Prepare headers for use in ISO C++ compliant implementations.

12 files changed, 364 insertions, 97 deletions

diff --git a/ctype/ctype.h b/ctype/ctype.h
index 4a8ce30d04..47fba836ca 100644
--- a/ctype/ctype.h
+++ b/ctype/ctype.h
@@ -85,6 +85,8 @@ extern __const __int32_t *__ctype_toupper; /* Case conversions.  */
 
 #define	__exctype(name)	extern int name (int) __THROW
 
+
+__BEGIN_NAMESPACE_STD
 /* The following names are all functions:
      int isCHARACTERISTIC(int c);
    which return nonzero iff C has CHARACTERISTIC.
@@ -101,10 +103,6 @@ __exctype (isspace);
 __exctype (isupper);
 __exctype (isxdigit);
 
-#ifdef	__USE_ISOC99
-__exctype (isblank);
-#endif
-
 
 /* Return the lowercase version of C.  */
 extern int tolower (int __c) __THROW;
@@ -112,6 +110,17 @@ extern int tolower (int __c) __THROW;
 /* Return the uppercase version of C.  */
 extern int toupper (int __c) __THROW;
 
+__END_NAMESPACE_STD
+
+
+/* ISO C99 introduced one new function.  */
+#ifdef	__USE_ISOC99
+__BEGIN_NAMESPACE_C99
+
+__exctype (isblank);
+
+__END_NAMESPACE_C99
+#endif
 
 #if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
 
@@ -147,7 +156,7 @@ __exctype (_tolower);
 	__res = a[(int) (c)];						      \
       __res; }))
 
-#ifndef	__NO_CTYPE
+#if !defined __NO_CTYPE && !defined __cplusplus
 # define isalnum(c)	__isctype((c), _ISalnum)
 # define isalpha(c)	__isctype((c), _ISalpha)
 # define iscntrl(c)	__isctype((c), _IScntrl)
diff --git a/libio/stdio.h b/libio/stdio.h
index 10bd6e5e88..3acaa8bd97 100644
--- a/libio/stdio.h
+++ b/libio/stdio.h
@@ -41,8 +41,15 @@ __BEGIN_DECLS
 
 #if !defined __FILE_defined && defined __need_FILE
 
+__BEGIN_NAMESPACE_STD
 /* The opaque type of streams.  This is the definition used elsewhere.  */
 typedef struct _IO_FILE FILE;
+__END_NAMESPACE_STD
+#if defined __USE_LARGEFILE64 || defined __USE_SVID || defined __USE_POSIX \
+    || defined __USE_BSD || defined __USE_ISOC99 || defined __USE_XOPEN \
+    || defined __USE_POSIX2
+__USING_NAMESPACE_STD(FILE)
+#endif
 
 # define __FILE_defined	1
 #endif /* FILE not defined.  */
@@ -76,11 +83,13 @@ typedef _G_va_list va_list;
 #endif
 
 /* The type of the second argument to `fgetpos' and `fsetpos'.  */
+__BEGIN_NAMESPACE_STD
 #ifndef __USE_FILE_OFFSET64
 typedef _G_fpos_t fpos_t;
 #else
 typedef _G_fpos64_t fpos_t;
 #endif
+__END_NAMESPACE_STD
 #ifdef __USE_LARGEFILE64
 typedef _G_fpos64_t fpos64_t;
 #endif
@@ -130,20 +139,23 @@ typedef _G_fpos64_t fpos64_t;
 
 
 /* Standard streams.  */
-extern FILE *stdin;		/* Standard input stream.  */
-extern FILE *stdout;		/* Standard output stream.  */
-extern FILE *stderr;		/* Standard error output stream.  */
+extern struct _IO_FILE *stdin;		/* Standard input stream.  */
+extern struct _IO_FILE *stdout;		/* Standard output stream.  */
+extern struct _IO_FILE *stderr;		/* Standard error output stream.  */
 /* C89/C99 say they're macros.  Make them happy.  */
 #define stdin stdin
 #define stdout stdout
 #define stderr stderr
 
