make safe_read usable in a mixed C/C++ build

[Bruno Haible]

Hi Jim,

For some complicated reasons (too long to explain here), gettext needs to
use safe-read.h with a C++ compiler on mingw and cygwin. Is this patch ok
with you?


2006-12-23  Bruno Haible  <address@hidden>

        * lib/safe-read.h [C++]: Wrap declarations in extern "C".

*** gnulib-20061208/lib/safe-read.h.bak 2005-05-14 08:03:58.000000000 +0200
--- gnulib-20061208/lib/safe-read.h     2006-12-23 05:45:53.000000000 +0100
***************
*** 1,5 ****
  /* An interface to read() that retries after interrupts.
!    Copyright (C) 2002 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
--- 1,5 ----
  /* An interface to read() that retries after interrupts.
!    Copyright (C) 2002, 2006 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
***************
*** 17,25 ****
--- 17,35 ----
  
  #include <stddef.h>
  
+ #ifdef __cplusplus
+ extern "C" {
+ #endif
+ 
+ 
  #define SAFE_READ_ERROR ((size_t) -1)
  
  /* Read up to COUNT bytes at BUF from descriptor FD, retrying if interrupted.
     Return the actual number of bytes read, zero for EOF, or SAFE_READ_ERROR
     upon error.  */
  extern size_t safe_read (int fd, void *buf, size_t count);
+ 
+ 
+ #ifdef __cplusplus
+ }
+ #endif