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-rw-r--r--var/spack/repos/builtin/packages/root/package.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/root/package.py b/var/spack/repos/builtin/packages/root/package.py
index ff87307f30..142f68243d 100644
--- a/var/spack/repos/builtin/packages/root/package.py
+++ b/var/spack/repos/builtin/packages/root/package.py
@@ -601,6 +601,9 @@ class Root(CMakePackage):
env.set("ROOTSYS", self.prefix)
env.set("ROOT_VERSION", "v{0}".format(self.version.up_to(1)))
env.prepend_path("PYTHONPATH", self.prefix.lib.root)
+ # the following vars are copied from thisroot.sh; silence a cppyy warning
+ env.set("CLING_STANDARD_PCH", "none")
+ env.set("CPPYY_API_PATH", "none")
def setup_dependent_build_environment(self, env, dependent_spec):
env.set("ROOTSYS", self.prefix)