include/python3.12/exports.h

0001 #ifndef Py_EXPORTS_H
0002 #define Py_EXPORTS_H
0003
0004 #if defined(_WIN32) || defined(__CYGWIN__)
0005     #if defined(Py_ENABLE_SHARED)
0006         #define Py_IMPORTED_SYMBOL __declspec(dllimport)
0007         #define Py_EXPORTED_SYMBOL __declspec(dllexport)
0008         #define Py_LOCAL_SYMBOL
0009     #else
0010         #define Py_IMPORTED_SYMBOL
0011         #define Py_EXPORTED_SYMBOL
0012         #define Py_LOCAL_SYMBOL
0013     #endif
0014 #else
0015 /*
0016  * If we only ever used gcc >= 5, we could use __has_attribute(visibility)
0017  * as a cross-platform way to determine if visibility is supported. However,
0018  * we may still need to support gcc >= 4, as some Ubuntu LTS and Centos versions
0019  * have 4 < gcc < 5.
0020  */
0021     #ifndef __has_attribute
0022       #define __has_attribute(x) 0  // Compatibility with non-clang compilers.
0023     #endif
0024     #if (defined(__GNUC__) && (__GNUC__ >= 4)) ||\
0025         (defined(__clang__) && __has_attribute(visibility))
0026         #define Py_IMPORTED_SYMBOL __attribute__ ((visibility ("default")))
0027         #define Py_EXPORTED_SYMBOL __attribute__ ((visibility ("default")))
0028         #define Py_LOCAL_SYMBOL  __attribute__ ((visibility ("hidden")))
0029     #else
0030         #define Py_IMPORTED_SYMBOL
0031         #define Py_EXPORTED_SYMBOL
0032         #define Py_LOCAL_SYMBOL
0033     #endif
0034 #endif
0035
0036 #endif /* Py_EXPORTS_H */