Xcode 4.6 zXing compile error after Xcode update (4H127)

Question

Different projects using ZXing have error after last Xcode update:

Error messages are:

1. private field 'cached_y_' is not used
2. Private field 'bits_' is not used
3. Private field 'cached_row_num_' is not used
4. Private field 'dataHeight_' is not used

Any compiler flag I have to set up?

Answer 1

Just add this flag

-Wno-unused-private-field

under ZXingWidget target -> Build Settings -> Other Warning Flags. Click the + button and paste the flag, clean and build again.

(No need to remove any other flag, just ignore unused private field warning)

Answer 2

Here is a workaround to get it to compile. You have remove couple compile warning flags:

Select the xzing project, build settings, look for "Other Warning Flags" and remove -Werror and -Wno-unused-parameter

Answer 3

They have the project set up to treat warnings as errors. Turn off that setting and it should compile, so you can at least run the sample code.

Also tell them so they can fix the warnings.

Answer 4

Looks like this is a temporary fix http://code.google.com/p/zxing/issues/detail?id=1494 I hope for a much nicer solution soon.