mg.c: Silence compiler warning

[khwilliamson]

This was generating

warning: type qualifiers ignored on cast result type [-Wignored-qualifiers]

[jkeenan]

This was generating

warning: type qualifiers ignored on cast result type [-Wignored-qualifiers]

Could you provide the OS, perl -V:config_args and C-compiler info for the warnings you are trying to silence?

Spot-checking my recent builds, I don't see any warnings associated with mg.c.

Thank you very much.
Jim Keenan

[khwilliamson]

On 3/17/21 4:08 PM, James E Keenan wrote: This was generating warning: type qualifiers ignored on cast result type [-Wignored-qualifiers] Could you provide the OS, |perl -V:config_args| and C-compiler info for the warnings you are trying to silence? Spot-checking my recent builds, I don't see any warnings associated with |mg.c|.

Summary of my perl5 (revision 5 version 33 subversion 8) configuration: Commit id: bbb5866 Platform: osname=linux osvers=5.4.0-66-generic archname=x86_64-linux-thread-multi uname='linux khw-xps-8930 5.4.0-66-generic #74-ubuntu smp wed jan 27 22:54:38 utc 2021 x86_64 x86_64 x86_64 gnulinux ' config_args='-des -Uversiononly -Dprefix=/home/khw/blead -Dusedevel -Doptimize=-O0 -DDEBUGGING -A'optimize=-ggdb3' -Accflags='-Wno-deprecated' -Dman1dir='none' -Dman3dir='none' -Dcc=g++ -Dusecbacktrace -Dusethreads' hint=recommended useposix=true d_sigaction=define useithreads=define usemultiplicity=define use64bitint=define use64bitall=define uselongdouble=undef usemymalloc=n default_inc_excludes_dot=define Compiler: cc='g++' ccflags ='-D_REENTRANT -D_GNU_SOURCE -Wno-deprecated -fwrapv -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2' optimize='-O0 -ggdb3' cppflags='-D_REENTRANT -D_GNU_SOURCE -Wno-deprecated -fwrapv -DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include' ccversion='' gccversion='9.3.0' gccosandvers='' intsize=4 longsize=8 ptrsize=8 doublesize=8 byteorder=12345678 doublekind=3 d_longlong=define longlongsize=8 d_longdbl=define longdblsize=16 longdblkind=3 ivtype='long' ivsize=8 nvtype='double' nvsize=8 Off_t='off_t' lseeksize=8 alignbytes=8 prototype=define Linker and Libraries: ld='g++' ldflags =' -fstack-protector-strong -L/usr/local/lib' libpth=/usr/include/c++/9 /usr/include/x86_64-linux-gnu/c++/9 /usr/include/c++/9/backward /usr/local/lib /usr/include/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib libs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc libc=libc-2.31.so so=so useshrplib=false libperl=libperl.a gnulibc_version='2.31' Dynamic Linking: dlsrc=dl_dlopen.xs dlext=so d_dlsymun=undef ccdlflags='-Wl,-E' cccdlflags='-fPIC' lddlflags='-shared -O0 -ggdb3 -L/usr/local/lib -fstack-protector-strong' Characteristics of this binary (from libperl): Compile-time options: DEBUGGING HAS_TIMES MULTIPLICITY PERLIO_LAYERS PERL_COPY_ON_WRITE PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP PERL_OP_PARENT PERL_PRESERVE_IVUV PERL_TRACK_MEMPOOL PERL_USE_DEVEL USE_64_BIT_ALL USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_LOCALE_TIME USE_PERLIO USE_PERL_ATOF USE_REENTRANT_API USE_THREAD_SAFE_LOCALE Built under linux Compiled at Mar 15 2021 07:02:52 %ENV: PERL5OPT="-w" PERL_DIFF_TOOL="wgdiff" PERL_POD_PEDANTIC="1" PERL_TEST_HARNESS_ASAP="1" @inc: /home/khw/perl/blead/lib /home/khw/perl/blead/t /home/khw/blead/lib/perl5/site_perl/5.33.8/x86_64-linux-thread-multi /home/khw/blead/lib/perl5/site_perl/5.33.8 /home/khw/blead/lib/perl5/5.33.8/x86_64-linux-thread-multi /home/khw/blead/lib/perl5/5.33.8

[jkeenan]

On 3/17/21 4:08 PM, James E Keenan wrote: This was generating warning: type qualifiers ignored on cast result type [-Wignored-qualifiers] Could you provide the OS, |perl -V:config_args| and C-compiler info for the warnings you are trying to silence? Spot-checking my recent builds, I don't see any warnings associated with |mg.c|.
Summary of my perl5 (revision 5 version 33 subversion 8) configuration: Commit id: bbb5866 Platform: osname=linux osvers=5.4.0-66-generic archname=x86_64-linux-thread-multi uname='linux khw-xps-8930 5.4.0-66-generic #74-ubuntu smp wed jan 27 22:54:38 utc 2021 x86_64 x86_64 x86_64 gnulinux ' config_args='-des -Uversiononly -Dprefix=/home/khw/blead -Dusedevel -Doptimize=-O0 -DDEBUGGING -A'optimize=-ggdb3' -Accflags='-Wno-deprecated' -Dman1dir='none' -Dman3dir='none' -Dcc=g++ -Dusecbacktrace -Dusethreads'

Thanks. I compiled perl on FreeBSD-12 using g++-9.3.0 as the C-compiler. On blead I got:

[perlmonger: make-output] $ ~/bin/perl/report-build-warnings 50e8f677c3.freebsd.g++-9.3.0.maketp.output.txt 
File:  50e8f677c3.freebsd.g++-9.3.0.maketp.output.txt

  Wempty-body                                6
  Wignored-qualifiers                        4
  Wimplicit-fallthrough=                     4
  Wmissing-field-initializers                7
  Wpragmas                                   2

In your branch I got:

$ ~/bin/perl/report-build-warnings ab3cb04e2a.freebsd.g++-9.3.0.maketp.output.txt.gz 
File:  ab3cb04e2a.freebsd.g++-9.3.0.maketp.output.txt.gz

  Wempty-body                                6
  Wignored-qualifiers                        2
  Wimplicit-fallthrough=                     4
  Wmissing-field-initializers                7
  Wpragmas                                   2

So those two warnings in mg.c have been eliminated. I will merge the branch.

Thank you very much.
Jim Keenan