gh-110079: Remove extern "C" { ...} in C code (#110080)

Python/dtoa.c

@@ -172,10 +172,6 @@ typedef uint64_t ULLong;
 #define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
 #endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 typedef union { double d; ULong L[2]; } U;
 
 #ifdef IEEE_8087
@@ -2813,8 +2809,5 @@ _Py_dg_dtoa(double dd, int mode, int ndigits,
         _Py_dg_freedtoa(s0);
     return NULL;
 }
-#ifdef __cplusplus
-}
-#endif
 
 #endif  // _PY_SHORT_FLOAT_REPR == 1

Python/errors.c

@@ -16,11 +16,6 @@
 #  include <stdlib.h>             // _sys_nerr
 #endif
 
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* Forward declarations */
 static PyObject *
 _PyErr_FormatV(PyThreadState *tstate, PyObject *exception,
@@ -1918,7 +1913,3 @@ PyErr_ProgramTextObject(PyObject *filename, int lineno)
 {
     return _PyErr_ProgramDecodedTextObject(filename, lineno, NULL);
 }
-
-#ifdef __cplusplus
-}
-#endif

Python/getargs.c

@@ -7,10 +7,6 @@
 #include "pycore_pylifecycle.h"   // _PyArg_Fini
 #include "pycore_tuple.h"         // _PyTuple_ITEMS()
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* Export Stable ABIs (abi only) */
 PyAPI_FUNC(int) _PyArg_Parse_SizeT(PyObject *, const char *, ...);
 PyAPI_FUNC(int) _PyArg_ParseTuple_SizeT(PyObject *, const char *, ...);
@@ -2867,7 +2863,3 @@ _PyArg_Fini(void)
     }
     _PyRuntime.getargs.static_parsers = NULL;
 }
-
-#ifdef __cplusplus
-};
-#endif

Python/getopt.c

@@ -29,10 +29,6 @@
 #include <wchar.h>
 #include "pycore_getopt.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 int _PyOS_opterr = 1;                 /* generate error messages */
 Py_ssize_t _PyOS_optind = 1;          /* index into argv array   */
 const wchar_t *_PyOS_optarg = NULL;   /* optional argument       */
@@ -172,8 +168,3 @@ int _PyOS_GetOpt(Py_ssize_t argc, wchar_t * const *argv, int *longindex)
 
     return option;
 }
-
-#ifdef __cplusplus
-}
-#endif
-

Python/import.c

@@ -24,9 +24,6 @@
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
-#ifdef __cplusplus
-extern "C" {
-#endif
 
 
 /*[clinic input]
@@ -3887,8 +3884,3 @@ PyInit__imp(void)
 {
     return PyModuleDef_Init(&imp_module);
 }
-
-
-#ifdef __cplusplus
-}
-#endif

Python/pathconfig.c

@@ -16,10 +16,6 @@
 #  include <shlwapi.h>
 #endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 
 /* External interface */
 
@@ -500,8 +496,3 @@ _PyPathConfig_ComputeSysPath0(const PyWideStringList *argv, PyObject **path0_p)
     *path0_p = path0_obj;
     return 1;
 }
-
-
-#ifdef __cplusplus
-}
-#endif

Python/pyhash.c

@@ -14,10 +14,6 @@
 #  include <sys/endian.h>
 #endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 _Py_HashSecret_t _Py_HashSecret = {{0}};
 
 #if Py_HASH_ALGORITHM == Py_HASH_EXTERNAL
@@ -503,7 +499,3 @@ pysiphash(const void *src, Py_ssize_t src_sz) {
 
 static PyHash_FuncDef PyHash_Func = {pysiphash, "siphash24", 64, 128};
 #endif
-
-#ifdef __cplusplus
-}
-#endif

Python/pylifecycle.c

@@ -61,11 +61,6 @@
 #define PUTS(fd, str) (void)_Py_write_noraise(fd, str, (int)strlen(str))
 
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
 /* Forward declarations */
 static PyStatus add_main_module(PyInterpreterState *interp);
 static PyStatus init_import_site(void);
@@ -3139,7 +3134,3 @@ PyOS_setsig(int sig, PyOS_sighandler_t handler)
     return oldhandler;
 #endif
 }
-
-#ifdef __cplusplus
-}
-#endif

Python/pystate.c

@@ -29,16 +29,12 @@ to avoid the expense of doing their own locking).
 -------------------------------------------------------------------------- */
 
 #ifdef HAVE_DLOPEN
-#ifdef HAVE_DLFCN_H
-#include <dlfcn.h>
-#endif
-#if !HAVE_DECL_RTLD_LAZY
-#define RTLD_LAZY 1
-#endif
-#endif
-
-#ifdef __cplusplus
-extern "C" {
+#  ifdef HAVE_DLFCN_H
+#    include <dlfcn.h>
+#  endif
+#  if !HAVE_DECL_RTLD_LAZY
+#    define RTLD_LAZY 1
+#  endif
 #endif
 
 
@@ -2985,8 +2981,3 @@ _PyThreadState_MustExit(PyThreadState *tstate)
     }
     return 1;
 }
-
-
-#ifdef __cplusplus
-}
-#endif

Python/pythonrun.c

@@ -37,11 +37,6 @@
 #  include "windows.h"
 #endif
 
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* Forward */
 static void flush_io(void);
 static PyObject *run_mod(mod_ty, PyObject *, PyObject *, PyObject *,
@@ -2017,7 +2012,3 @@ PyRun_InteractiveLoop(FILE *f, const char *p)
 {
     return PyRun_InteractiveLoopFlags(f, p, NULL);
 }
-
-#ifdef __cplusplus
-}
-#endif

Python/sysmodule.c

@@ -2039,11 +2039,6 @@ sys_call_tracing_impl(PyObject *module, PyObject *func, PyObject *funcargs)
     return _PyEval_CallTracing(func, funcargs);
 }
 
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /*[clinic input]
 sys._debugmallocstats
 
@@ -2072,10 +2067,6 @@ sys__debugmallocstats_impl(PyObject *module)
 extern PyObject *_Py_GetObjects(PyObject *, PyObject *);
 #endif
 
-#ifdef __cplusplus
-}
-#endif
-
 
 /*[clinic input]
 sys._clear_type_cache
@@ -2297,11 +2288,6 @@ sys__getframemodulename_impl(PyObject *module, int depth)
     return Py_NewRef(r);
 }
 
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 static PerfMapState perf_map_state;
 
 PyAPI_FUNC(int) PyUnstable_PerfMapState_Init(void) {
@@ -2370,10 +2356,6 @@ PyAPI_FUNC(void) PyUnstable_PerfMapState_Fini(void) {
 #endif
 }
 
-#ifdef __cplusplus
-}
-#endif
-
 
 static PyMethodDef sys_methods[] = {
     /* Might as well keep this in alphabetic order */