Xcode 4.2 + armv6 + release = bugs?

Question

I'm not really sure where my problem is but the scenario is as follows. I have a universal app set to a deployment target of 3.2 and Base SDK iOS 5.0. The project was created in Xcode 4.2.

I have set my Architectures to include both armv6 and armv7 for "Debug" and "Release"

"Build Active Architecture Only" is set to "No"

While developing my app, I encountered a strange bug where my x and y values would not output correctly on older devices (y would always equal to x).

Once I removed "Required device capabilities" from my "Info.plist" the issue had gone away.

However, it appears that when I actually Archive my app for distribution, the issue is still there! How can this be explained? What else can I check?

Answer 1

The solution was rightly pointed out by @sch. Here are the exact steps:

• Go to "Build Settings"

• Scroll down to "Apple LLVM compiler 3.0 - Language"

• Find "Other C Flags", select "Release" row

• Double-click on the cell in the second column from the right

• Click on "+" and write "-mno-thumb"

Answer 2

See this answer to a previous question. In the comments, someone suggests a solution.

Disabling build for Thumb on armv6 prevents these kinds of errors.