Re: MacOS: error: no matching function for call to 'objc_msgSend'

[Andrew Janke]

On 2/1/20 12:13 AM, Benjamin Abbott wrote:
> Andrew,
>
> I’ve just upgraded to MacOS 10.15.3.
>
> After upgrading Homebew, I now see the error below. It looks to me like this 
> was introduced in changeset 27624. Have you upgraded to Catalina yet?
>
> Ben
>
> libtool: compile:  g++ -std=gnu++11 -DHAVE_CONFIG_H -I. 
> -I/usr/local/opt/freetype/include/freetype2 
> -I/usr/local/Cellar/fontconfig/2.13.1/include 
> -I/usr/local/opt/freetype/include/freetype2 
> -I/usr/local/Cellar/qt/5.14.1/lib/QtNetwork.framework/Headers 
> -I/usr/local/Cellar/qt/5.14.1/lib/QtPrintSupport.framework/Headers 
> -I/usr/local/Cellar/qt/5.14.1/lib/QtHelp.framework/Headers 
> -I/usr/local/Cellar/qt/5.14.1/lib/QtWidgets.framework/Headers 
> -I/usr/local/Cellar/qt/5.14.1/lib/QtGui.framework/Headers 
> -I/usr/local/Cellar/qt/5.14.1/lib/QtSql.framework/Headers 
> -I/usr/local/Cellar/qt/5.14.1/lib/QtXml.framework/Headers 
> -I/usr/local/Cellar/qt/5.14.1/lib/QtCore.framework/Headers 
> -I./libgui/qterminal/libqterminal -Ilibgui/src -I./libgui/src -Ilibgui/graphics 
> -I./libgui/graphics -I./libgui/src/m-editor -Iliboctave -I./liboctave/array 
> -Iliboctave/numeric -I./liboctave/numeric -Iliboctave/operators 
> -I./liboctave/operators -I./liboctave/system -I./liboctave/util -Ilibinterp 
> -I./libinterp -Ilibinterp/parse-tree -I./libinterp/parse-tree 
> -Ilibinterp/corefcn -I./libinterp/corefcn -I./libinterp/octave-value 
> -I./liboctave/wrappers -I/usr/local/opt/readline/include 
> -I/usr/local/opt/sqlite/include -I/usr/local/opt/openssl/include 
> -I/usr/local/opt/gettext/include -I/usr/local/opt/icu4c/include 
> -I/usr/local/opt/qt5/include -I/usr/local/opt/sundials27/include 
> -I/usr/local/opt/zlib/include -fPIC -D_THREAD_SAFE -pthread -Wall -W -Wshadow 
> -Woverloaded-virtual -Wold-style-cast -Wformat -Wpointer-arith -Wwrite-strings 
> -Wcast-align -Wcast-qual -g -O2 -MT libgui/src/libgui_src_la-octave-qobject.lo 
> -MD -MP -MF libgui/src/.deps/libgui_src_la-octave-qobject.Tpo -c 
> libgui/src/octave-qobject.cc  -fno-common -DPIC -o 
> libgui/src/.libs/libgui_src_la-octave-qobject.o
> libgui/src/octave-qobject.cc:91:18: error: no matching function for call to 
> 'objc_msgSend'
>    process_info = objc_msgSend (reinterpret_cast<id> (process_info_class),
>                   ^~~~~~~~~~~~

Hi Ben,

Thanks for testing on Catalina! I don't have a Catalina box yet: I'm not 
upgrading my main machines, and I can't get Catalina to install under 
VMware.

I think this was introduced by change 27575 - the App Nap/pause fix - 
not 27624.

I'm afraid I have no idea how to get this working, and I don't have time 
to do research. The C/Obj-C interface changed with the macOS 10.15 
Catalina SDK, and I don't really understand it.

I suggest we just modify the #ifs to completely disable the App 
Nap/Objective-C stuff on Catalina and later until someone comes along 
who actually knows what they're doing and can fix it for real.

Cheers,
Andrew