mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 18:25:35 -04:00
Matthew Stanley
55 lines
2.2 KiB
CMake
55 lines
2.2 KiB
CMake
# hash_codegen.cmake — generate overlay_codegen_hash.h with a content hash of the
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# recompiler's codegen sources, so the overlay cache path (gcc/<arch-abi>/cg<N>_<hash>/)
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# changes automatically whenever the emitter changes. This closes the gap where a
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# pure-emitter change within the same manual PSX_OVERLAY_CODEGEN_VER produced a
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# different DLL the cache happily reused (a stale-but-cgN load — the v0.3.0 black
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# screen). Both the runtime loader (via overlay_api.h) and compile_overlays.py read
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# the generated PSX_OVERLAY_CODEGEN_HASH, so the two sides never drift.
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#
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# Invoked as: cmake -DOUT=<header> "-DSRCS=<a>;<b>;..." -P hash_codegen.cmake
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# Re-runs whenever a listed source changes (it's an add_custom_command DEPENDS).
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#
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# Or, outside any build, with the canonical list resolved here:
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# cmake -DOUT=<header> -DPSXRECOMP_CODEGEN_HASH_ROOT=<psxrecomp> -P hash_codegen.cmake
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# tools/aot_overlay_pipeline.py `static` does this: a static overlay shard is
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# generated before the runtime is ever built, and compile_overlays' stale-
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# recompiler guard needs this header to exist.
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if(NOT DEFINED SRCS)
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if(NOT DEFINED PSXRECOMP_CODEGEN_HASH_ROOT)
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message(FATAL_ERROR
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"hash_codegen.cmake: pass -DSRCS=<list> or "
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"-DPSXRECOMP_CODEGEN_HASH_ROOT=<psxrecomp root>")
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endif()
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include("${CMAKE_CURRENT_LIST_DIR}/codegen_hash_sources.cmake")
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set(SRCS ${PSXRECOMP_CODEGEN_HASH_SRCS})
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endif()
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set(_cat "")
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foreach(f IN LISTS SRCS)
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if(EXISTS "${f}")
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file(READ "${f}" _c)
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string(APPEND _cat "${_c}")
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endif()
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endforeach()
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string(SHA256 _h "${_cat}")
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string(SUBSTRING "${_h}" 0 8 _h8)
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set(_content "/* AUTO-GENERATED by hash_codegen.cmake — do not edit, do not commit.
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* Content hash of the recompiler codegen sources; folded into the overlay cache
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* path so an emitter change never reuses a stale DLL. */
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#pragma once
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#define PSX_OVERLAY_CODEGEN_HASH 0x${_h8}u
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")
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# Only rewrite when the value actually changes, so dependents don't rebuild on
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# every invocation.
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if(EXISTS "${OUT}")
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file(READ "${OUT}" _old)
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if(_old STREQUAL _content)
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return()
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endif()
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endif()
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file(WRITE "${OUT}" "${_content}")
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message(STATUS "overlay codegen hash: 0x${_h8}")
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