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

[Remi Chateauneu]

Thanks for the answer. Finally I decided to use the printf statement PRId64 but still I am surprised by the default size of 32 bits for a long long.

http://stackoverflow.com/questions/330374/long-long-implementation-in-32-bit-machine

"As per c99 standard, size of long long should be minimum 64 bits."

Isn't it rather that some sprintf format directives are missing because they are Linux-specific ?

Cheers

Remi

Le 13.04.2013 07:54, Tony Theodore a écrit :

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