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Remove C++ namespace handling from glibc headers.

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glibc headers include some code (not particularly consistent or
systematic) to put various declarations in C++ namespaces std and
__c99, if _GLIBCPP_USE_NAMESPACES is defined.

As noted in <https://gcc.gnu.org/ml/libstdc++/2017-03/msg00025.html>,
this macro was removed from libstdc++ in 2000.  I don't expect
compilation with such old versions of libstdc++ to work with current
glibc headers anyway (whereas old *binaries* are expected to stay
working with current glibc); this patch (which should be a no-op with
any libstdc++ version postdating that removal) removes all this code
from the glibc headers.

The begin-end-check.pl test, whose comments say it is about checking
these namespace macro calls, is also removed.  The code in that test
would have covered __BEGIN_DECLS / __END_DECLS as well, but if those
weren't properly matched it would show up with the
check-installed-headers-cxx tests, so I don't think there is an actual
use for keeping begin-end-check.pl with the namespace code removed.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).

	* misc/sys/cdefs.h (__BEGIN_NAMESPACE_STD): Remove macro.
	(__END_NAMESPACE_STD): Likewise.
	(__USING_NAMESPACE_STD): Likewise.
	(__BEGIN_NAMESPACE_C99): Likewise.
	(__END_NAMESPACE_C99): Likewise.
	(__USING_NAMESPACE_C99): Likewise.
	* math/math.h (_Mdouble_BEGIN_NAMESPACE): Do not define and
	undefine macro.
	(_Mdouble_END_NAMESPACE): Likewise.
	* ctype/ctype.h: Do not handle C++ namespaces.
	* libio/bits/stdio-ldbl.h: Likewise.
	* libio/stdio.h: Likewise.
	* locale/locale.h: Likewise.
	* math/bits/mathcalls.h: Likewise.
	* setjmp/setjmp.h: Likewise.
	* signal/signal.h: Likewise.
	* stdlib/bits/stdlib-float.h: Likewise.
	* stdlib/bits/stdlib-ldbl.h: Likewise.
	* stdlib/stdlib.h: Likewise.
	* string/string.h: Likewise.
	* sysdeps/x86/fpu/bits/mathinline.h: Likewise.
	* time/bits/types/clock_t.h: Likewise.
	* time/bits/types/struct_tm.h: Likewise.
	* time/bits/types/time_t.h: Likewise.
	* time/time.h: Likewise.
	* wcsmbs/bits/wchar-ldbl.h: Likewise.
	* wcsmbs/uchar.h: Likewise.
	* wcsmbs/wchar.h: Likewise.
	[_GLIBCPP_USE_NAMESPACES] (wint_t): Remove conditional definition.
	* wctype/wctype.h: Do not handle C++ namespaces.
	* scripts/begin-end-check.pl: Remove.
	* Makefile (installed-headers): Likewise.
	(tests-special): Do not add $(objpfx)begin-end-check.out.
	($(objpfx)begin-end-check.out): Remove.
This commit is contained in:
Joseph Myers
2017-03-16 13:31:57 +00:00
parent d6fc3f6516
commit 2072f5c34e
25 changed files with 37 additions and 411 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
stdlib/stdlib.h
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@ -51,7 +51,6 @@ __BEGIN_DECLS
# endif
#endif /* X/Open or XPG7 and <sys/wait.h> not included. */
__BEGIN_NAMESPACE_STD
/* Returned by `div'. */
typedef struct
{
@ -68,10 +67,8 @@ typedef struct
} ldiv_t;
# define __ldiv_t_defined 1
#endif
__END_NAMESPACE_STD
#if defined __USE_ISOC99 && !defined __lldiv_t_defined
__BEGIN_NAMESPACE_C99
/* Returned by `lldiv'. */
__extension__ typedef struct
{
@ -79,7 +76,6 @@ __extension__ typedef struct
long long int rem; /* Remainder. */
} lldiv_t;
# define __lldiv_t_defined 1
__END_NAMESPACE_C99
#endif
@ -98,7 +94,6 @@ __END_NAMESPACE_C99
extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
__BEGIN_NAMESPACE_STD
/* Convert a string to a floating-point number. */
extern double atof (const char *__nptr)
__THROW __attribute_pure__ __nonnull ((1)) __wur;
@ -108,25 +103,19 @@ extern int atoi (const char *__nptr)
/* Convert a string to a long integer. */