+__BEGIN_NAMESPACE_STD
 /* Remove file FILENAME.  */
 extern int remove (__const char *__filename) __THROW;
 /* Rename file OLD to NEW.  */
 extern int rename (__const char *__old, __const char *__new) __THROW;
+__END_NAMESPACE_STD
 
 
+__BEGIN_NAMESPACE_STD
 /* Create a temporary file and open it read/write.  */
 #ifndef __USE_FILE_OFFSET64
 extern FILE *tmpfile (void) __THROW;
@@ -154,11 +166,14 @@ extern FILE *__REDIRECT (tmpfile, (void) __THROW, tmpfile64);
 #  define tmpfile tmpfile64
 # endif
 #endif
+
+/* Generate a temporary filename.  */
+extern char *tmpnam (char *__s) __THROW;
+__END_NAMESPACE_STD
+
 #ifdef __USE_LARGEFILE64
 extern FILE *tmpfile64 (void) __THROW;
 #endif
-/* Generate a temporary filename.  */
-extern char *tmpnam (char *__s) __THROW;
 
 #ifdef __USE_MISC
 /* This is the reentrant variant of `tmpnam'.  The only difference is
@@ -180,10 +195,12 @@ extern char *tempnam (__const char *__dir, __const char *__pfx)
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 /* Close STREAM.  */
 extern int fclose (FILE *__stream) __THROW;
 /* Flush STREAM, or all streams if STREAM is NULL.  */
 extern int fflush (FILE *__stream) __THROW;
+__END_NAMESPACE_STD
 
 #ifdef __USE_MISC
 /* Faster versions when locking is not required.  */
@@ -196,6 +213,7 @@ extern int fcloseall (void) __THROW;
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 #ifndef __USE_FILE_OFFSET64
 /* Open a file and create a new stream for it.  */
 extern FILE *fopen (__const char *__restrict __filename,
@@ -218,6 +236,7 @@ extern FILE *__REDIRECT (freopen, (__const char *__restrict __filename,
 #  define freopen freopen64
 # endif
 #endif
+__END_NAMESPACE_STD
 #ifdef __USE_LARGEFILE64
 extern FILE *fopen64 (__const char *__restrict __filename,
 		      __const char *__restrict __modes) __THROW;
@@ -249,6 +268,7 @@ extern FILE *open_memstream (char **__restrict __bufloc,
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 /* If BUF is NULL, make STREAM unbuffered.
    Else make it use buffer BUF, of size BUFSIZ.  */
 extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
@@ -257,6 +277,7 @@ extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __THROW;
    else allocate an internal buffer N bytes long.  */
 extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
 		    int __modes, size_t __n) __THROW;
+__END_NAMESPACE_STD
 
 #ifdef	__USE_BSD
 /* If BUF is NULL, make STREAM unbuffered.
@@ -269,6 +290,7 @@ extern void setlinebuf (FILE *__stream) __THROW;
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 /* Write formatted output to STREAM.  */
 extern int fprintf (FILE *__restrict __stream,
 		    __const char *__restrict __format, ...) __THROW;
@@ -287,8 +309,10 @@ extern int vprintf (__const char *__restrict __format, _G_va_list __arg)
 /* Write formatted output to S from argument list ARG.  */
 extern int vsprintf (char *__restrict __s, __const char *__restrict __format,
 		     _G_va_list __arg) __THROW;
+__END_NAMESPACE_STD
 
 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
+__BEGIN_NAMESPACE_C99
 /* Maximum chars of output to write in MAXLEN.  */
 extern int snprintf (char *__restrict __s, size_t __maxlen,
 		     __const char *__restrict __format, ...)
@@ -297,6 +321,7 @@ extern int snprintf (char *__restrict __s, size_t __maxlen,
 extern int vsnprintf (char *__restrict __s, size_t __maxlen,
 		      __const char *__restrict __format, _G_va_list __arg)
      __THROW __attribute__ ((__format__ (__printf__, 3, 0)));
+__END_NAMESPACE_C99
 #endif
 
