UPSTREAM PR #17581: cmake: fix macOS build with -DGGML_BACKEND_DL=ON

[loci-dev]

Mirrored from ggml-org/llama.cpp#17581

#17091 introduced an issue where when building with -DGGML_BACKEND_DL=ON on macOS you get this error:

c++: error: invalid argument '-current_version 0.9.4' only allowed with '-dynamiclib'
make[2]: *** [bin/libggml-blas.so] Error 1
make[1]: *** [ggml/src/ggml-blas/CMakeFiles/ggml-blas.dir/all] Error 2

It appears that building a module library with a version is not supported on macOS (CMake ticket), so this PR makes the build skip setting a version for backend module libraries on macOS.

[loci-agentic-ai]

Explore the complete analysis inside the Version Insights

Performance Analysis Summary - PR #354

Project: llama.cpp
PR #354: cmake: fix macOS build with -DGGML_BACKEND_DL=ON

This PR modifies only the CMake build configuration file (ggml/src/CMakeLists.txt) to conditionally skip version property assignment for backend MODULE libraries on macOS when dynamic loading is enabled. The change addresses a CMake limitation where MODULE libraries cannot have VERSION/SOVERSION properties on macOS. No source code modifications were made to any C/C++ files. Performance analysis confirms 0.0% change across all 16 binaries, with power consumption remaining identical between versions. No functions show measurable changes in response time or throughput.