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llvm: llvm@13+libcxx needs a very recent C++ compiler (#26584)

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libc++-13 does not support %gcc@:10, see:
https://bugs.llvm.org/show_bug.cgi?id=51359#c1

https://libcxx.llvm.org/#platform-and-compiler-support says:
- GCC    11     - latest stable release per GCC’s release page
- Clang: 11, 12 - latest two stable releases per LLVM’s release page
- AppleClang 12 - latest stable release per Xcode’s release page
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Bernhard Kaindl 2021-10-08 02:25:51 +02:00 committed by GitHub
parent 28529f9eaf
commit 449a5832c8
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var/spack/repos/builtin/packages/llvm/package.py
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@ -197,6 +197,15 @@ class Llvm(CMakePackage, CudaPackage):
conflicts("%gcc@8:", when="@:5")
conflicts("%gcc@:5.0", when="@8:")
# libc++ of LLVM13, see https://libcxx.llvm.org/#platform-and-compiler-support
# @13 does not support %gcc@:10 https://bugs.llvm.org/show_bug.cgi?id=51359#c1
# GCC 11 - latest stable release per GCC release page
# Clang: 11, 12 - latest two stable releases per LLVM release page
# AppleClang 12 - latest stable release per Xcode release page
conflicts("%gcc@:10", when="@13:+libcxx")
conflicts("%clang@:10", when="@13:+libcxx")
conflicts("%apple_clang@:11", when="@13:+libcxx")
# OMP TSAN exists in > 5.x
conflicts("+omp_tsan", when="@:5")