[Octave-bug-tracker] [bug #55741] build with '-Woverloaded-virtual' emits many warnings indicating problems

[Andrew Janke]

Follow-up Comment #5, bug #55741 (project octave):

For some reason, I'm always seeing these warnings when building from default.
It looks like my build is using -Wall by default. Anybody know why this would
be, if -Wall/-Woverloaded-virtual isn't supposed to be the default?

This is the configure I'm using:


../../octave/configure \
  --prefix=/tmp/test-octave \
  --without-x \
  --disable-no-undefined \
  --disable-docs \
  --without-fltk \
  --with-qt=5 \
  --with-hdf5-includedir=$brew_opt/hdf5/include \
  --with-hdf5-libdir=$brew_opt/hdf5/lib \
  --with-blas="-L${brew_opt}/veclibfort/lib -lvecLibFort" \
  | tee config.out


And in the generated Makefile, I see this:


WARN_CFLAGS =  -Wall -W -Wshadow -Wformat -Wpointer-arith -Wmissing-prototypes
-Wstrict-prototypes -Wwrite-strings -Wcast-align -Wcast-qual
WARN_CXXFLAGS =  -Wall -W -Wshadow -Wold-style-cast -Wformat -Wpointer-arith
-Wwrite-strings -Wcast-align -Wcast-qual


This is on macOS 10.14.3.

For some reason, I don't see these warnings when building using a Homebrew
formula, even though it uses a similar configure:


./configure
--prefix=/usr/local/Cellar/octave-default/default
--disable-dependency-tracking
--disable-silent-rules
--enable-link-all-dependencies
--enable-shared
--disable-static
--without-fltk
--with-hdf5-includedir=/usr/local/opt/hdf5/include
--with-hdf5-libdir=/usr/local/opt/hdf5/lib
--with-x=no
--with-blas=-L/usr/local/opt/veclibfort/lib -lvecLibFort
--with-portaudio
--with-sndfile
--with-qt=5



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