I'm working on a C grammar analysis program. While running C preprocessor, there are some libraries which check the environment and use #error to stop compiling. How can I disable them, since I only need the preprocess step to finish?
我正在研究C语法分析程序。在运行C预处理器时，有一些库检查环境并使用#error停止编译。如何禁用它们，因为我只需要预处理步骤即可完成？
2 个解决方案
#1
2
Why do you want to disable them? They are outputting an error and stopping compilation for a reason. The only way I know to disable them is to modify the source code and remove them.
你为什么要禁用它们？他们输出错误并因某种原因停止编译。我知道禁用它们的唯一方法是修改源代码并删除它们。
#2
0
If an #error preprocessor directive is being executed, that means preprocessing is done.
如果正在执行#error预处理程序指令，则表示已完成预处理。
If the directive is conditional (e.g. an error only emitted if some set of conditions are met, such as in a #ifdef SOME_MACRO - #endif block) then the way to avoid it is to ensure the relevant conditions aren't true.
如果指令是有条件的（例如，只有满足某些条件时才会发出错误，例如在#ifdef SOME_MACRO - #endif块中），那么避免它的方法是确保相关条件不成立。
In the (extremely rare) situation that the #error is unconditional, then presumably the intent is to stop preprocessing immediately. Rather than disabling it, the solution is to avoid it (e.g. not #include the file which does that) not to disable it.
在（非常罕见）#error是无条件的情况下，可能意图是立即停止预处理。而不是禁用它，解决方案是避免它（例如，不#include执行该操作的文件）不禁用它。
If you only want to run the preprocessor, then the presence of #error makes no difference. Most compilers either have the preprocessor as a separate program, or have an option (e.g. "gcc - E") that causes compilation to stop after the preprocessing phase.
如果你只想运行预处理器，那么#error的存在没有区别。大多数编译器要么将预处理器作为单独的程序，要么具有选项（例如“gcc -E”），这会导致编译在预处理阶段后停止。
#1
2
Why do you want to disable them? They are outputting an error and stopping compilation for a reason. The only way I know to disable them is to modify the source code and remove them.
你为什么要禁用它们？他们输出错误并因某种原因停止编译。我知道禁用它们的唯一方法是修改源代码并删除它们。
#2
0
If an #error preprocessor directive is being executed, that means preprocessing is done.
如果正在执行#error预处理程序指令，则表示已完成预处理。
If the directive is conditional (e.g. an error only emitted if some set of conditions are met, such as in a #ifdef SOME_MACRO - #endif block) then the way to avoid it is to ensure the relevant conditions aren't true.
如果指令是有条件的（例如，只有满足某些条件时才会发出错误，例如在#ifdef SOME_MACRO - #endif块中），那么避免它的方法是确保相关条件不成立。
In the (extremely rare) situation that the #error is unconditional, then presumably the intent is to stop preprocessing immediately. Rather than disabling it, the solution is to avoid it (e.g. not #include the file which does that) not to disable it.
在（非常罕见）#error是无条件的情况下，可能意图是立即停止预处理。而不是禁用它，解决方案是避免它（例如，不#include执行该操作的文件）不禁用它。
If you only want to run the preprocessor, then the presence of #error makes no difference. Most compilers either have the preprocessor as a separate program, or have an option (e.g. "gcc - E") that causes compilation to stop after the preprocessing phase.
如果你只想运行预处理器，那么#error的存在没有区别。大多数编译器要么将预处理器作为单独的程序，要么具有选项（例如“gcc -E”），这会导致编译在预处理阶段后停止。