warning: use of C99 long long integer constant

**Julienne Walker** · Apr 1 '08, 01:05 PM

Re: warning: use of C99 long long integer constant

On Apr 1, 8:39 am, Sebastian Faust <sebastian.fa.. .@googlemail.co m>
wrote:

Hi,
>
Unfortunately, I don't find lots of information on this warning. It
occurs if I compile with -pedantic but I am not sure how I can resolve
this problem. Do you have an idea?
>
The following code produces the warning:
const static unsigned long long data[1] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL}
>
Regards and thanks a lot,
Sebastian

You neglected to post the warning. However, I'm surprised you don't
get an error since you try to initialize an array of 1 with two
values.

-Jul

**Philip Potter** · Apr 1 '08, 01:05 PM

Re: warning: use of C99 long long integer constant

Sebastian Faust wrote:

Hi,
>
Unfortunately, I don't find lots of information on this warning. It
occurs if I compile with -pedantic but I am not sure how I can resolve
this problem. Do you have an idea?
>
The following code produces the warning:
const static unsigned long long data[1] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL}

Aside from the warning (which Ben Bacarisse has explained), note that
you are trying to initialize an array of size 1 with two members.

Please quote the warning in the message as well as the subject.

Philip

**Sebastian Faust** · Apr 1 '08, 01:15 PM

Re: warning: use of C99 long long integer constant

Hi,

Thanks! it works! It was just a copy&paste typo... I copied the
relevant code and then I made this typo...

Thanks again,
Sebastian

**Sebastian Faust** · Apr 1 '08, 01:35 PM

Re: warning: use of C99 long long integer constant

Hi,

Btw. is there a possibility to get rid of this warning with some sort
of typecast?

Regards,
Sebastian

On 1 Apr., 15:03, Philip Potter <p...@doc.ic.ac .ukwrote:

Sebastian Faust wrote:

Hi,

>

Unfortunately, I don't find lots of information on this warning. It
occurs if I compile with -pedantic but I am not sure how I can resolve
this problem. Do you have an idea?

>

The following code produces the warning:
const static unsigned long long data[1] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL}

>
Aside from the warning (which Ben Bacarisse has explained), note that
you are trying to initialize an array of size 1 with two members.
>
Please quote the warning in the message as well as the subject.
>
Philip

**Sebastian Faust** · Apr 1 '08, 02:25 PM

Re: warning: use of C99 long long integer constant

Hey guys,

Could you please tell me if there is any way to get rid of this
warning by applying some typecast?

Cheers,
Sebastian

On 1 Apr., 14:39, Sebastian Faust <sebastian.fa.. .@googlemail.co m>
wrote:

Hi,
>
Unfortunately, I don't find lots of information on this warning. It
occurs if I compile with -pedantic but I am not sure how I can resolve
this problem. Do you have an idea?
>
The following code produces the warning:
const static unsigned long long data[1] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL}
>
Regards and thanks a lot,
Sebastian

**Ben Bacarisse** · Apr 1 '08, 02:25 PM

Re: warning: use of C99 long long integer constant

[Top-posting corrected]
Sebastian Faust <sebastian.faus t@googlemail.co mwrites:

On 1 Apr., 15:03, Philip Potter <p...@doc.ic.ac .ukwrote:

>Sebastian Faust wrote:

Hi,

>>

Unfortunately, I don't find lots of information on this warning. It
occurs if I compile with -pedantic but I am not sure how I can resolve
this problem. Do you have an idea?

>>

The following code produces the warning:
const static unsigned long long data[1] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL}

>>
>Aside from the warning (which Ben Bacarisse has explained), note that
>you are trying to initialize an array of size 1 with two members.
>>
>Please quote the warning in the message as well as the subject.

<snip>

Btw. is there a possibility to get rid of this warning with some sort
of typecast?

Did you read my message? Was that not the problem?

--
Ben.