 #ifdef __USE_GNU
@@ -321,6 +346,7 @@ extern int dprintf (int __fd, __const char *__restrict __fmt, ...)
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 /* Read formatted input from STREAM.  */
 extern int fscanf (FILE *__restrict __stream,
 		   __const char *__restrict __format, ...) __THROW;
@@ -329,8 +355,10 @@ extern int scanf (__const char *__restrict __format, ...) __THROW;
 /* Read formatted input from S.  */
 extern int sscanf (__const char *__restrict __s,
 		   __const char *__restrict __format, ...) __THROW;
+__END_NAMESPACE_STD
 
 #ifdef	__USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Read formatted input from S into argument list ARG.  */
 extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format,
 		    _G_va_list __arg)
@@ -344,15 +372,18 @@ extern int vscanf (__const char *__restrict __format, _G_va_list __arg)
 extern int vsscanf (__const char *__restrict __s,
 		    __const char *__restrict __format, _G_va_list __arg)
      __THROW __attribute__ ((__format__ (__scanf__, 2, 0)));
+__END_NAMESPACE_C99
 #endif /* Use ISO C9x.  */
 
 
+__BEGIN_NAMESPACE_STD
 /* Read a character from STREAM.  */
 extern int fgetc (FILE *__stream) __THROW;
 extern int getc (FILE *__stream) __THROW;
 
 /* Read a character from stdin.  */
 extern int getchar (void) __THROW;
+__END_NAMESPACE_STD
 
 /* The C standard explicitly says this is a macro, so we always do the
    optimization for it.  */
@@ -370,12 +401,14 @@ extern int fgetc_unlocked (FILE *__stream) __THROW;
 #endif /* Use MISC.  */
 
 
+__BEGIN_NAMESPACE_STD
 /* Write a character to STREAM.  */
 extern int fputc (int __c, FILE *__stream) __THROW;
 extern int putc (int __c, FILE *__stream) __THROW;
 
 /* Write a character to stdout.  */
 extern int putchar (int __c) __THROW;
+__END_NAMESPACE_STD
 
 /* The C standard explicitly says this can be a macro,
    so we always do the optimization for it.  */
@@ -402,20 +435,22 @@ extern int putw (int __w, FILE *__stream) __THROW;
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 /* Get a newline-terminated string of finite length from STREAM.  */
 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
      __THROW;
 
+/* Get a newline-terminated string from stdin, removing the newline.
+   DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.  */
+extern char *gets (char *__s) __THROW;
+__END_NAMESPACE_STD
+
 #ifdef __USE_GNU
 /* This function does the same as `fgets' but does not lock the stream.  */
 extern char *fgets_unlocked (char *__restrict __s, int __n,
 			     FILE *__restrict __stream) __THROW;
 #endif
 
-/* Get a newline-terminated string from stdin, removing the newline.
-   DO NOT USE THIS FUNCTION!!  There is no limit on how much it will read.  */
-extern char *gets (char *__s) __THROW;
-
 
 #ifdef	__USE_GNU
 /* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
@@ -437,16 +472,11 @@ extern _IO_ssize_t getline (char **__restrict __lineptr,
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 /* Write a string to STREAM.  */
 extern int fputs (__const char *__restrict __s, FILE *__restrict __stream)
      __THROW;
 
-#ifdef __USE_GNU
-/* This function does the same as `fputs' but does not lock the stream.  */
-extern int fputs_unlocked (__const char *__restrict __s,
-			   FILE *__restrict __stream) __THROW;
-#endif
-
 /* Write a string, followed by a newline, to stdout.  */
 extern int puts (__const char *__s) __THROW;
 
@@ -461,6 +491,13 @@ extern size_t fread (void *__restrict __ptr, size_t __size,
 /* Write chunks of generic data to STREAM.  */
 extern size_t fwrite (__const void *__restrict __ptr, size_t __size,
 		      size_t __n, FILE *__restrict __s) __THROW;
+__END_NAMESPACE_STD
+
+#ifdef __USE_GNU
+/* This function does the same as `fputs' but does not lock the stream.  */
+extern int fputs_unlocked (__const char *__restrict __s,
+			   FILE *__restrict __stream) __THROW;
+#endif
 
