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cmake: set CMAKE_POLICY_VERSION_MINIMUM (#49819)

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CMake 4.0.0 breaks compatibility with CMake projects
requiring a CMake < 3.5. However, many projects that
specify a minimum requirement for versions older
than 3.5 are actually compatible with newer CMake
and do not use CMake 3.4 or older features. This
allows those projects to use a newer CMake

Co-authored-by: John W. Parent <45471568+johnwparent@users.noreply.github.com>
Signed-off-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>
This commit is contained in:
Massimiliano Culpo 2025-04-01 14:55:51 +02:00 committed by GitHub
parent 451db85657
commit 0fa829ae77
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1 changed files with 9 additions and 0 deletions
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9
var/spack/repos/builtin/packages/cmake/package.py
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@ -355,6 +355,15 @@ def install(self, spec, prefix):
filter_file("mpc++_r)", "mpc++_r mpiFCC)", f, string=True)
filter_file("mpifc)", "mpifc mpifrt)", f, string=True)
def setup_dependent_build_environment(self, env, dependent_spec):
# CMake 4.0.0 breaks compatibility with CMake projects requiring a CMake
# < 3.5. However, many projects that specify a minimum requirement for
# versions older than 3.5 are actually compatible with newer CMake
# and do not use CMake 3.4 or older features. This allows those
# projects to use a newer CMake
if self.spec.satisfies("@4:"):
env.set("CMAKE_POLICY_VERSION_MINIMUM", "3.5")
def setup_dependent_package(self, module, dependent_spec):
"""Called before cmake packages's install() methods."""