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Docs: Document the configure option --disable-ifunc in INSTALL.

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Jia Tan 2023-06-27 17:27:09 +03:00
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8
INSTALL
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@ -380,6 +380,14 @@ XZ Utils Installation
required extensions (-msse4.1 -mpclmul) then runtime required extensions (-msse4.1 -mpclmul) then runtime
detection isn't used and the generic code is omitted. detection isn't used and the generic code is omitted.
--disable-ifunc
Disable the use of __attribute__((__ifunc__())) for
function dispatching even if support is detected.
The ifunc attribute is incompatible with
-fsanitize=address so it may need to be disabled in
debug builds with extra instrumentation.
--enable-unaligned-access --enable-unaligned-access
Allow liblzma to use unaligned memory access for 16-bit, Allow liblzma to use unaligned memory access for 16-bit,
32-bit, and 64-bit loads and stores. This should be 32-bit, and 64-bit loads and stores. This should be