[avr-libc-dev] [bug #36454] string.h: Error for long long in C90

[Georg-Johann Lay]

URL:
  <http://savannah.nongnu.org/bugs/?36454>

                 Summary: string.h: Error for long long in C90
                 Project: AVR C Runtime Library
            Submitted by: gjlayde
            Submitted on: Sa 12 Mai 2012 08:27:10 GMT
                Category: Header
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 1.8.0
           Fixed Release: None

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Details:

string.h contains the following lines:

# define __ATTR_CONST__ __attribute__((__const__))
extern int ffsll (long long __val) __ATTR_CONST__;

long long is available since C99. Consequently, compiling or syntax-checking
the above line with C90 may run into

error: ISO C90 does not support 'long long' [-Wlong-long]

This is particularly inconvenient in the avr-gcc testsuite, for example,
because it's not appropriate to add -Wno-long-long to the testsuite or use
similar hacks.

Such prototypes should be shielded against C90 by, say,

#if defined __STDC_VERSION__ \
    && __STDC_VERSION__ >= 199900 \
    && !defined __cplusplus

or similar.

Likewise for other places that use long long, if any.




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