qwt: add qt to tool_requirements

[ericLemanissier]

fixes #12830

Specify library name and version: qwt/*

---

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the conan-center hook activated.

[ericLemanissier]

@uilianries @jgsogo what does this error mean ? is it an infrastructure issue ?

[jgsogo]

The facts

neon is an option of libpng and it is removed for some configurations:

recipes/libpng/all/conanfile.py

    @property
    def _has_neon_support(self):
        return "arm" in self.settings.arch

    ...

    def config_options(self):
        ...
        if not self._has_neon_support:
            del self.options.neon

(From the error message) it looks like some other package is trying to get the value of that (removed) neon option

The why/wtf

The two configurations that are failing are arch=armv8 so the option neon should be available. For some reason _has_neon_support has been evaluated to False and the option has been removed 😮 I will investigate it

[jgsogo]

Oh! I think I know what's going on, and @SSE4 knows as well 😭 . This is a known bug that we realized in the context of CMake and openssl IIRC (as it is a very common build-require).

Here we have a cross-building scenario and the package libpng appears in both contexts now that qt is being added to the build one. One of those contexts is removing option neon from libpng while the other isn't, but Conan is not capable of dealing with this situation, it uses the same set of options for both contexts. The option pack that contains neon is applied for both and complains in the context where that option has been removed.

I'm not aware of any workaround, besides adding back that option to libpng even if it is not used for some configurations. Maybe @SSE4 has a better memory than me and he remembers any other alternative.

[github-actions]

Hooks produced the following warnings for commit 4bc8ef2

qwt/6.1.6

post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library '.\bin\qwt.dll' links to system library 'uxtheme' but it is not in cpp_info.system_libs.

[conan-center-bot]

Failure in build 7 (4bc8ef27e5b6729bf105197f5dba74ac5c0d17e8):

• qwt/6.1.6@:
  CI failed to create some packages (All logs)

  Logs for packageID 02943e72e9fa7b6899f45484366fa7b8bb07e735:

  [settings]
  arch=x86_64
  build_type=Debug
  compiler=Visual Studio
  compiler.runtime=MDd
  compiler.version=16
  os=Windows
  [options]
  qwt:shared=True
  

  [...]
  moc ..\source_subfolder\src\qwt_dial.h 
  moc ..\source_subfolder\src\qwt_counter.h 
  moc ..\source_subfolder\src\qwt_knob.h 
  moc ..\source_subfolder\src\qwt_slider.h 
  Generating Code...
  moc ..\source_subfolder\src\qwt_thermo.h 
  moc ..\source_subfolder\src\qwt_wheel.h 
  moc_qwt_dyngrid_layout.cpp
  moc_qwt_magnifier.cpp
  moc_qwt_picker.cpp
  moc_qwt_panner.cpp
  moc_qwt_text_label.cpp
  Generating Code...
  Generating Code...
  moc_qwt_abstract_legend.cpp
  moc_qwt_legend.cpp
  moc_qwt_legend_label.cpp
  moc_qwt_plot_renderer.cpp
  moc_qwt_plot.cpp
  moc_qwt_plot_canvas.cpp
  moc_qwt_plot_panner.cpp
  moc_qwt_plot_zoomer.cpp
  moc_qwt_plot_picker.cpp
  moc_qwt_sampling_thread.cpp
  moc_qwt_plot_magnifier.cpp
  moc_qwt_scale_widget.cpp
  moc_qwt_abstract_slider.cpp
  moc_qwt_abstract_scale.cpp
  moc_qwt_analog_clock.cpp
  moc_qwt_compass.cpp
  moc_qwt_counter.cpp
  moc_qwt_dial.cpp
  moc_qwt_slider.cpp
  moc_qwt_knob.cpp
  moc_qwt_plot_glcanvas.cpp
  moc_qwt_thermo.cpp
  moc_qwt_wheel.cpp
  linking ..\lib\qwtd.dll 
  LINK : fatal error LNK1104: cannot open file 'C:\J\w\prod\BuildSingleReference\.conan\data\freetype\2.12.1\_\_\package\c69bad48274e7fc45c887cddc32aa0459f0a81e0\lib\freetyped.lib'
  qwt/6.1.6: 
  
  jom 1.1.3 - empower your cores
  
  jom: C:\J\w\prod\BuildSingleReference@2\.conan\data\qwt\6.1.6\_\_\build\02943e72e9fa7b6899f45484366fa7b8bb07e735\src\Makefile [..\lib\qwtd.dll] Error 1104
  jom: C:\J\w\prod\BuildSingleReference@2\.conan\data\qwt\6.1.6\_\_\build\02943e72e9fa7b6899f45484366fa7b8bb07e735\Makefile [sub-src-make_first-ordered] Error 2
  qwt/6.1.6: ERROR: Package '02943e72e9fa7b6899f45484366fa7b8bb07e735' build failed
  qwt/6.1.6: WARN: Build folder C:\J\w\prod\BuildSingleReference@2\.conan\data\qwt\6.1.6\_\_\build\02943e72e9fa7b6899f45484366fa7b8bb07e735
  ERROR: qwt/6.1.6: Error in build() method, line 110
  	self.run(f"{vcvars} && jom")
  	ConanException: Error 2 while executing set "VSCMD_START_DIR=%CD%" && call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC/Auxiliary/Build/vcvarsall.bat" amd64 && jom
  

• qwt/6.2.0@:
  Didn't run or was cancelled before finishing

---

^{Note: To save resources, CI tries to finish as soon as an error is found. For this reason you might find that not all the references have been launched or not all the configurations for a given reference. Also, take into account that we cannot guarantee the order of execution as it depends on CI workload and workers availability.}

[ghost]

I detected other pull requests that are modifying qwt/all recipe:

• qwt: Use Cmake instead of qmake #12845

This message is automatically generated by https://github.com/ericLemanissier/conan-center-conflicting-prs so don't hesitate to report issues/improvements there.

[ericLemanissier]

in favor of #12845