ESP32 Compilation Warnings

[mnfisher]

A little tip to make life easier.

The output from the esp32 compiler is a 'little' verbose. It is possible to turn off some of the warnings.

In your project directory/main

Edit CMakeLists.txt

At the end of the file add:

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target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-unused-variable)
target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-unused-function)
target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-int-conversion)

This will turn off unused variable and function warnings as well as conversion between integer types. Obviously you should aim to tidy up the code that gives these messages - but it makes spotting the error 'needle' easier in the early project haystack...

Martin

Other warnings can be disabled using similar syntax....

[BenR]

Thanks Martin,

Just getting round to this and I've updated the default file so that the following applies when compiling a new project.

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target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-cpp)
target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-unused-function)
target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-unused-variable)
target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-unused-but-set-variable)
target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-incompatible-pointer-types)
target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-discarded-qualifiers)
target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-int-conversion)

I've also popped this line in there should you want to disable to treat certain warnings as errors, e.g. return variable not set or variable not initialised etc.

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#You can disable all warnings as errors by uncommenting the line below.
#target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-error)

Annoyingly I'd only seen your post once I'd found out and applied the info myself! doh!

[mnfisher]

Thanks Ben,

It makes for a much nicer working environment - I mentioned it again in the notes about lvgl - where there are reams of warnings...

Martin

[BenR]

I've got a copy of LVGL compiling now too so looking forward to having a play with it and seeing what we can do with it going forward.

[mnfisher]

It's good isn't it

Especially with EEZ (or SquareLine) Studio

Martin