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-rw-r--r--var/spack/repos/builtin/packages/parallelmergetree/package.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/parallelmergetree/package.py b/var/spack/repos/builtin/packages/parallelmergetree/package.py
index 4243e5cae4..d3aae9c468 100644
--- a/var/spack/repos/builtin/packages/parallelmergetree/package.py
+++ b/var/spack/repos/builtin/packages/parallelmergetree/package.py
@@ -37,6 +37,11 @@ class Parallelmergetree(CMakePackage):
variant("shared", default=True, description="Build ParallelMergeTree as shared libs")
+ # The C++ headers of gcc-11 don't provide <algorithm> as side effect of others
+ @when('%gcc@11:')
+ def setup_build_environment(self, env):
+ env.append_flags('CXXFLAGS', '-include algorithm')
+
def cmake_args(self):
args = []