glibc: replace extern __inline with __extern_inline.

* this helps to comply with C99. As a reminder, some of these headers
are also used by x86_gcc2 src/libs/stdc++.

src/system/libroot/posix/glibc/ctype/ctype.h

@@ -164,13 +164,13 @@ __exctype (_tolower);
 # endif
 
 # ifdef __USE_EXTERN_INLINES
-extern __inline int
+__extern_inline int
 tolower (int __c) __THROW
 {
   return __c >= -128 && __c < 256 ? __ctype_tolower[__c] : __c;
 }
 
-extern __inline int
+__extern_inline int
 toupper (int __c) __THROW
 {
   return __c >= -128 && __c < 256 ? __ctype_toupper[__c] : __c;

src/system/libroot/posix/glibc/include/allocalim.h

@@ -1,5 +1,5 @@
 #ifndef _EXTERN_INLINE
-#define _EXTERN_INLINE extern inline
+#define _EXTERN_INLINE __extern_inline
 #endif
 _EXTERN_INLINE int __libc_use_alloca (size_t size)
 {

src/system/libroot/posix/glibc/include/arch/x86_64/bits/mathinline.h

@@ -22,10 +22,10 @@
 
 #define __NTH(fct)    __attribute__ ((__nothrow__)) fct
 
-#ifdef __cplusplus
+#ifndef __extern_always_inline
 # define __MATH_INLINE __inline
 #else
-# define __MATH_INLINE extern __inline
+# define __MATH_INLINE __extern_always_inline
 #endif
 
 

src/system/libroot/posix/glibc/include/bits/stdio.h

@@ -24,7 +24,7 @@
 #ifdef __cplusplus
 # define __STDIO_INLINE inline
 #else
-# define __STDIO_INLINE extern __inline
+# define __STDIO_INLINE __extern_inline
 #endif
 
 

src/system/libroot/posix/glibc/include/misc/sys/cdefs.h

@@ -226,6 +226,38 @@
 # define __attribute_format_strfmon__(a,b) /* Ignore */
 #endif
 
+
+/* Forces a function to be always inlined.  */
+#if __GNUC_PREREQ (3,2)
+# define __always_inline __inline __attribute__ ((__always_inline__))
+#else
+# define __always_inline __inline
+#endif
+
+/* Associate error messages with the source location of the call site rather
+   than with the source location inside the function.  */
+#if __GNUC_PREREQ (4,3)
+# define __attribute_artificial__ __attribute__ ((__artificial__))
+#else
+# define __attribute_artificial__ /* Ignore */
+#endif
+
+/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
+   inline semantics, unless -fgnu89-inline is used.  */
+#if !defined __cplusplus || __GNUC_PREREQ (4,3)
+# if defined __GNUC_STDC_INLINE__ || defined __cplusplus
+#  define __extern_inline extern __inline __attribute__ ((__gnu_inline__))
+#  define __extern_always_inline \
+  extern __always_inline __attribute__ ((__gnu_inline__))
+# else
+#  define __extern_inline extern __inline
+#  define __extern_always_inline extern __always_inline
+# endif
+#else
+#  define __extern_inline extern __inline
+#endif
+
+
 /* It is possible to compile containing GCC extensions even if GCC is
    run in pedantic mode if the uses are carefully marked using the
    `__extension__' keyword.  But this is not generally available before

src/system/libroot/posix/glibc/stdlib/gmp.h

@@ -21,6 +21,8 @@ MA 02111-1307, USA. */
 
 #ifndef __GMP_H__
 
+#include <features.h>
+
 #ifndef __GNU_MP__
 #define __GNU_MP__ 2
 #define __need_size_t
@@ -41,7 +43,7 @@ MA 02111-1307, USA. */
 
 #ifndef _EXTERN_INLINE
 #ifdef __GNUC__
-#define _EXTERN_INLINE extern __inline__
+#define _EXTERN_INLINE __extern_inline
 #else
 #define _EXTERN_INLINE static
 #endif

src/system/libroot/posix/glibc/stdlib/stdlib.h

@@ -306,18 +306,18 @@ extern unsigned long long int __strtoull_internal (__const char *
 /* Define inline functions which call the internal entry points.  */
 
 __BEGIN_NAMESPACE_STD
-extern __inline double
+__extern_inline double
 strtod (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
 {
   return __strtod_internal (__nptr, __endptr, 0);
 }
-extern __inline long int
+__extern_inline long int
 strtol (__const char *__restrict __nptr, char **__restrict __endptr,
 	int __base) __THROW
 {
   return __strtol_internal (__nptr, __endptr, __base, 0);
 }
-extern __inline unsigned long int
+__extern_inline unsigned long int
 strtoul (__const char *__restrict __nptr, char **__restrict __endptr,
 	 int __base) __THROW
 {
@@ -327,12 +327,12 @@ __END_NAMESPACE_STD
 
 # ifdef __USE_ISOC99
 __BEGIN_NAMESPACE_C99
-extern __inline float
+__extern_inline float
 strtof (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
 {
   return __strtof_internal (__nptr, __endptr, 0);
 }
-extern __inline long double
+__extern_inline long double
 strtold (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
 {
   return __strtold_internal (__nptr, __endptr, 0);
@@ -341,13 +341,13 @@ __END_NAMESPACE_C99
 # endif
 