 #ifdef __USE_MISC
 /* Faster versions when locking is not necessary.  */
@@ -471,26 +508,41 @@ extern size_t fwrite_unlocked (__const void *__restrict __ptr, size_t __size,
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 /* Seek to a certain position on STREAM.  */
 extern int fseek (FILE *__stream, long int __off, int __whence) __THROW;
 /* Return the current position of STREAM.  */
 extern long int ftell (FILE *__stream) __THROW;
 /* Rewind to the beginning of STREAM.  */
 extern void rewind (FILE *__stream) __THROW;
+__END_NAMESPACE_STD
 
 /* The Single Unix Specification, Version 2, specifies an alternative,
    more adequate interface for the two functions above which deal with
    file offset.  `long int' is not the right type.  These definitions
    are originally defined in the Large File Support API.  */
 
-#ifndef __USE_FILE_OFFSET64
-# ifdef __USE_LARGEFILE
+#ifdef __USE_LARGEFILE
+# ifndef __USE_FILE_OFFSET64
 /* Seek to a certain position on STREAM.  */
 extern int fseeko (FILE *__stream, __off_t __off, int __whence) __THROW;
 /* Return the current position of STREAM.  */
 extern __off_t ftello (FILE *__stream) __THROW;
+# else
+#  ifdef __REDIRECT
+extern int __REDIRECT (fseeko,
+		       (FILE *__stream, __off64_t __off, int __whence) __THROW,
+		       fseeko64);
+extern __off64_t __REDIRECT (ftello, (FILE *__stream) __THROW, ftello64);
+#  else
+#   define fseeko fseeko64
+#   define ftello ftello64
+#  endif
 # endif
+#endif
 
+__BEGIN_NAMESPACE_STD
+#ifndef __USE_FILE_OFFSET64
 /* Get STREAM's position.  */
 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos)
      __THROW;
@@ -498,26 +550,17 @@ extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos)
 extern int fsetpos (FILE *__stream, __const fpos_t *__pos) __THROW;
 #else
 # ifdef __REDIRECT
-#  ifdef __USE_LARGEFILE
-extern int __REDIRECT (fseeko,
-		       (FILE *__stream, __off64_t __off, int __whence) __THROW,
-		       fseeko64);
-extern __off64_t __REDIRECT (ftello, (FILE *__stream) __THROW, ftello64);
-#  endif
 extern int __REDIRECT (fgetpos, (FILE *__restrict __stream,
 				 fpos_t *__restrict __pos) __THROW, fgetpos64);
 extern int __REDIRECT (fsetpos,
 		       (FILE *__stream, __const fpos_t *__pos) __THROW,
 		       fsetpos64);
 # else
-#  ifdef __USE_LARGEFILE
-#   define fseeko fseeko64
-#   define ftello ftello64
-#  endif
 #  define fgetpos fgetpos64
 #  define fsetpos fsetpos64
 # endif
 #endif
+__END_NAMESPACE_STD
 
 #ifdef __USE_LARGEFILE64
 extern int fseeko64 (FILE *__stream, __off64_t __off, int __whence) __THROW;
@@ -527,12 +570,14 @@ extern int fgetpos64 (FILE *__restrict __stream, fpos64_t *__restrict __pos)
 extern int fsetpos64 (FILE *__stream, __const fpos64_t *__pos) __THROW;
 #endif
 
+__BEGIN_NAMESPACE_STD
 /* Clear the error and EOF indicators for STREAM.  */
 extern void clearerr (FILE *__stream) __THROW;
 /* Return the EOF indicator for STREAM.  */
 extern int feof (FILE *__stream) __THROW;
 /* Return the error indicator for STREAM.  */
 extern int ferror (FILE *__stream) __THROW;
+__END_NAMESPACE_STD
 
 #ifdef __USE_MISC
 /* Faster versions when locking is not required.  */
@@ -542,8 +587,10 @@ extern int ferror_unlocked (FILE *__stream) __THROW;
 #endif
 
 
+__BEGIN_NAMESPACE_STD
 /* Print a message describing the meaning of the value of errno.  */
 extern void perror (__const char *__s) __THROW;
+__END_NAMESPACE_STD
 
