I'm new to c and gcc. I was wondering if anyone can point me to a web page
or book that has a list of the warning messages and their meanings.
Are the warnings the same no matter what compiler you use, or are they
different for each compiler? I have looked all over the gcc web site, but I
can't find anything that explains what the warnings are.
If someone could take the time to help me out and direct me to some info
about this, I'd appriciate it.
Thanks
20  2724 
"News" <ja****@hotmail .com> writes: I'm new to c and gcc. I was wondering if anyone can point me to a web page
or book that has a list of the warning messages and their meanings.
Unlike some compilers' warnings, GCC's are meant to be
self-explanatory. There isn't a place, that I know of, which has
the explanations you are looking for.
If there is a specific warning, or a few, that you would like
explained, c.l.c is a good place to ask. Note that c.l.c is
generally not the right place to ask questions about specific
compilers, but warnings tend to be more about C than about
compilers.
Are the warnings the same no matter what compiler you use, or are they
different for each compiler? I have looked all over the gcc web site, but I
can't find anything that explains what the warnings are.
Every compiler has different warnings.
--
int main(void){char p[]="ABCDEFGHIJKLM NOPQRSTUVWXYZab cdefghijklmnopq rstuvwxyz.\
\n",*q="kl BIcNBFr.NKEzjwC IxNJC";int i=sizeof p/2;char *strchr();int putchar(\
);while(*q){i+= strchr(p,*q++)-p;if(i>=(int)si zeof p)i-=sizeof p-1;putchar(p[i]\
);}return 0;}
Ben Pfaff wrote:
Every compiler has different warnings.
This is true in two different senses: first, the actual text that is
emitted for a given condition may be different. Second, the choice
whether or not to emit a warning for some condition may be different.
In other words, code that causes one compiler to generate a warning may
cause a different compiler to generate a different warning or no warning
at all.
The standard requires certain conditions to generate a diagnostic, so
some conditions must evoke some form of warning from a
standard-compliant compiler.
-Kevin
--
My email address is valid, but changes periodically.
To contact me please use the address from a recent posting.
Ben Pfaff wrote: "News" <ja****@hotmail .com> writes:
I'm new to c and gcc. I was wondering if anyone can point me to a web page
or book that has a list of the warning messages and their meanings.
Unlike some compilers' warnings, GCC's are meant to be
self-explanatory. There isn't a place, that I know of, which has
the explanations you are looking for.
IBM, at least for the mainframes, and even for other systems, has a
tradition of supplying manuals describing all the messages a given
program could generate. Usually it will describe in more detail than
the printed message the cause, and suggested action to take.
There may be other companies that have a similar system, but it is
not so common. Though I believe that early microsoft compilers
may have done it.
-- glen
glen herrmannsfeldt wrote:
<snip> IBM, at least for the mainframes, and even for other systems, has a
tradition of supplying manuals describing all the messages a given
program could generate. Usually it will describe in more detail than
the printed message the cause, and suggested action to take.
I have fond (but admittedly vague) memories of these messages:
I40008291 An error has occurred.
Suggested action: Correct the error and re-submit the job.
;-)
--
Richard Heathfield : bi****@eton.pow ernet.co.uk
"Usenet is a strange place." - Dennis M Ritchie, 29 July 1999.
C FAQ: http://www.eskimo.com/~scs/C-faq/top.html
K&R answers, C books, etc: http://users.powernet.co.uk/eton
Thank you guys for the info. I remember when I was a kid my father would
have a pocket size book full of warnings he could look at if anything came
up. Like they say, I just have to keep coding and making mistakes, then I
will get less warnings, and also get familiar with what they are. Thanks
again
Jakle wrote: Thank you guys for the info. I remember when I was a kid my father would
have a pocket size book full of warnings he could look at if anything came
up. Like they say, I just have to keep coding and making mistakes, then I
will get less warnings, and also get familiar with what they are. Thanks
again
Why not train yourself, by making deliberate mistakes and watching what the
compiler does? For example, try leaving a semicolon off a declaration. Or
try using an undefined variable. Or try missing out a necessary header.
--
Richard Heathfield : bi****@eton.pow ernet.co.uk
"Usenet is a strange place." - Dennis M Ritchie, 29 July 1999.
C FAQ: http://www.eskimo.com/~scs/C-faq/top.html
K&R answers, C books, etc: http://users.powernet.co.uk/eton
Richard Heathfield wrote:
(snip) Why not train yourself, by making deliberate mistakes and watching what the
compiler does? For example, try leaving a semicolon off a declaration. Or
try using an undefined variable. Or try missing out a necessary header.
I remember a compiler I used to use (not a C compiler) that would
attempt to correct errors. (In the internal representation of the
source program only.) So it had messages like:
Semicolon missing, one inserted in line 123.
In the days of batch programming, it was useful to get as much
out of a compiler run as possible. This would allow the
compiler to get farther through the program, and find more
errors, before giving up.
I don't remember if it could detect unclosed comments, an easy
mistake to make in languages with multiline comments.
-- glen
Richard Heathfield wrote: glen herrmannsfeldt wrote:
<snip>
IBM, at least for the mainframes, and even for other systems, has a
tradition of supplying manuals describing all the messages a given
program could generate. Usually it will describe in more detail than
the printed message the cause, and suggested action to take.
I have fond (but admittedly vague) memories of these messages:
I40008291 An error has occurred.
Suggested action: Correct the error and re-submit the job.
Yes, some were like that. It does remind me, though, of the time
my program died with a Machine Check error on a system that charged
real money for CPU time, lines printed, etc. It took some
convincing to get credit for a problem that was not my fault.
Machine Check is a hardware error in the processor, that the
processor can detect. Memory parity might be one, though they
usually checked more than that.
-- glen
"News" <ja****@hotmail .com> wrote in message
news:BR******** **********@news 1.news.adelphia .net... I'm new to c and gcc. I was wondering if anyone can point me to a web page
or book that has a list of the warning messages and their meanings.
The content and meanings of compiler warning (and error) messages
are unique to each compiler.
Are the warnings the same no matter what compiler you use,
No.
or are they
different for each compiler?
Yes.
I have looked all over the gcc web site, but I
can't find anything that explains what the warnings are.
I suggest you read more closely :-). I'm sure the gcc manual
has these descriptions.
Also, if you have some code that's producing a warning you don't
understand, you can post it here and others will probably be able
to spot the trouble. But only post enough code to demonstrate the
problem.
If someone could take the time to help me out and direct me to some info
about this, I'd appriciate it.
Any questions about gcc, I'd direct to the gnu web site and/or newsgroups.
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