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copied!<p>According to <a href="http://developer.apple.com/documentation/developertools/Conceptual/XcodeBuildSystem/300-Build_Settings/bs_build_settings.html#//apple_ref/doc/uid/TP40002691-SW5" rel="noreferrer">Apple's Docs</a>, you are able to provide a default for any build setting using an <a href="http://developer.apple.com/qa/qa2001/qa1067.html" rel="noreferrer">environment variable</a>. </p> <p>In this case, you'd want to set <code>HEADER_SEARCH_PATHS</code>. For some reason I don't understand, this doesn't work. It works fine for other build settings (for example, OTHER_CFLAGS), but not for <code>HEADER_SEARCH_PATHS</code>. You can see what the variable name for any setting is by opening the research assistant in the build settings window (book button on the bottom left.)</p> <p>One var that does work is <code>USER_HEADER_SEARCH_PATHS</code>, which is just like what you want, but only works for paths in double quotes (not in angle brackets.)</p> <p>So</p> <pre><code>#include "bar.h" </code></pre> <p>would work, but</p> <pre><code>#include <bar.h> </code></pre> <p>wouldn't.</p> <p>The build settings plist referenced from the above article on environment variables should end up looking something like this:</p> <pre><code><?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>USER_HEADER_SEARCH_PATHS</key> <string>~/test</string> </dict> </plist> </code></pre> <p>Hope that helps.</p>

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