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Hey all. |
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I'd like to add two warnings to the QA GCC warning message reporter for |
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GCC 4.2. |
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The first is a new warning that is given when GCC makes an optimization |
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assuming that overflow for operations on signed ints is undefined, as |
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per the standard. Apparently a lot of code assumes that it will wrap |
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instead. The reason for this warning is the new -fstrict-overflow flag |
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that is enabled at >= -O2. The warning will only appear with the |
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-Wstrict-overflow flag set, but it is enabled by -Wall so it will be |
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seen pretty often. |
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The other is actually a warning already present in <=4.1. 4.2 now |
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forbids function casts and will actually generate a runtime abort in the |
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code if they're used. This is bad because the code will compile fine |
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but then segfault when executed :(. openssl is a good example (bug |
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#158324). This warning is always reported, even without -Wall. I hope |
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this check will help identify packages that might not be GCC 4.2 ready. |
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|
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-- |
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where to now? if i had to guess |
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dirtyepic gentoo org i'm afraid to say antarctica's next |
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9B81 6C9F E791 83BB 3AB3 5B2D E625 A073 8379 37E8 (0x837937E8) |
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