libLTO error with spack on macos Tahoe 26.6.2

[cpraveen]

Hello all

I am facing the issue discussed here

#5473

when installing openblas@0.3.34 using spack

I have

CLT 26.5

gfortran is from brew
gcc version 16.2.0 (Homebrew GCC 16.2.0)

Any tips on how to fix this ?
Thanks

[martin-frbg]

strange, the fix for #5473 should be good for xcode 16 or any later version. Is spack building with make or CMake though - the fix is only for makefile builds, and there's a comment in #5473 that you won't run into this with CMake unless you force building with LTO ?