[libc++] Don't give functions C linkage

libcxx/include/__config

@@ -572,10 +572,6 @@ typedef __char32_t char32_t;
 #  endif
 #  define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
 
-// This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern
-// "C" function, as those lack mangling.
-#  define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
-
 #  ifdef _LIBCPP_BUILDING_LIBRARY
 #    if _LIBCPP_ABI_VERSION > 1
 #      define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI

libcxx/include/__locale_dir/locale_base_api/android.h

@@ -42,26 +42,18 @@ extern "C" {
 #          include <__support/xlocale/__strtonum_fallback.h>
 #        elif __ANDROID_API__ < 26
 
-#          if defined(__cplusplus)
-extern "C" {
-#          endif
-
-inline _LIBCPP_HIDE_FROM_ABI_C float strtof_l(const char* __nptr, char** __endptr, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI float strtof_l(const char* __nptr, char** __endptr, locale_t) {
   return ::strtof(__nptr, __endptr);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C double strtod_l(const char* __nptr, char** __endptr, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI double strtod_l(const char* __nptr, char** __endptr, locale_t) {
   return ::strtod(__nptr, __endptr);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C long strtol_l(const char* __nptr, char** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long strtol_l(const char* __nptr, char** __endptr, int __base, locale_t) {
   return ::strtol(__nptr, __endptr, __base);
 }
 
-#          if defined(__cplusplus)
-}
-#          endif
-
 #        endif // __ANDROID_API__ < 26
 
 #      endif // __NDK_MAJOR__ <= 16

libcxx/include/__locale_dir/locale_base_api/ibm.h

@@ -20,10 +20,6 @@
 
 #include "cstdlib"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #if defined(__MVS__)
 #  include <wctype.h>
 // POSIX routines
@@ -93,7 +89,8 @@ inline _LIBCPP_HIDE_FROM_ABI unsigned long strtoul_l(const char* __nptr, char**
   return ::strtoul(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI int vasprintf(char** strp, const char* fmt, va_list ap) {
+inline _LIBCPP_HIDE_FROM_ABI
+_LIBCPP_ATTRIBUTE_FORMAT(__printf__, 2, 0) int vasprintf(char** strp, const char* fmt, va_list ap) {
   const size_t buff_size = 256;
   if ((*strp = (char*)malloc(buff_size)) == NULL) {
     return -1;
@@ -118,7 +115,4 @@ inline _LIBCPP_HIDE_FROM_ABI int vasprintf(char** strp, const char* fmt, va_list
   return str_size;
 }
 
-#ifdef __cplusplus
-}
-#endif
 #endif // _LIBCPP___LOCALE_LOCALE_BASE_API_IBM_H

libcxx/include/__locale_dir/locale_base_api/musl.h

@@ -20,34 +20,25 @@
 #include <cstdlib>
 #include <cwchar>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-inline _LIBCPP_HIDE_FROM_ABI_C long long strtoll_l(const char* __nptr, char** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long long strtoll_l(const char* __nptr, char** __endptr, int __base, locale_t) {
   return ::strtoll(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C unsigned long long
-strtoull_l(const char* __nptr, char** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI unsigned long long strtoull_l(const char* __nptr, char** __endptr, int __base, locale_t) {
   return ::strtoull(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C long long wcstoll_l(const wchar_t* __nptr, wchar_t** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long long wcstoll_l(const wchar_t* __nptr, wchar_t** __endptr, int __base, locale_t) {
   return ::wcstoll(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C unsigned long long
+inline _LIBCPP_HIDE_FROM_ABI unsigned long long
 wcstoull_l(const wchar_t* __nptr, wchar_t** __endptr, int __base, locale_t) {
   return ::wcstoull(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C long double wcstold_l(const wchar_t* __nptr, wchar_t** __endptr, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long double wcstold_l(const wchar_t* __nptr, wchar_t** __endptr, locale_t) {
   return ::wcstold(__nptr, __endptr);
 }
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif // _LIBCPP___LOCALE_LOCALE_BASE_API_MUSL_H

libcxx/include/__locale_dir/locale_base_api/openbsd.h

@@ -16,20 +16,12 @@
 #include <ctype.h>
 #include <cwctype>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-inline _LIBCPP_HIDE_FROM_ABI_C long strtol_l(const char* __nptr, char** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long strtol_l(const char* __nptr, char** __endptr, int __base, locale_t) {
   return ::strtol(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C unsigned long strtoul_l(const char* __nptr, char** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI unsigned long strtoul_l(const char* __nptr, char** __endptr, int __base, locale_t) {
   return ::strtoul(__nptr, __endptr, __base);
 }
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif // _LIBCPP___LOCALE_LOCALE_BASE_API_OPENBSD_H

libcxx/include/__support/xlocale/__nop_locale_mgmt.h

@@ -12,20 +12,16 @@
 
 #include <__config>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 // Patch over lack of extended locale support
 typedef void* locale_t;
 