**Sebastian Faust** · Apr 1 '08, 02:25 PM

Re: warning: use of C99 long long integer constant

On 1 Apr., 16:16, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

[Top-posting corrected]
>
>
>
Sebastian Faust <sebastian.fa.. .@googlemail.co mwrites:

On 1 Apr., 15:03, Philip Potter <p...@doc.ic.ac .ukwrote:

Sebastian Faust wrote:
Hi,

>

Unfortunately, I don't find lots of information on this warning. It
occurs if I compile with -pedantic but I am not sure how I can resolve
this problem. Do you have an idea?

>

The following code produces the warning:
const static unsigned long long data[1] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL}

>

Aside from the warning (which Ben Bacarisse has explained), note that
you are trying to initialize an array of size 1 with two members.

>

Please quote the warning in the message as well as the subject.

<snip>

Btw. is there a possibility to get rid of this warning with some sort
of typecast?

>
Did you read my message? Was that not the problem?
>
--
Ben.

Yes that solved the problem, but I cannot change the option how the
program is compiled. So, is there a way to change the sourcecode?
Although I am not sure if this is actually a good approach...

Cheers,
Sebastian

**Ben Bacarisse** · Apr 1 '08, 02:35 PM

Re: warning: use of C99 long long integer constant

Sebastian Faust <sebastian.faus t@googlemail.co mwrites:

On 1 Apr., 16:16, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

>Sebastian Faust <sebastian.fa.. .@googlemail.co mwrites:

On 1 Apr., 15:03, Philip Potter <p...@doc.ic.ac .ukwrote:
>Sebastian Faust wrote:

<snip>

Unfortunately, I don't find lots of information on this
warning.

<snip>

The following code produces the warning:
const static unsigned long long data[1] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL}

<snip>

>Did you read my message? Was that not the problem?
>>
>--
>Ben.

Best not to quote sigs.

Yes that solved the problem, but I cannot change the option how the
program is compiled. So, is there a way to change the sourcecode?
Although I am not sure if this is actually a good approach...

Ah, then you are in trouble, since you are compiling C99 with a
compiler that is expecting something else.

In such a situation I would not want to turn off the warnings. I'd
want then all and I'd keep checking that none of them was indicating a
more serious problem.

--
Ben.

**Sebastian Faust** · Apr 1 '08, 02:45 PM

Re: warning: use of C99 long long integer constant

On 1 Apr., 16:30, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

Sebastian Faust <sebastian.fa.. .@googlemail.co mwrites:

On 1 Apr., 16:16, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

Sebastian Faust <sebastian.fa.. .@googlemail.co mwrites:
On 1 Apr., 15:03, Philip Potter <p...@doc.ic.ac .ukwrote:
Sebastian Faust wrote:

<snip>

Unfortunately, I don't find lots of information on this
warning.

<snip>

The following code produces the warning:
const static unsigned long long data[1] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL}

<snip>

Did you read my message? Was that not the problem?

>

--
Ben.

>
Best not to quote sigs.
>

Yes that solved the problem, but I cannot change the option how the
program is compiled. So, is there a way to change the sourcecode?
Although I am not sure if this is actually a good approach...

>
Ah, then you are in trouble, since you are compiling C99 with a
compiler that is expecting something else.

Ok! Thanks! Is there a way to solve these particular warnings (use of
C99 long long...) with some change in the code? The reason for this is
that there are hundreds of these warnings and I don't wanna frustrate
the guy who has to compile the code.

Cheers,
Sebastian

**Ben Bacarisse** · Apr 1 '08, 02:55 PM

Re: warning: use of C99 long long integer constant

Sebastian Faust <sebastian.faus t@googlemail.co mwrites:
<snip lots but the code is:>

const static unsigned long long data[] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL
};

On 1 Apr., 16:30, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

>Ah, then you are in trouble, since you are compiling C99 with a
>compiler that is expecting something else.

Ok! Thanks! Is there a way to solve these particular warnings (use of
C99 long long...) with some change in the code? The reason for this is
that there are hundreds of these warnings and I don't wanna frustrate
the guy who has to compile the code.

