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-rw-r--r--var/spack/repos/builtin/packages/llvm/package.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/var/spack/repos/builtin/packages/llvm/package.py b/var/spack/repos/builtin/packages/llvm/package.py
index a08a060238..92c31c417f 100644
--- a/var/spack/repos/builtin/packages/llvm/package.py
+++ b/var/spack/repos/builtin/packages/llvm/package.py
@@ -572,7 +572,8 @@ class Llvm(CMakePackage):
conflicts('+lldb', when='~clang')
# LLVM 4 and 5 does not build with GCC 8
- conflicts('%gcc@8:', when='@:5')
+ conflicts('%gcc@8:', when='@:5')
+ conflicts('%gcc@:5.0.999', when='@8:')
# Github issue #4986
patch('llvm_gcc7.patch', when='@4.0.0:4.0.1+lldb %gcc@7.0:')