User story
As a VMEC++ developer, I can enable a Clang + Enzyme autodiff backend through an opt-in build flag. With the flag off, the default build is byte-for-byte unchanged.
Scope
VMECPP_ENABLE_ENZYME CMake option, off by default; requires Clang and a ClangEnzyme plugin path.common/enzyme/enzyme.h: autodiff intrinsic declarations and the allocation constraint every differentiable kernel follows.enzyme_smoke_test: differentiates a scalar objective over Eigen::Map buffers and checks forward and reverse modes against the closed form and central differences.
Delivered by
#564 (abseil pin for Clang >= 21), #565 (build option + smoke test).
Closes when #565 merges.
User story
As a VMEC++ developer, I can enable a Clang + Enzyme autodiff backend through an opt-in build flag. With the flag off, the default build is byte-for-byte unchanged.
Scope
VMECPP_ENABLE_ENZYMECMake option, off by default; requires Clang and a ClangEnzyme plugin path.common/enzyme/enzyme.h: autodiff intrinsic declarations and the allocation constraint every differentiable kernel follows.enzyme_smoke_test: differentiates a scalar objective overEigen::Mapbuffers and checks forward and reverse modes against the closed form and central differences.Delivered by
#564 (abseil pin for Clang >= 21), #565 (build option + smoke test).
Closes when #565 merges.