Not that I know of. Try posting in a gcc group. The real problem is
not the warning or the code but the fact that, for some reason, you
are not allowed to tell the compiler what language it is seeing! That
is not a sane restriction to put on a build system.

The next release of your compiler may choose not to accept long long
and its constants, and your code will just stop working. Your code
compiles at the moment due to the good graces of your compiler -- as
an extension it is allowing long long in C90 mode. This is not a safe
way to proceed.

--
Ben.

**Richard Heathfield** · Apr 1 '08, 03:15 PM

Re: warning: use of C99 long long integer constant

Martin Ambuhl said:

<snip>

The largest
integer you can use in C90 (or C89) is ULONG_MAX which is only
guaranteed to be at least 14294967295

s/1//

--
Richard Heathfield <http://www.cpax.org.uk >
Email: -http://www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999

**Sebastian Faust** · Apr 1 '08, 03:45 PM

Re: warning: use of C99 long long integer constant

On 1 Apr., 16:46, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

Sebastian Faust <sebastian.fa.. .@googlemail.co mwrites:
>
<snip lots but the code is:>
>
const static unsigned long long data[] = {
0x428a2f98d728a e22ULL, 0x7137449123ef6 5cdULL
>
};

On 1 Apr., 16:30, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

Ah, then you are in trouble, since you are compiling C99 with a
compiler that is expecting something else.

Ok! Thanks! Is there a way to solve these particular warnings (use of
C99 long long...) with some change in the code? The reason for this is
that there are hundreds of these warnings and I don't wanna frustrate
the guy who has to compile the code.

>
Not that I know of. Try posting in a gcc group. The real problem is
not the warning or the code but the fact that, for some reason, you
are not allowed to tell the compiler what language it is seeing! That
is not a sane restriction to put on a build system.
>
The next release of your compiler may choose not to accept long long
and its constants, and your code will just stop working. Your code
compiles at the moment due to the good graces of your compiler -- as
an extension it is allowing long long in C90 mode. This is not a safe
way to proceed.

I know that in VC++ although it followed only the C90 standard there
was a way for 64 bit integers with __int64. Is there something like
this for gcc?

**Philip Potter** · Apr 1 '08, 03:45 PM

Re: warning: use of C99 long long integer constant

Sebastian Faust wrote:

On 1 Apr., 16:46, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

>The next release of your compiler may choose not to accept long long
>and its constants, and your code will just stop working. Your code
>compiles at the moment due to the good graces of your compiler -- as
>an extension it is allowing long long in C90 mode. This is not a safe
>way to proceed.

I know that in VC++ although it followed only the C90 standard there
was a way for 64 bit integers with __int64. Is there something like
this for gcc?

This answer may seem unhelpful but the datatype you describe is called
"long long". long long was in gcc before C99 standardized it.

*Why* can't you change the options on your compiler? *Why* do you need a
guaranteed 64-bit integer type?

Philip

**Stephen Sprunk** · Apr 1 '08, 03:55 PM

Re: warning: use of C99 long long integer constant

"Sebastian Faust" <sebastian.faus t@googlemail.co mwrote in message
news:65c0e85e-9ab2-47d0-9510-c10deb133c70@s1 9g2000prg.googl egroups.com...

Could you please tell me if there is any way to get rid of this
warning by applying some typecast?

Typecasting is something done to actors. In C, you "cast" things.

And no, you can't get rid of the warning with a cast because the problem is
that you're trying to compile a C99 program with a C90 compiler. The
solution is to upgrade or properly invoke your compiler in C99 mode.

A cast is almost always the wrong solution to a problem.

S

--
Stephen Sprunk "God does not play dice." --Albert Einstein
CCIE #3723 "God is an inveterate gambler, and He throws the
K5SSS dice at every possible opportunity." --Stephen Hawking

warning: use of C99 long long integer constant

warning: use of C99 long long integer constant

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