-inline _LIBCPP_HIDE_FROM_ABI_C locale_t duplocale(locale_t) { return NULL; }
+inline _LIBCPP_HIDE_FROM_ABI locale_t duplocale(locale_t) { return NULL; }
 
-inline _LIBCPP_HIDE_FROM_ABI_C void freelocale(locale_t) {}
+inline _LIBCPP_HIDE_FROM_ABI void freelocale(locale_t) {}
 
-inline _LIBCPP_HIDE_FROM_ABI_C locale_t newlocale(int, const char*, locale_t) { return NULL; }
+inline _LIBCPP_HIDE_FROM_ABI locale_t newlocale(int, const char*, locale_t) { return NULL; }
 
-inline _LIBCPP_HIDE_FROM_ABI_C locale_t uselocale(locale_t) { return NULL; }
+inline _LIBCPP_HIDE_FROM_ABI locale_t uselocale(locale_t) { return NULL; }
 
 #define LC_COLLATE_MASK (1 << LC_COLLATE)
 #define LC_CTYPE_MASK (1 << LC_CTYPE)
@@ -36,8 +32,4 @@ inline _LIBCPP_HIDE_FROM_ABI_C locale_t uselocale(locale_t) { return NULL; }
 #define LC_ALL_MASK                                                                                                    \
   (LC_COLLATE_MASK | LC_CTYPE_MASK | LC_MONETARY_MASK | LC_NUMERIC_MASK | LC_TIME_MASK | LC_MESSAGES_MASK)
 
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
 #endif // _LIBCPP___SUPPORT_XLOCALE_NOP_LOCALE_MGMT_H

libcxx/include/__support/xlocale/__posix_l_fallback.h

@@ -25,93 +25,85 @@
 #  include <wctype.h>
 #endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-inline _LIBCPP_HIDE_FROM_ABI_C int isalnum_l(int __c, locale_t) { return ::isalnum(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isalnum_l(int __c, locale_t) { return ::isalnum(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int isalpha_l(int __c, locale_t) { return ::isalpha(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isalpha_l(int __c, locale_t) { return ::isalpha(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int isblank_l(int __c, locale_t) { return ::isblank(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isblank_l(int __c, locale_t) { return ::isblank(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iscntrl_l(int __c, locale_t) { return ::iscntrl(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iscntrl_l(int __c, locale_t) { return ::iscntrl(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int isdigit_l(int __c, locale_t) { return ::isdigit(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isdigit_l(int __c, locale_t) { return ::isdigit(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int isgraph_l(int __c, locale_t) { return ::isgraph(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isgraph_l(int __c, locale_t) { return ::isgraph(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int islower_l(int __c, locale_t) { return ::islower(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int islower_l(int __c, locale_t) { return ::islower(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int isprint_l(int __c, locale_t) { return ::isprint(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isprint_l(int __c, locale_t) { return ::isprint(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int ispunct_l(int __c, locale_t) { return ::ispunct(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int ispunct_l(int __c, locale_t) { return ::ispunct(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int isspace_l(int __c, locale_t) { return ::isspace(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isspace_l(int __c, locale_t) { return ::isspace(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int isupper_l(int __c, locale_t) { return ::isupper(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isupper_l(int __c, locale_t) { return ::isupper(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int isxdigit_l(int __c, locale_t) { return ::isxdigit(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int isxdigit_l(int __c, locale_t) { return ::isxdigit(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int toupper_l(int __c, locale_t) { return ::toupper(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int toupper_l(int __c, locale_t) { return ::toupper(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int tolower_l(int __c, locale_t) { return ::tolower(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int tolower_l(int __c, locale_t) { return ::tolower(__c); }
 
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
-inline _LIBCPP_HIDE_FROM_ABI_C int iswalnum_l(wint_t __c, locale_t) { return ::iswalnum(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswalnum_l(wint_t __c, locale_t) { return ::iswalnum(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswalpha_l(wint_t __c, locale_t) { return ::iswalpha(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswalpha_l(wint_t __c, locale_t) { return ::iswalpha(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswblank_l(wint_t __c, locale_t) { return ::iswblank(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswblank_l(wint_t __c, locale_t) { return ::iswblank(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswcntrl_l(wint_t __c, locale_t) { return ::iswcntrl(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswcntrl_l(wint_t __c, locale_t) { return ::iswcntrl(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswdigit_l(wint_t __c, locale_t) { return ::iswdigit(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswdigit_l(wint_t __c, locale_t) { return ::iswdigit(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswgraph_l(wint_t __c, locale_t) { return ::iswgraph(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswgraph_l(wint_t __c, locale_t) { return ::iswgraph(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswlower_l(wint_t __c, locale_t) { return ::iswlower(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswlower_l(wint_t __c, locale_t) { return ::iswlower(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswprint_l(wint_t __c, locale_t) { return ::iswprint(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswprint_l(wint_t __c, locale_t) { return ::iswprint(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswpunct_l(wint_t __c, locale_t) { return ::iswpunct(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswpunct_l(wint_t __c, locale_t) { return ::iswpunct(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswspace_l(wint_t __c, locale_t) { return ::iswspace(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswspace_l(wint_t __c, locale_t) { return ::iswspace(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswupper_l(wint_t __c, locale_t) { return ::iswupper(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswupper_l(wint_t __c, locale_t) { return ::iswupper(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C int iswxdigit_l(wint_t __c, locale_t) { return ::iswxdigit(__c); }
+inline _LIBCPP_HIDE_FROM_ABI int iswxdigit_l(wint_t __c, locale_t) { return ::iswxdigit(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C wint_t towupper_l(wint_t __c, locale_t) { return ::towupper(__c); }
+inline _LIBCPP_HIDE_FROM_ABI wint_t towupper_l(wint_t __c, locale_t) { return ::towupper(__c); }
 
