Fix CMake link ordering for tests and SW math libraries

[A-006]

Summary

• Adjust CMake link dependencies for gtest targets so project libraries are linked before ${math_libs}
• Move container/base/device dependencies into AddTest(LIBS ...) for ATen kernel tests
• Add SW build compile option -mieee and include SW FFT/BLAS/LAPACK/ScaLAPACK libraries in math_libs
• Add truncated_underflow(const FPTYPE&) overload to support const inputs by forwarding to the mutable implementation

Notes

The latest commits currently contain unresolved conflict markers in CMakeLists.txt:

• CMakeLists.txt:353
• CMakeLists.txt:818
• CMakeLists.txt:819
• CMakeLists.txt:822

[Copilot]

Pull request overview

This PR updates the CMake-based build/test linkage to be more link-order-friendly (notably for static math libraries and SW builds), and adjusts a utility function intended to avoid floating underflow in SW-specific code paths.

Changes:

• Reorders AddTest(LIBS ...) arguments so project libraries are listed before ${math_libs} for several unit test targets.
• Consolidates SW FFT/BLAS/LAPACK/ScaLAPACK libraries into the math_libs list and adds an SW compile option (-mieee).
• Adds a truncated_underflow(const FPTYPE&) overload (currently implemented via const_cast forwarding).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
source/source_lcao/module_rt/test/CMakeLists.txt	Reorders test link libraries so ${math_libs} is last.
source/source_hsolver/test/CMakeLists.txt	Reorders ${math_libs} to the end for some HSOLVER tests.
source/source_base/truncated_func.h	Adds truncated_underflow(const&) overload forwarding to the mutating implementation.
source/source_base/module_container/ATen/kernels/test/CMakeLists.txt	Moves container/base/device dependencies into AddTest(LIBS ...) (and keeps ${math_libs} last).
CMakeLists.txt	Adds SW -mieee compile option and appends SW math libs into math_libs; removes later per-lib SW link lines.

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[mohanchen]

reopen it if needed