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

2023-06-27 17:27:09 +03:00 · 2023-06-27 17:27:09 +03:00 · 3d1fdddf92
parent b4cf7a2822
commit 3d1fdddf92
1 changed files with 8 additions and 0 deletions
--- a/8
+++ b/8
@ -380,6 +380,14 @@ XZ Utils Installation
                required extensions (-msse4.1 -mpclmul) then runtime
                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
                Allow liblzma to use unaligned memory access for 16-bit,
                32-bit, and 64-bit loads and stores. This should be