Support GenerateExportHeader

[star-hengxing]

Is your feature request related to a problem? Please describe.

https://cmake.org/cmake/help/latest/module/GenerateExportHeader.html

Describe the solution you'd like

N/A

Describe alternatives you've considered

No response

Additional context

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[waruqi]

试了下，就为了生成这个？这玩意自己按需定义下，也没几行代码 = =

$ cat include/my_lib_export.h

#ifndef MY_LIB_EXPORT_H
#define MY_LIB_EXPORT_H

#ifdef MY_LIB_STATIC_DEFINE
#  define MY_LIB_EXPORT
#  define MY_LIB_NO_EXPORT
#else
#  ifndef MY_LIB_EXPORT
#    ifdef my_lib_EXPORTS
        /* We are building this library */
#      define MY_LIB_EXPORT __attribute__((visibility("default")))
#    else
        /* We are using this library */
#      define MY_LIB_EXPORT __attribute__((visibility("default")))
#    endif
#  endif

#  ifndef MY_LIB_NO_EXPORT
#    define MY_LIB_NO_EXPORT __attribute__((visibility("hidden")))
#  endif
#endif

#ifndef MY_LIB_DEPRECATED
#  define MY_LIB_DEPRECATED __attribute__ ((__deprecated__))
#endif

#ifndef MY_LIB_DEPRECATED_EXPORT
#  define MY_LIB_DEPRECATED_EXPORT MY_LIB_EXPORT MY_LIB_DEPRECATED
#endif

#ifndef MY_LIB_DEPRECATED_NO_EXPORT
#  define MY_LIB_DEPRECATED_NO_EXPORT MY_LIB_NO_EXPORT MY_LIB_DEPRECATED
#endif

#if 0 /* DEFINE_NO_DEPRECATED */
#  ifndef MY_LIB_NO_DEPRECATED
#    define MY_LIB_NO_DEPRECATED
#  endif
#endif

#endif /* MY_LIB_EXPORT_H */