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The C and C++ Include Header Files

/usr/include/python3.12/exports.h


$ cat -n /usr/include/python3.12/exports.h

     1	#ifndef Py_EXPORTS_H
     2	#define Py_EXPORTS_H
     3	
     4	#if defined(_WIN32) || defined(__CYGWIN__)
     5	    #if defined(Py_ENABLE_SHARED)
     6	        #define Py_IMPORTED_SYMBOL __declspec(dllimport)
     7	        #define Py_EXPORTED_SYMBOL __declspec(dllexport)
     8	        #define Py_LOCAL_SYMBOL
     9	    #else
    10	        #define Py_IMPORTED_SYMBOL
    11	        #define Py_EXPORTED_SYMBOL
    12	        #define Py_LOCAL_SYMBOL
    13	    #endif
    14	#else
    15	/*
    16	 * If we only ever used gcc >= 5, we could use __has_attribute(visibility)
    17	 * as a cross-platform way to determine if visibility is supported. However,
    18	 * we may still need to support gcc >= 4, as some Ubuntu LTS and Centos versions
    19	 * have 4 < gcc < 5.
    20	 */
    21	    #ifndef __has_attribute
    22	      #define __has_attribute(x) 0  // Compatibility with non-clang compilers.
    23	    #endif
    24	    #if (defined(__GNUC__) && (__GNUC__ >= 4)) ||\
    25	        (defined(__clang__) && __has_attribute(visibility))
    26	        #define Py_IMPORTED_SYMBOL __attribute__ ((visibility ("default")))
    27	        #define Py_EXPORTED_SYMBOL __attribute__ ((visibility ("default")))
    28	        #define Py_LOCAL_SYMBOL  __attribute__ ((visibility ("hidden")))
    29	    #else
    30	        #define Py_IMPORTED_SYMBOL
    31	        #define Py_EXPORTED_SYMBOL
    32	        #define Py_LOCAL_SYMBOL
    33	    #endif
    34	#endif
    35	
    36	#endif /* Py_EXPORTS_H */