[clang] [compiler-rt] [llvm] [AIX] Implement the ifunc attribute. (PR #153049)

[Wael Yehia via llvm-commits]

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@@ -146,26 +146,9 @@ void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back("-bforceimprw");
   }
 
-  // PGO instrumentation generates symbols belonging to special sections, and
-  // the linker needs to place all symbols in a particular section together in
-  // memory; the AIX linker does that under an option.
-  if (Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
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w2yehia wrote:

we want to pass this linker option unconditionally because we want ifunc to be supported by default (rather under an option). We hit a wrinkle in that the linker on AIX 7.2 TL5 SP4 and earlier don't support it, so we're currently debating what to do about that.

https://github.com/llvm/llvm-project/pull/153049