Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [build-id found in /builddir/build/BUILDROOT/llvm-21.0.0~pre20250413.g39662922e15c53-5.el9.x86_64/usr/lib64/llvm21/lib/LLVMgold.so too small]: [This is the error message for why the build failed. ]

Issue: We use lld for linking LLVM when its being built with PGO. Normally we use ld.bfd as the linker. Both linkers currently use different algorithms for generating a build-id for a shared library or an executable. ld.bfd by default uses the "sha1" algorithm and lld uses "fast". This can be controlled with the --build-id=XY switch.  
Resolution: To always use the sha1 algorithm for build-id generation, one can append to the linker flags in the spec file: 

%global build_ldflags %{?build_ldflags} -Wl,--build-id=sha1