Unable to build ff_meters with latest version of Juce

[mediawizrd]

I get errors on the following header files when I try to build ff_meters using the latest version of the Juce library:

#include <juce_audio_basics/juce_audio_basics.h>
#include <juce_gui_basics/juce_gui_basics.h>
#include <juce_events/juce_events.h>

[ffAudio]

Thanks for using ff_meters.

Do you mind sharing a little more detail?

• what's the error message?
• which latest juce: develop branch, master branch or juce6?
• are the module paths valid?

I must admit, that currently I don't have an active project using the meters, but I'm still happy to fix it, if we can get to the bottom of it.

[ffAudio]

I tried and didn't have a problem. If it was related to issue #13 this should be fixed now. Can you please try again? (you will need to resave with Projucer or use whatever method to update your project files)

[mediawizrd]

Hi Daniel I am attaching my build log.  These sorts of errors seem to occur every time I try to include the  ffAudio/ff_meters module in my build.  I am having trouble building the code with both VS2017 and VS2019, when I use the latest (production) release of Juce (Version 5.4.7).. Russ B On 6/21/2020 2:58:38 PM, Daniel Walz <notifications@github.com> wrote: I tried and didn't have a problem. If it was related to issue #13 [#13] this should be fixed now. Can you please try again? (you will need to resave with Projucer or use whatever method to update your project files) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub [#12 (comment)], or unsubscribe [https://github.com/notifications/unsubscribe-auth/AQAPFESIW7JFQURKLP6UDEDRXZ7A3ANCNFSM4ODBYC4Q].

[ffAudio]

Yes, a buildlog would help massively. Unfortunately your attachment didn't go through, I guess github doesn't support attachments. Just copy it in the post...

Thanks!

[mediawizrd]

I am pasting the build log errors in below.   include_ff_meters_LevelMeter.cpp c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(107): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MonoInputChannelCls.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(108): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MonoInputChannelCls.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(109): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MonoInputChannelCls.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(110): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MonoInputChannelCls.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(111): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MonoInputChannelCls.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_lookandfeelmethods.h(412): warning C4456: declaration of 'numChannels' hides previous local declaration (compiling source file ..\..\Source\MonoInputChannelCls.cpp)   c:\dev\x-platform\modules\ff_meters\ff_meters_lookandfeelmethods.h(334): note: see declaration of 'numChannels' (compiling source file ..\..\Source\MonoInputChannelCls.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(107): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\Main.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(108): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\Main.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(109): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\Main.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(110): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\Main.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(111): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\Main.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(107): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MainComponent.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(108): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MainComponent.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(109): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MainComponent.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(110): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MainComponent.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(111): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\Source\MainComponent.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_lookandfeelmethods.h(412): warning C4456: declaration of 'numChannels' hides previous local declaration (compiling source file ..\..\Source\Main.cpp)   c:\dev\x-platform\modules\ff_meters\ff_meters_lookandfeelmethods.h(334): note: see declaration of 'numChannels' (compiling source file ..\..\Source\Main.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_lookandfeelmethods.h(412): warning C4456: declaration of 'numChannels' hides previous local declaration (compiling source file ..\..\Source\MainComponent.cpp)   c:\dev\x-platform\modules\ff_meters\ff_meters_lookandfeelmethods.h(334): note: see declaration of 'numChannels' (compiling source file ..\..\Source\MainComponent.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(107): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(108): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(109): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(110): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_soundfieldlookandfeelmethods.h(111): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_lookandfeelmethods.h(412): warning C4456: declaration of 'numChannels' hides previous local declaration (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp)   c:\dev\x-platform\modules\ff_meters\ff_meters_lookandfeelmethods.h(334): note: see declaration of 'numChannels' (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_levelmeter.cpp(44): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp) c:\dev\x-platform\modules\ff_meters\ff_meters_levelmeter.cpp(51): error C2429: attribute 'maybe_unused' requires compiler flag '/std:c++17' (compiling source file ..\..\JuceLibraryCode\include_ff_meters_LevelMeter.cpp) On 6/22/2020 12:05:06 PM, Daniel Walz <notifications@github.com> wrote: Yes, a buildlog would help massively. Unfortunately your attachment didn't go through, I guess github doesn't support attachments. Just copy it in the post... Thanks! — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub [#12 (comment)], or unsubscribe [https://github.com/notifications/unsubscribe-auth/AQAPFER2LVPUSPXN4I6DHZTRX6TOBANCNFSM4ODBYC4Q].

[ffAudio]

Oh, I see. I wasn't aware that maybe_unused is a C++17 feature.
You can easily fix that by switching your project to C++17, but I will move back to use ignoreUnused() so you don't have to switch just for that feature...

Thanks for the report