 # ifdef __USE_BSD
-__extension__ extern __inline long long int
+__extension__ __extern_inline long long int
 strtoq (__const char *__restrict __nptr, char **__restrict __endptr,
 	int __base) __THROW
 {
   return __strtoll_internal (__nptr, __endptr, __base, 0);
 }
-__extension__ extern __inline unsigned long long int
+__extension__ __extern_inline unsigned long long int
 strtouq (__const char *__restrict __nptr, char **__restrict __endptr,
 	 int __base) __THROW
 {
@@ -357,13 +357,13 @@ strtouq (__const char *__restrict __nptr, char **__restrict __endptr,
 
 # if defined __USE_MISC || defined __USE_ISOC99
 __BEGIN_NAMESPACE_C99
-__extension__ extern __inline long long int
+__extension__ __extern_inline long long int
 strtoll (__const char *__restrict __nptr, char **__restrict __endptr,
 	 int __base) __THROW
 {
   return __strtoll_internal (__nptr, __endptr, __base, 0);
 }
-__extension__ extern __inline unsigned long long int
+__extension__ __extern_inline unsigned long long int
 strtoull (__const char * __restrict __nptr, char **__restrict __endptr,
 	  int __base) __THROW
 {
@@ -373,17 +373,17 @@ __END_NAMESPACE_C99
 # endif
 
 __BEGIN_NAMESPACE_STD
-extern __inline double
+__extern_inline double
 atof (__const char *__nptr) __THROW
 {
   return strtod (__nptr, (char **) NULL);
 }
-extern __inline int
+__extern_inline int
 atoi (__const char *__nptr) __THROW
 {
   return (int) strtol (__nptr, (char **) NULL, 10);
 }
-extern __inline long int
+__extern_inline long int
 atol (__const char *__nptr) __THROW
 {
   return strtol (__nptr, (char **) NULL, 10);
@@ -392,7 +392,7 @@ __END_NAMESPACE_STD
 
 # if defined __USE_MISC || defined __USE_ISOC99
 __BEGIN_NAMESPACE_C99
-__extension__ extern __inline long long int
+__extension__ __extern_inline long long int
 atoll (__const char *__nptr) __THROW
 {
   return strtoll (__nptr, (char **) NULL, 10);

src/system/libroot/posix/glibc/string/bits/string2.h

@@ -43,7 +43,7 @@
 # ifdef __cplusplus
 #  define __STRING_INLINE inline
 # else
-#  define __STRING_INLINE extern __inline
+#  define __STRING_INLINE __extern_inline
 # endif
 #endif
 

src/system/libroot/posix/glibc/wcsmbs/wchar.h

@@ -218,34 +218,34 @@ extern unsigned long long int __wcstoull_internal (__const wchar_t *
 #if defined __OPTIMIZE__ && __GNUC__ >= 2
 /* Define inline functions which call the internal entry points.  */
 
-extern __inline double wcstod (__const wchar_t *__restrict __nptr,
+__extern_inline double wcstod (__const wchar_t *__restrict __nptr,
 			       wchar_t **__restrict __endptr) __THROW
 { return __wcstod_internal (__nptr, __endptr, 0); }
-extern __inline long int wcstol (__const wchar_t *__restrict __nptr,
+__extern_inline long int wcstol (__const wchar_t *__restrict __nptr,
                                  wchar_t **__restrict __endptr,
 				 int __base) __THROW
 { return __wcstol_internal (__nptr, __endptr, __base, 0); }
-extern __inline unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
+__extern_inline unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
                                            wchar_t **__restrict __endptr,
 					   int __base) __THROW
 { return __wcstoul_internal (__nptr, __endptr, __base, 0); }
 
 # ifdef __USE_GNU
-extern __inline float wcstof (__const wchar_t *__restrict __nptr,
+__extern_inline float wcstof (__const wchar_t *__restrict __nptr,
 			      wchar_t **__restrict __endptr) __THROW
 { return __wcstof_internal (__nptr, __endptr, 0); }
-extern __inline long double wcstold (__const wchar_t *__restrict __nptr,
+__extern_inline long double wcstold (__const wchar_t *__restrict __nptr,
 				     wchar_t **__restrict __endptr) __THROW
 { return __wcstold_internal (__nptr, __endptr, 0); }
 
 
 __extension__
-extern __inline long long int wcstoq (__const wchar_t *__restrict __nptr,
+__extern_inline long long int wcstoq (__const wchar_t *__restrict __nptr,
 				      wchar_t **__restrict __endptr,
 				      int __base) __THROW
 { return __wcstoll_internal (__nptr, __endptr, __base, 0); }
 __extension__
-extern __inline unsigned long long int wcstouq (__const wchar_t *
+__extern_inline unsigned long long int wcstouq (__const wchar_t *
 						__restrict __nptr,
 						wchar_t **__restrict __endptr,
 						int __base) __THROW