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Quoth fire-eyes, on Wednesday, the 30th of March: |
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> I have noticed a bit of noise here on the topic of 2.6 versions of |
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> linux-headers. |
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Yes. |
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As the topic has cropped up I want to ask a question that has bothered me |
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for quite some time now. |
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In a LKML post [1] about the symlinking of /usr/include/linux to |
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/usr/src/linux/include/ which has been done for quite some time in older |
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Linux distributions, Linus calls doing this "instanity" and states that the |
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kernel headers used to compile glibc and friends should always be taken |
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from the glibc distribution (which includes a patched set of kernel |
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headers) and one should not use the headers from the kernel.org tarball. |
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But this is exactly what Gentoos linux-headers package does: get the kernel |
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tarball and install the required files. The result is in effect not really |
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different from the old symlinking method. |
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Now am I misreading Linus' recommendation? |
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When he sais: |
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> Basically, that symlink should not be a symlink. It's a symlink for |
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> historical reasons, none of them very good any more (and haven't been for |
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> a long time), and it's a disaster unless you want to be a C library |
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> developer. Which not very many people want to be. |
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> The fact is, that the header files should match the library you link |
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> against, not the kernel you run on. |
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and later: |
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> [...] you should not use the kernel headers: You should use the headers |
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> that glibc came with. It is probably a Red Hat bug that those headers |
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> were a symbolic link. |
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Does that mean: |
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a) glibc comes with patched kernel headers that should always be used when |
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compiling other applications/libs |
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or |
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b) it doesn't matter what kernel headers you use to build your glibc with |
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as long as any apps that use glibc use the very same headers at compile |
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time. |
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Thanks in advance for clarifying(sp?) this. |
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|
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Peter G. |
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[1] http://linuxmafia.com/faq/Kernel/usr-src-linux-symlink.html |
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-- |
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"I do not think the way you think I think." |
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-- Kai, last of the Brunnen G |
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-- |
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