基于变量的条件补全到makefile中 [英] conditional compliation based on variable into makefile

问题描述

根据不同的编译方式，我想在我的C/C ++代码中包含或不包含文件.

Inside my C/C++ code I would like to include or not a file depending on different compilation.

此刻我使用这个:

#ifndef __x86_64__
    #include <myLib.h>
#endif

这使我可以确定平台是否为32/64位，但没有给我足够的自由度.

this gives me the possibility of doing whether the platform is 32/64 bit but does not give me enough freedom.

我想像

make includeMyLib=1

并依赖于此，例如:

#ifndef includeMyLib
    #include <myLib.h>
#endif

您知道这样的事情是否可能吗?

Do you know if anything like this is possible?

推荐答案

如果使用GNU make，在Makefile中可能会有类似的内容:

If you use GNU make, you could have something like this in the Makefile:

ifdef includeMyLib
CFLAGS += -DincludeMyLib
endif

这将更改编译器用于添加#define includeMyLib的标志.

This will change the flags used by the compiler to add the #define includeMyLib.

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