定义被target_compile_definitions忽略 [英] define gets ignored by target_compile_definitions

问题描述

我正在寻找一个库，我需要向该构建传递两个定义，但是cmake的 target_compile_definitions()对它们进行了打乱，使其无法使用.

I am looking to build a library and I need to pass two defines to that build, but cmake's target_compile_definitions() scrambles them in a manner that renders them unusable.

两个定义是:

• -D'_LIB_EXCEPTION_ABI = __ attribute __((visibility("default")))'
• -D'_LIB_FALLTHROUGH()=((void)0)'

不幸的是，第一个被翻译为(在命令构建行中):

Unfortunately, the first one gets translated to (in the command build line):

• -D'_LIB_EXCEPTION_ABI ="\ __ attribute __((visibility(\" default \)))'"

第二个命令行完全丢失了.

While the second one is missing altogether from the command line.

推荐答案

CMake具有关于可能的编译定义的已知限制.

在这些限制中，有函数样式定义( _LIB_FALLTHROUGH())和包含双引号的定义(").

Among these limitations are function-style definitions (_LIB_FALLTHROUGH()) and ones containing double quotes (").

建议不要使用这些编译定义来创建单独的头文件，而不是尝试克服这些限制:

Instead of attempting to overcome these limitations, it is recommended to create a separate header file with these compile definitions:

#define _LIB_EXCEPTION_ABI __attribute__((visibility("default")))
#define _LIB_FALLTHROUGH() ((void)0)

此头文件可能包含在 -include 编译器选项(gcc)或/FI 选项(Visual Studio)中.

This header file could be included with -include compiler option (gcc) or /FI option (Visual Studio).

这篇关于定义被target_compile_definitions忽略的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！