extern long int atol (const char *__nptr)
__THROW __attribute_pure__ __nonnull ((1)) __wur;
__END_NAMESPACE_STD
#ifdef __USE_ISOC99
__BEGIN_NAMESPACE_C99
/* Convert a string to a long long integer. */
__extension__ extern long long int atoll (const char *__nptr)
__THROW __attribute_pure__ __nonnull ((1)) __wur;
__END_NAMESPACE_C99
#endif
__BEGIN_NAMESPACE_STD
/* Convert a string to a floating-point number. */
extern double strtod (const char *__restrict __nptr,
char **__restrict __endptr)
__THROW __nonnull ((1));
__END_NAMESPACE_STD
#ifdef __USE_ISOC99
__BEGIN_NAMESPACE_C99
/* Likewise for `float' and `long double' sizes of floating-point numbers. */
extern float strtof (const char *__restrict __nptr,
char **__restrict __endptr) __THROW __nonnull ((1));
@ -134,10 +123,8 @@ extern float strtof (const char *__restrict __nptr,
extern long double strtold (const char *__restrict __nptr,
char **__restrict __endptr)
__THROW __nonnull ((1));
__END_NAMESPACE_C99
#endif
__BEGIN_NAMESPACE_STD
/* Convert a string to a long integer. */
extern long int strtol (const char *__restrict __nptr,
char **__restrict __endptr, int __base)
@ -146,7 +133,6 @@ extern long int strtol (const char *__restrict __nptr,
extern unsigned long int strtoul (const char *__restrict __nptr,
char **__restrict __endptr, int __base)
__THROW __nonnull ((1));
__END_NAMESPACE_STD
#ifdef __USE_MISC
/* Convert a string to a quadword integer. */
@ -162,7 +148,6 @@ extern unsigned long long int strtouq (const char *__restrict __nptr,
#endif /* Use misc. */
#ifdef __USE_ISOC99
__BEGIN_NAMESPACE_C99
/* Convert a string to a quadword integer. */
__extension__
extern long long int strtoll (const char *__restrict __nptr,
@ -173,7 +158,6 @@ __extension__
extern unsigned long long int strtoull (const char *__restrict __nptr,
char **__restrict __endptr, int __base)
__THROW __nonnull ((1));
__END_NAMESPACE_C99
#endif /* ISO C99 or use MISC. */
/* Convert a floating-point number to a string. */
@ -247,7 +231,6 @@ extern long double strtold_l (const char *__restrict __nptr,
#ifdef __USE_EXTERN_INLINES
__BEGIN_NAMESPACE_STD
__extern_inline int
__NTH (atoi (const char *__nptr))
{
@ -258,16 +241,13 @@ __NTH (atol (const char *__nptr))
{
return strtol (__nptr, (char **) NULL, 10);
}
__END_NAMESPACE_STD
# ifdef __USE_ISOC99
__BEGIN_NAMESPACE_C99
__extension__ __extern_inline long long int
__NTH (atoll (const char *__nptr))
{
return strtoll (__nptr, (char **) NULL, 10);
}
__END_NAMESPACE_C99
# endif
#endif /* Optimizing and Inlining. */
@ -343,12 +323,10 @@ extern int setstate_r (char *__restrict __statebuf,
#endif /* Use extended X/Open || misc. */
__BEGIN_NAMESPACE_STD
/* Return a random integer between 0 and RAND_MAX inclusive. */
extern int rand (void) __THROW;
/* Seed the random number generator with the given number. */
extern void srand (unsigned int __seed) __THROW;
__END_NAMESPACE_STD
#ifdef __USE_POSIX199506
/* Reentrant interface according to POSIX.1. */
@ -431,15 +409,12 @@ extern int lcong48_r (unsigned short int __param[7],
# endif /* Use misc. */
#endif /* Use misc or X/Open. */
__BEGIN_NAMESPACE_STD
/* Allocate SIZE bytes of memory. */
extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
extern void *calloc (size_t __nmemb, size_t __size)
__THROW __attribute_malloc__ __wur;
__END_NAMESPACE_STD
__BEGIN_NAMESPACE_STD
/* Re-allocate the previously allocated block
in PTR, making the new block SIZE bytes long. */
/* __attribute_malloc__ is not used, because if realloc returns
@ -449,7 +424,6 @@ extern void *realloc (void *__ptr, size_t __size)
__THROW __attribute_warn_unused_result__;
/* Free a block allocated by `malloc', `realloc' or `calloc'. */
