试的库(不弄脏手).

因此，Windows上的R提供了使用RGui而不是R的解决方法:

Therefore R on Windows offers a work-around using RGui instead of R:

gdb /path/to/R-3.x.x/bin/x64/Rgui.exe
(gdb) run

启动RGui后，您进入R外壳并可以加载软件包 包含要调试的DLL.

After starting the RGui you are in an R shell and can load your packages that contain the DLLs to be debugged.

要设置调试断点，您可以通过菜单项来中断R，使其闯入调试器，该菜单项仅在RGui以gdb启动时可见:

To set breakpoints for debugging you can interrupt R to break into the debugger via a menu item that is only visible if RGui was started with gdb:

现在，您可以通过b a_function_name在代码中设置断点，输入c继续执行R，在R中调用该函数并贴上代码:gdb显示断点命中和 您可以进行调试(逐步执行代码并打印变量值).

Now you can set breakpoints in your code via b a_function_name, enter c to continue R, call the function in R and voilà: gdb shows the breakpoint hit and you can debug (stepping through the code and printing variable values).

PS:由于要在gdb中查看R变量或Rcpp数据类型的当前值非常困难，所以我目前正在开发R包以改进R包中C ++代码的调试. "https://github.com/aryoda/R_CppDebugHelper" rel ="nofollow noreferrer"> https://github.com/aryoda/R_CppDebugHelper

PS: I am currently developing an R package to improve the debugging of C++ code in R packages since it is quite difficult to view the current values of R variables or Rcpp data types in gdb: https://github.com/aryoda/R_CppDebugHelper

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