 /* Provide the declarations for `sys_errlist' and `sys_nerr' if they
    are available on this system.  Even if available, these variables
diff --git a/locale/locale.h b/locale/locale.h
index 57acb62cd0..1b0296ae4a 100644
--- a/locale/locale.h
+++ b/locale/locale.h
@@ -119,12 +119,17 @@ struct lconv
 };
 
 
+__BEGIN_NAMESPACE_STD
+
 /* Set and/or return the current locale.  */
 extern char *setlocale (int __category, __const char *__locale) __THROW;
 
 /* Return the numeric/monetary information for the current locale.  */
 extern struct lconv *localeconv (void) __THROW;
 
+__END_NAMESPACE_STD
+
+
 #ifdef	__USE_GNU
 /* The concept of one static locale per category is not very well
    thought out.  Many applications will need to process its data using
diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
index 12fcfce022..59d4eb88f7 100644
--- a/math/bits/mathcalls.h
+++ b/math/bits/mathcalls.h
@@ -1,5 +1,5 @@
 /* Prototype declarations for math functions; helper file for <math.h>.
-   Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
+   Copyright (C) 1996-2001, 2002 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -44,12 +44,13 @@
    NAME, to make token pasting work with -traditional.  */
 
 #ifndef _MATH_H
- #error "Never include <bits/mathcalls.h> directly; include <math.h> instead."
+# error "Never include <bits/mathcalls.h> directly; include <math.h> instead."
 #endif
 
 
 /* Trigonometric functions.  */
 
+_Mdouble_BEGIN_NAMESPACE
 /* Arc cosine of X.  */
 __MATHCALL (acos,, (_Mdouble_ __x));
 /* Arc sine of X.  */
@@ -66,12 +67,6 @@ __MATHCALL (sin,, (_Mdouble_ __x));
 /* Tangent of X.  */
 __MATHCALL (tan,, (_Mdouble_ __x));
 
-#ifdef __USE_GNU
-/* Cosine and sine of X.  */
-__MATHDECL (void,sincos,,
-	    (_Mdouble_ __x, _Mdouble_ *__sinx, _Mdouble_ *__cosx));
-#endif
-
 /* Hyperbolic functions.  */
 
 /* Hyperbolic cosine of X.  */
@@ -80,28 +75,31 @@ __MATHCALL (cosh,, (_Mdouble_ __x));
 __MATHCALL (sinh,, (_Mdouble_ __x));
 /* Hyperbolic tangent of X.  */
 __MATHCALL (tanh,, (_Mdouble_ __x));
+_Mdouble_END_NAMESPACE
+
+#ifdef __USE_GNU
+/* Cosine and sine of X.  */
+__MATHDECL (void,sincos,,
+	    (_Mdouble_ __x, _Mdouble_ *__sinx, _Mdouble_ *__cosx));
+#endif
 
 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Hyperbolic arc cosine of X.  */
 __MATHCALL (acosh,, (_Mdouble_ __x));
 /* Hyperbolic arc sine of X.  */
 __MATHCALL (asinh,, (_Mdouble_ __x));
 /* Hyperbolic arc tangent of X.  */
 __MATHCALL (atanh,, (_Mdouble_ __x));
+__END_NAMESPACE_C99
 #endif
 
 /* Exponential and logarithmic functions.  */
 
+_Mdouble_BEGIN_NAMESPACE
 /* Exponential function of X.  */
 __MATHCALL (exp,, (_Mdouble_ __x));
 
-#ifdef __USE_GNU
-/* A function missing in all standards: compute exponent to base ten.  */
-__MATHCALL (exp10,, (_Mdouble_ __x));
-/* Another name occasionally used.  */
-__MATHCALL (pow10,, (_Mdouble_ __x));
-#endif
-
 /* Break VALUE into a normalized fraction and an integral power of 2.  */
 __MATHCALL (frexp,, (_Mdouble_ __x, int *__exponent));
 
@@ -116,8 +114,17 @@ __MATHCALL (log10,, (_Mdouble_ __x));
 
