On Thu, 13 Jun 2002, Jan Harkes said:
> On Thu, Jun 13, 2002 at 06:25:14PM +0900, Stephen J. Turnbull wrote:
>> c++ -fno-exceptions -fno-operator-names -MD -DHAVE_CONFIG_H -I.
>-I/home/steve/Projects/Coda/coda/include -I/home/steve/Projects/Coda/coda -g -O2
>-c -o dict.o dict.cc
>> In file included from dlist.h:42,
>> from dict.h:76,
>> from dict.cc:37:
>> /usr/include/stdio.h:295: parse error before `throw'
>
> Ehh, what compiler are you using? the #include <stdio.h> is definitely
> within an extern "C" { } declaration, so it shouldn't complain about C++
> keywords in standard C header files.
extern "C" only changes linkage, and doesn't affect e.g. syntactic
correctness.
7.5.7 in my draft C++ Standard covers this:
,----
| 7 Except for functions with internal linkage, a function first declared
| in a linkage-specification behaves as a function with external link-
| age. [Example:
| extern "C" double f();
| static double f(); // error
| is ill-formed (_dcl.stc_). ] The form of linkage-specification that
| contains a braced-enclosed declaration-seq does not affect whether the
| contained declarations are definitions or not (_basic.def_); the form
| of linkage-specification directly containing a single declaration is
| treated as an extern specifier (_dcl.stc_) for the purpose of deter-
| mining whether the contained declaration is a definition. [Example:
| extern "C" int i; // declaration
| extern "C" {
| int i; // definition
| }
| --end example]
`----
However, that's not the problem here. line 295 in glibc-2.2.5's stdio.h
reads:
/* Maximum chars of output to write in MAXLEN. */
extern int snprintf (char *__restrict __s, size_t __maxlen,
__const char *__restrict __format, ...)
__THROW __attribute__ ((__format__ (__printf__, 3, 4)));
where __THROW expands to throw() in C++ and nothing in C.
The fix is to take out -fno-exceptions, I think: g++ won't let
exception-specifications past under -fno-exceptions. (Yes, this means
-fno-exceptions in C++ on GNU/Linux and GNU/Hurd boxes is pretty
useless.)
--
`What happened?'
`Nick shipped buggy code!'
`Oh, no dinner for him...'
