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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - JavaScriptCore fails to build on older versions of OS X due to CF_AVAILABLE usage"
href="https://bugs.webkit.org/show_bug.cgi?id=152720">152720</a>
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<th>Summary</th>
<td>JavaScriptCore fails to build on older versions of OS X due to CF_AVAILABLE usage
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
</td>
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<th>Hardware</th>
<td>Unspecified
</td>
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<th>OS</th>
<td>Unspecified
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>JavaScriptCore
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>jeremyhu@apple.com
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<pre>Building webkit-gtk 2.11.2 on the MacPorts Mavericks buildbot failed due CF_AVAILABLE macro usage. These macros should only be used by the OS X system frameworks and not local builds.
/opt/local/var/macports/build/_opt_mports_dports_www_webkit2-gtk/webkit2-gtk/work/webkitgtk-2.11.2/Source/JavaScriptCore/API/JSContextRef.h:144:71: error: expected '=' after '__NSi_10_10'
JS_EXPORT JSStringRef JSGlobalContextCopyName(JSGlobalContextRef ctx) CF_AVAILABLE(10_10, 8_0);
^
/System/Library/Frameworks/CoreFoundation.framework/Headers/CFAvailability.h:95:81: note: expanded from macro 'CF_AVAILABLE'
#define CF_AVAILABLE(_mac, _ios) __attribute__((availability(macosx,__NSi_##_mac)))
^
---
Elsewhere, I see these warnings, which seem to attempt to do that:
/opt/local/var/macports/build/_opt_mports_dports_www_webkit2-gtk/webkit2-gtk/work/webkitgtk-2.11.2/Source/JavaScriptCore/API/WebKitAvailability.h:68:9: warning: 'CF_AVAILABLE' macro redefined
#define CF_AVAILABLE(_mac, _ios)
^
/System/Library/Frameworks/CoreFoundation.framework/Headers/CFAvailability.h:95:9: note: previous definition is here
#define CF_AVAILABLE(_mac, _ios) __attribute__((availability(macosx,__NSi_##_mac)))
^
---
Thus, it looks like WebKitAvailability.h needs to be included in JSContextRef.h before that CF_AVAILABLE usage.
Also, please add an #undef before the #define in WebKitAvailability.h to silence that warning.</pre>
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