Xcode4 Workspace with Static library project & application project

I'm working on a project where I'm going to eventually have a library of code that will be used by multiple applications. In reading though the documentation it sounded like creating an XCode4 workspace and 2 p开发者_Python百科rojects (1 library, and 1 application) was the way to go.

I did this and everything appeared to be working just great. However, today I did a bunch of work on my library project and when I run my application to test my library changes it appears to always be including an older compiled version. I'm at a loss, I added my library as a build target in my applications scheme and XCode tells me it's compiling the library, but its always linking to an old version.

Any help is greatly appreciated. Am I missing something in how I set my workspace up? Is there a build step that will force linking to my newly compiled .a? I've even tried removing the dependency, cleaning, re-adding the dependency and building my app and I still get the same results.

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I ran into same problem and my solution was to add

rm -f BUILT_PRODUCTS_DIR/$EXECUTABLE_PATH

to the build -> pre-actions section (edit scheme, expand build and add pre-action). Under Provide build settings from make sure to select your target project. This will ensure correct env vars are configured when your script runs. I'm using XCode 4.5.1.

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Turns out XCode was doing everything right, and I wasn't. Another clean all and recompile and everything is working as expected.

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Additional information about this type of issue here: Static libraries in Xcode 4