JDK-7171223 : Building ExtensionSubtables.cpp should use -fno-strict-aliasing
- Type: Bug
- Component: client-libs
- Sub-Component: 2d
- Affected Version: 8
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2012-05-23
- Updated: 2012-06-12
- Resolved: 2012-06-12
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| JDK 7 | JDK 8 |
|---|---|
7u6Fixed  |
8 b43Fixed |
Description
At present, the building of ExtensionSubtables.cpp produces a warning: ../../../src/share/native/sun/font/layout/ExtensionSubtables.cpp:57:31: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] due to this code: // read a 32-bit value that might only be 16-bit-aligned in memory #define READ_LONG(code) (le_uint32)((SWAPW(*(le_uint16*)&code) << 16) + SWAPW(*(((le_uint16*)&code) + 1))) where code is a le_uint32. This can be avoided by setting -fno-strict-aliasing, as done in this webrev:
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