-inline _LIBCPP_HIDE_FROM_ABI_C wint_t towlower_l(wint_t __c, locale_t) { return ::towlower(__c); }
+inline _LIBCPP_HIDE_FROM_ABI wint_t towlower_l(wint_t __c, locale_t) { return ::towlower(__c); }
 #endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
-inline _LIBCPP_HIDE_FROM_ABI_C int strcoll_l(const char* __s1, const char* __s2, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI int strcoll_l(const char* __s1, const char* __s2, locale_t) {
   return ::strcoll(__s1, __s2);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C size_t strxfrm_l(char* __dest, const char* __src, size_t __n, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI size_t strxfrm_l(char* __dest, const char* __src, size_t __n, locale_t) {
   return ::strxfrm(__dest, __src, __n);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C size_t
+inline _LIBCPP_HIDE_FROM_ABI size_t
 strftime_l(char* __s, size_t __max, const char* __format, const struct tm* __tm, locale_t) {
   return ::strftime(__s, __max, __format, __tm);
 }
 
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
-inline _LIBCPP_HIDE_FROM_ABI_C int wcscoll_l(const wchar_t* __ws1, const wchar_t* __ws2, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI int wcscoll_l(const wchar_t* __ws1, const wchar_t* __ws2, locale_t) {
   return ::wcscoll(__ws1, __ws2);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C size_t wcsxfrm_l(wchar_t* __dest, const wchar_t* __src, size_t __n, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI size_t wcsxfrm_l(wchar_t* __dest, const wchar_t* __src, size_t __n, locale_t) {
   return ::wcsxfrm(__dest, __src, __n);
 }
 #endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif // _LIBCPP___SUPPORT_XLOCALE_POSIX_L_FALLBACK_H

libcxx/include/__support/xlocale/__strtonum_fallback.h

@@ -22,48 +22,39 @@
 #  include <wchar.h>
 #endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-inline _LIBCPP_HIDE_FROM_ABI_C float strtof_l(const char* __nptr, char** __endptr, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI float strtof_l(const char* __nptr, char** __endptr, locale_t) {
   return ::strtof(__nptr, __endptr);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C double strtod_l(const char* __nptr, char** __endptr, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI double strtod_l(const char* __nptr, char** __endptr, locale_t) {
   return ::strtod(__nptr, __endptr);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C long double strtold_l(const char* __nptr, char** __endptr, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long double strtold_l(const char* __nptr, char** __endptr, locale_t) {
   return ::strtold(__nptr, __endptr);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C long long strtoll_l(const char* __nptr, char** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long long strtoll_l(const char* __nptr, char** __endptr, int __base, locale_t) {
   return ::strtoll(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C unsigned long long
-strtoull_l(const char* __nptr, char** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI unsigned long long strtoull_l(const char* __nptr, char** __endptr, int __base, locale_t) {
   return ::strtoull(__nptr, __endptr, __base);
 }
 
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
-inline _LIBCPP_HIDE_FROM_ABI_C long long wcstoll_l(const wchar_t* __nptr, wchar_t** __endptr, int __base, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long long wcstoll_l(const wchar_t* __nptr, wchar_t** __endptr, int __base, locale_t) {
   return ::wcstoll(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C unsigned long long
+inline _LIBCPP_HIDE_FROM_ABI unsigned long long
 wcstoull_l(const wchar_t* __nptr, wchar_t** __endptr, int __base, locale_t) {
   return ::wcstoull(__nptr, __endptr, __base);
 }
 
-inline _LIBCPP_HIDE_FROM_ABI_C long double wcstold_l(const wchar_t* __nptr, wchar_t** __endptr, locale_t) {
+inline _LIBCPP_HIDE_FROM_ABI long double wcstold_l(const wchar_t* __nptr, wchar_t** __endptr, locale_t) {
   return ::wcstold(__nptr, __endptr);
 }
 #endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif // _LIBCPP___SUPPORT_XLOCALE_STRTONUM_FALLBACK_H