2012/8/8 Kai Tietz <[email protected]>
> This issue is caused by default of POSIX-printf/scanf for g++. The
> reason is that g++ applies to printf/scanf functions two times
> formatting rules. One time automagical as system-default, and
> secondly as specified by headers. So those warnings are occuring.
> This might be worth a bug report on gcc's bugzilla.
>
Further reduction to (removed unistd.h):
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <fstream>
int main(int argc,char **argv)
{
uint64_t val=1234567890;
printf("%"PRId64"\n",val);
exit(0);
}
produces this warning with x86_64-w64-mingw32 clang 3.1:
test.cpp:10:14: warning: invalid conversion specifier 'I'
[-Wformat-invalid-specifier]
printf("%"PRId64"\n",val);
~~^
M:/Development/mingw64/bin/../lib/clang/3.1/../../../x86_64-w64-mingw32/include\inttypes.h:42:17:
note:
expanded from macro 'PRId64'
#define PRId64 "I64d"
^
And also a (different) warning with GCC x86_64.
Is this also a bug (in Clang)?
Ruben
> Regards,
> Kai
>
>
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