extern void free (void *__ptr) __THROW;
__END_NAMESPACE_STD
#ifdef __USE_MISC
/* Free a block. An alias for `free'. (Sun Unices). */
@ -478,7 +452,6 @@ extern void *aligned_alloc (size_t __alignment, size_t __size)
__THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur;
#endif
__BEGIN_NAMESPACE_STD
/* Abort execution and generate a core-dump. */
extern void abort (void) __THROW __attribute__ ((__noreturn__));
@ -495,7 +468,6 @@ extern "C++" int at_quick_exit (void (*__func) (void))
extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1));
# endif
#endif
__END_NAMESPACE_STD
#ifdef __USE_MISC
/* Register a function to be called with the status
@ -504,7 +476,6 @@ extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
__THROW __nonnull ((1));
#endif
__BEGIN_NAMESPACE_STD
/* Call all functions registered with `atexit' and `on_exit',
in the reverse of the order in which they were registered,
perform stdio cleanup, and terminate program execution with STATUS. */
@ -516,21 +487,16 @@ extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
execution with STATUS. */
extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
#endif
__END_NAMESPACE_STD
#ifdef __USE_ISOC99
__BEGIN_NAMESPACE_C99
/* Terminate the program with STATUS without calling any of the
functions registered with `atexit' or `on_exit'. */
extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
__END_NAMESPACE_C99
#endif
__BEGIN_NAMESPACE_STD
/* Return the value of envariable NAME, or NULL if it doesn't exist. */
extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
__END_NAMESPACE_STD
#ifdef __USE_GNU
/* This function is similar to the above but returns NULL if the
@ -676,13 +642,11 @@ extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
#endif
__BEGIN_NAMESPACE_STD
/* Execute the given line as a shell command.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int system (const char *__command) __wur;
__END_NAMESPACE_STD
#ifdef __USE_GNU
@ -716,7 +680,6 @@ typedef __compar_fn_t comparison_fn_t;
typedef int (*__compar_d_fn_t) (const void *, const void *, void *);
#endif
__BEGIN_NAMESPACE_STD
/* Do a binary search for KEY in BASE, which consists of NMEMB elements
of SIZE bytes each, using COMPAR to perform the comparisons. */
extern void *bsearch (const void *__key, const void *__base,
@ -741,7 +704,6 @@ extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
/* Return the absolute value of X. */
extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
__END_NAMESPACE_STD
#ifdef __USE_ISOC99
__extension__ extern long long int llabs (long long int __x)
@ -749,7 +711,6 @@ __extension__ extern long long int llabs (long long int __x)
#endif
__BEGIN_NAMESPACE_STD
/* Return the `div_t', `ldiv_t' or `lldiv_t' representation
of the value of NUMER over DENOM. */
/* GCC may have built-ins for these someday. */
@ -757,14 +718,11 @@ extern div_t div (int __numer, int __denom)
__THROW __attribute__ ((__const__)) __wur;
extern ldiv_t ldiv (long int __numer, long int __denom)
__THROW __attribute__ ((__const__)) __wur;
__END_NAMESPACE_STD
#ifdef __USE_ISOC99
__BEGIN_NAMESPACE_C99
__extension__ extern lldiv_t lldiv (long long int __numer,
long long int __denom)
__THROW __attribute__ ((__const__)) __wur;
__END_NAMESPACE_C99
#endif
@ -824,7 +782,6 @@ extern int qfcvt_r (long double __value, int __ndigit,
#endif /* misc */
__BEGIN_NAMESPACE_STD
/* Return the length of the multibyte character
in S, which is no longer than N. */
extern int mblen (const char *__s, size_t __n) __THROW;
@ -844,7 +801,6 @@ extern size_t mbstowcs (wchar_t *__restrict __pwcs,
extern size_t wcstombs (char *__restrict __s,
const wchar_t *__restrict __pwcs, size_t __n)
__THROW;
__END_NAMESPACE_STD
#ifdef __USE_MISC