Make `qa` optional, requiring it breaks configure with wxGTK 3.2 on macOS

[barracuda156]

This d2c6c60 commit breaks finding wxGTK 3.2 on macOS when qa lib is not present – and at least by default it is not, AFACT.

Please make it optional, this is not a required component either for wx or for wxMaxima.

% port -v installed wxgtk-3.2 | grep active
  wxgtk-3.2 @3.2.9_0+opengl (active) requested_variants='' platform='darwin 19' archs='x86_64' date='2026-01-17T22:51:38+0800'

% port contents wxgtk-3.2
Port wxgtk-3.2 @3.2.9_0+opengl contains:
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/bin/wx-config
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/bin/wxrc
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/bin/wxrc-3.2
 . . .
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/cmake/wxWidgets-3.2/wxWidgetsConfig.cmake
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/cmake/wxWidgets-3.2/wxWidgetsConfigVersion.cmake
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/cmake/wxWidgets-3.2/wxWidgetsTargets-macports.cmake
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/cmake/wxWidgets-3.2/wxWidgetsTargets.cmake
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu_net-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu_net-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu_net-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu_xml-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu_xml-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_baseu_xml-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_adv-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_adv-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_adv-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_aui-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_aui-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_aui-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_core-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_core-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_core-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_gl-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_gl-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_gl-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_html-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_html-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_html-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_propgrid-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_propgrid-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_propgrid-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_ribbon-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_ribbon-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_ribbon-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_richtext-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_richtext-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_richtext-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_stc-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_stc-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_stc-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_xrc-3.2.0.4.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_xrc-3.2.0.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/libwx_gtk3u_xrc-3.2.dylib
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/wx/config/gtk3-unicode-3.2
  /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxGTK/3.2/lib/wx/include/gtk3-unicode-3.2/wx/setup.h
. . .

[daute]

Tried that now (on Linux) - compiled wxWidgets without qa (./configure --disable-debugreport --prefix=/opt/wx-3.2.9-no-qa), wx-config reports that "qa" is indeed not available (at the end of the output):

Available libraries in this build are:
  xrc webview stc richtext ribbon propgrid aui gl html adv core xml net base

But wxMaxima compiles (and works) without problems, when I use that wxWidgets version. And we have several MacOS CI jobs, which work without problems.
Must be another problem. What's the exact error message, you get?

Best regards, Wolfgang