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On Tue, 15 May 2007 22:07:47 +0300 |
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David Harel <hareldvd@××××××××××××.com> wrote: |
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> Greetings, |
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> |
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> |
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> Using kuroo, sometimes I get a notice such as: QA Notice: Package has |
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> poor programming practices which may compile fine but exhibit random |
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> runtime failures. Any idea what trigers such as message? |
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> |
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I found an answer at |
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http://sources.gentoo.org/viewcvs.py/portage/main/trunk/doc/qa.docbook?rev=5734 |
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The relevant section, lightly edited (but unaltered), follows: |
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|| This warning crops up when code starts casting distinct pointer types |
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|| and then dereferencing them. Generally, this is a violation of |
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|| aliasing rules which are part of the C standard. Historically, these |
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|| warnings did not show up as the optimization was not turned on by |
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|| default. With gcc-4.1.x and newer though, the -O2 optimization level |
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|| enables strict aliasing support. |
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|| |
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|| For information, please review these links: |
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|| NetBSD Explination: |
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|| http://mail-index.netbsd.org/tech-kern/2003/08/11/0001.html |
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|| Gentoo Dev Thread: |
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|| http://thread.gmane.org/gmane.linux.gentoo.devel/39495 |
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|| GCC Docs: |
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|| http://gcc.gnu.org/bugs.html#nonbugs_c |
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The programs will probably still work fine; I've seen that error |
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before, but have been using those packages anyway, with no descernable |
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consequences. |
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-- |
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