[Octave-bug-tracker] [bug #63643] [octave-forge](image) warnings about "abs" when compiling with clang

[Dmitri A. Sergatskov]

URL:
  <https://savannah.gnu.org/bugs/?63643>

                 Summary: [octave-forge](image) warnings about "abs" when
compiling with clang
                 Project: GNU Octave
               Submitter: dasergatskov
               Submitted: Wed 11 Jan 2023 06:53:01 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Build Failure
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 8.0.90
         Discussion Lock: Any
        Operating System: GNU/Linux
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Wed 11 Jan 2023 06:53:01 PM UTC By: Dmitri A. Sergatskov <dasergatskov>
Lots of warnings compiling bwdist.cc (4 warnings) and 
__custom_gaussian_smoothing__.cc (80 warnings)


bwdist.cc:424:27: warning: using floating point absolute value function 'fabs'
when argument is of integer type [-Wabsolute-value]
  return abs(x)>abs(y) ? (fabs(x) + sqrt2_1 * fabs(y)) :
                          ^
bwdist.cc:424:27: note: use function 'std::abs' instead
  return abs(x)>abs(y) ? (fabs(x) + sqrt2_1 * fabs(y)) :
                          ^~~~
                          std::abs

...

clang++ -std=gnu++14 -I/usr/local/include/octave-8.0.1/octave/..
-I/usr/local/include/octave-8.0.1/octave -I/usr/local/include  -pthread
-fopenmp -O2 -mavx -mavx2 -march=native -mtune=native -flto=thin -g  -Wall -O2
-o bwdist.oct  /tmp/oct-FvWdqw.o   -shared -Wl,-Bsymbolic  -L/usr/local/lib
-shared -Wl,-Bsymbolic  -L/usr/local/lib -shared -Wl,-Bsymbolic   
__custom_gaussian_smoothing__.cc:58:43: warning: using integer absolute value
function 'abs' when argument is of floating point type [-Wabsolute-value]
              const octave_idx_type rur = abs (k*(ct*sqrtv2 - st*sqrtv1)); //
'rur' means 'row-upper-right'
                                          ^
__custom_gaussian_smoothing__.cc:58:43: note: use function 'std::abs' instead
              const octave_idx_type rur = abs (k*(ct*sqrtv2 - st*sqrtv1)); //
'rur' means 'row-upper-right'
                                          ^~~
                                          std::abs

...



Full log is attached.

image 2.14.0; octave 8.0.1; clang 15.0.1 on CentOs Stream 9.

Dmitri.
-- 








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File Attachments:


-------------------------------------------------------
Date: Wed 11 Jan 2023 06:53:01 PM UTC  Name: image_abs_warnings.txt.gz  Size:
1KiB   By: dasergatskov

<http://savannah.gnu.org/bugs/download.php?file_id=54215>

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