Re: [Mingw-cross-env-list] printf("%lld %jd" unknown conversion type character 'l' and 'j' in format

[Tony Theodore]

On 12/04/2013, at 10:32 AM, Remi Chateauneu <address@hidden> wrote:

> Hi,
> 
> Still trying to compile and link fldigi with MXE, and I get the error with 
> the following line:
> 
> printf("%lld %jd", freq, (intmax_t)rtime );
> 
> spot/pskrep.cxx:735:2: warning: unknown conversion type character 'l' in 
> format [-Wformat]
> spot/pskrep.cxx:735:2: warning: unknown conversion type character 'j' in 
> format [-Wformat]
> 
> Some details about a similar problem here:
> 
> http://sourceforge.net/mailarchive/message.php?msg_id=23004498
> 
>>> As you can see, it interprets the unsigned long long as a 32 integer,
>>> and not 64 bit one...
>> 
>> Which is exactly as you should expect, when you use the standard Microsoft
>> implementations of printf, scanf and friends, (as MinGW does).
> 
> This leaves me a bit surprised because "long long" has to be 64 bits 
> everywhere I think.

It's 32 bit by default:

$ printf "#include <stdio.h>\nint main(void) {unsigned long long 
i;printf(\"%%lld\", i);return 0;}" | i686-pc-mingw32-gcc -x c - -Wformat
<stdin>: In function 'main':
<stdin>:2:1: warning: unknown conversion type character 'l' in format 
[-Wformat=]
<stdin>:2:1: warning: too many arguments for format [-Wformat-extra-args]


but you can use the "-ansi" or "-posix" flags to trigger the 64 bit alternative:

$ printf "#include <stdio.h>\nint main(void) {unsigned long long 
i;printf(\"%%lld\", i);return 0;}" | i686-pc-mingw32-gcc -x c - -Wformat -ansi

Cheers,

Tony