 /* Break VALUE into integral and fractional parts.  */
 __MATHCALL (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr));
+_Mdouble_END_NAMESPACE
+
+#ifdef __USE_GNU
+/* A function missing in all standards: compute exponent to base ten.  */
+__MATHCALL (exp10,, (_Mdouble_ __x));
+/* Another name occasionally used.  */
+__MATHCALL (pow10,, (_Mdouble_ __x));
+#endif
 
 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Return exp(X) - 1.  */
 __MATHCALL (expm1,, (_Mdouble_ __x));
 
@@ -126,38 +133,48 @@ __MATHCALL (log1p,, (_Mdouble_ __x));
 
 /* Return the base 2 signed integral exponent of X.  */
 __MATHCALL (logb,, (_Mdouble_ __x));
+__END_NAMESPACE_C99
 #endif
 
 #ifdef __USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Compute base-2 exponential of X.  */
 __MATHCALL (exp2,, (_Mdouble_ __x));
 
 /* Compute base-2 logarithm of X.  */
 __MATHCALL (log2,, (_Mdouble_ __x));
+__END_NAMESPACE_C99
 #endif
 
 
 /* Power functions.  */
 
+_Mdouble_BEGIN_NAMESPACE
 /* Return X to the Y power.  */
 __MATHCALL (pow,, (_Mdouble_ __x, _Mdouble_ __y));
 
 /* Return the square root of X.  */
 __MATHCALL (sqrt,, (_Mdouble_ __x));
+_Mdouble_END_NAMESPACE
 
 #if defined __USE_MISC || defined __USE_XOPEN || defined __USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Return `sqrt(X*X + Y*Y)'.  */
 __MATHCALL (hypot,, (_Mdouble_ __x, _Mdouble_ __y));
+__END_NAMESPACE_C99
 #endif
 
 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Return the cube root of X.  */
 __MATHCALL (cbrt,, (_Mdouble_ __x));
+__END_NAMESPACE_C99
 #endif
 
 
 /* Nearest integer, absolute value, and remainder functions.  */
 
+_Mdouble_BEGIN_NAMESPACE
 /* Smallest integral value not less than X.  */
 __MATHCALLX (ceil,, (_Mdouble_ __x), (__const__));
 
@@ -177,6 +194,7 @@ __MATHDECL_1 (int,__isinf,, (_Mdouble_ __value)) __attribute__ ((__const__));
 
 /* Return nonzero if VALUE is finite and not NaN.  */
 __MATHDECL_1 (int,__finite,, (_Mdouble_ __value)) __attribute__ ((__const__));
+_Mdouble_END_NAMESPACE
 
 #ifdef __USE_MISC
 /* Return 0 if VALUE is finite or NaN, +1 if it
@@ -195,13 +213,17 @@ __MATHCALL (significand,, (_Mdouble_ __x));
 #endif /* Use misc.  */
 
 #if defined __USE_MISC || defined __USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Return X with its signed changed to Y's.  */
 __MATHCALLX (copysign,, (_Mdouble_ __x, _Mdouble_ __y), (__const__));
+__END_NAMESPACE_C99
 #endif
 
 #ifdef __USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Return representation of NaN for double type.  */
 __MATHCALLX (nan,, (__const char *__tagb), (__const__));
+__END_NAMESPACE_C99
 #endif
 
 
@@ -223,14 +245,19 @@ __MATHCALL (yn,, (int, _Mdouble_));
 
 
 #if defined __USE_MISC || defined __USE_XOPEN || defined __USE_ISOC99
+__BEGIN_NAMESPACE_C99
 /* Error and gamma functions.  */
 __MATHCALL (erf,, (_Mdouble_));
 __MATHCALL (erfc,, (_Mdouble_));
 __MATHCALL (lgamma,, (_Mdouble_));
+__END_NAMESPACE_C99
 #endif
 
 #ifdef __USE_ISOC99
+__BEGIN_NAMESPACE_C99
+/* True gamma function.  */
 __MATHCALL (tgamma,, (_Mdouble_));
+__END_NAMESPACE_C99
 #endif
 
 #if defined __USE_MISC || defined __USE_XOPEN
@@ -247,6 +274,7 @@ __MATHCALL (lgamma,_r, (_Mdouble_, int *__signgamp));
 
 
 #if defined __USE_MISC || defined