问题
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.
The two defines are:
-D'_LIB_EXCEPTION_ABI=__attribute__((visibility("default")))'-D'_LIB_FALLTHROUGH()=((void)0)'
Unfortunately, the first one gets translated to (in the command build line):
-D'_LIB_EXCEPTION_ABI="\__attribute__((visibility(\"default\")))'"
While the second one is missing altogether from the command line.
回答1:
CMake has known limitations on what compile definitions could be.
Among these limitations are function-style definitions (_LIB_FALLTHROUGH()) and ones containing double quotes (").
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)
This header file could be included with -include compiler option (gcc) or /FI option (Visual Studio).
来源：https://stackoverflow.com/questions/61632105/define-gets-ignored-by-target-compile-definitions