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https://issues.apache.org/jira/browse/STDCXX-695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12559342#action_12559342
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Martin Sebor commented on STDCXX-695:
-------------------------------------
Dennis' comments:
-------- Original Message --------
Subject: Re: aCC 6.15 bogus remark #3348
Date: Fri, 11 Jan 2008 18:03:44 -0800 (PST)
From: Dennis Handly <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED], [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
>From: Martin Sebor <[EMAIL PROTECTED]>
>We get over 800 of these remarks in each of our builds. I haven't
>analyzed them all but I did reduce one to a test case showing that
>at least in some instances the warning is wrong.
I've seen cases where it was right but we know what we are doing. :-)
And a few broken cases.
struct S { enum { X }; };
template <class T>
int foo() {
const int X = 1;
return X;
}
int main() { return foo<int>(); }
aCC: HP C/aC++ B3910B A.06.14 [Feb 22 2007]
line 4: remark #3348-D: declaration hides constant "S::X" (declared at line 1)
const int X = 1;
detected during instantiation of "int foo<T>() [with T=int]" at line 8
So this is an enum X that is in struct S, not even in scope here.
We released a new compiler A.06.15 in Sept, with a patch A.06.16 in Dec.
>From: "Xiaohua zhang" <[EMAIL PROTECTED]>
>This bug has been fixed in ToT, you can try next week's weekly tarball to
Martin doesn't get them.
>From: Martin Sebor <[EMAIL PROTECTED]>
>Btw., I just counted the number of remarks we get in stdcxx builds
>with aCC 6.15 and put together a breakdown. You might find the
>results interesting:
http://issues.apache.org/jira/browse/STDCXX-695
Well, interesting in that you haven't figured out that you should just
suppress some of them. ;-)
You do know that there is a command "cadvise report logs ..." that
can produce a nice summary??
#2177-D: 8 variable was declared but never referenced
#2550-D: 28 variable was set but never used
#2826-D: 44 parameter was never referenced
Suppress with +W2177,2550,2826.
#2181-D: 9 argument is incompatible with corresponding format string conversion
This is usually your bug.
#3235-D: 1 nonstandard conversion between pointer to function and pointer to
data
This isn't legal. You must use a type pun, or bigger hammer.
#3348-D: 799 declaration hides constant or variable
As you said, most are bogus.
#4219-D: 250 64 bit migration: type conversion may truncate value
#4298-D: 124 64 bit migration: addition result could be truncated before cast
to bigger sized type
#4299-D: 20 64 bit migration: multiply result could be truncated before cast to
bigger sized type
Probably not helpful. We have removed it from +wlint.
#4244-D: 4 extern storage class used with a function definition
A useless coding standard that no right thinking developer would want.
We are thinking of hiding it.
#4296-D: 695 arithmetic operation on boolean type
#4297-D: 1220 boolean value is used as array index
Another two that might not be useful.
#4282-D: 34 virtual function is called from constructor/destructor
A comment in that these aren't virtual.
#4300-D: 60 Overflow while computing constant in left shift operation
Probably a bug.
#4315-D: 60 while loop without body, did you insert an extra ';'?
An attempt to find typos.
> [HP aCC 6.15] lots of noise due to compiler remarks
> ---------------------------------------------------
>
> Key: STDCXX-695
> URL: https://issues.apache.org/jira/browse/STDCXX-695
> Project: C++ Standard Library
> Issue Type: Bug
> Components: Build
> Affects Versions: 4.2.0
> Environment: HP aCC 6.15
> Reporter: Martin Sebor
>
> The latest HP compiler on IPF issues lots of remarks, making our builds
> exceedingly noisy.
> Here's a breakdown of all the remarks we get in a recent 12S build along with
> the number of each:
> F=hpux-11.31-ia64-acc-6.15-12S-610576-log; \
> R=`sed -n "s/.*: remark \(#[1-9][0-9]*-.\): .*/\1/p" $F | sort | uniq`; \
> for r in $R; do \
> n=`grep ": remark $r: " $F | wc -l`; echo $r: $n; \
> done
> #2177-D: 8 variable was declared but never referenced
> #2181-D: 9 argument is incompatible with corresponding format string
> conversion
> #2550-D: 28 variable was set but never used
> #2826-D: 44 parameter was never referenced
> #2961-D: 1 use of a type with no linkage to declare a variable with linkage
> #3235-D: 1 nonstandard conversion between pointer to function and pointer
> to data
> #3348-D: 799 declaration hides constant or variable
> #4217-D: 3 comparison of enum (represented as an unsigned integer) with zero
> #4219-D: 250 64 bit migration: type conversion may truncate value
> #4234-D: 28 type conversion may lose significant bits
> #4239-D: 2 case type mismatch with switch expression type
> #4244-D: 4 extern storage class used with a function definition
> #4248-D: 4 comparison of unsigned integer with a signed integer
> #4271-D: 780 type conversion may lose sign
> #4273-D: 18 floating-point equality and inequality comparisons may be
> inappropriate due to roundoff common in floating-point computation
> #4278-D: 3 the subexpression in logical expression is a constant
> #4282-D: 34 virtual function is called from constructor/destructor
> #4283-D: 3 access global variable in constructor
> #4296-D: 695 arithmetic operation on boolean type
> #4297-D: 1220 boolean value is used as array index
> #4298-D: 124 64 bit migration: addition result could be truncated before
> cast to bigger sized type
> #4299-D: 20 64 bit migration: multiply result could be truncated before
> cast to bigger sized type
> #4300-D: 60 Overflow while computing constant in left shift operation
> #4315-D: 60 while loop without body, did you insert an extra ';'?
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