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Get rid of LuaJIT linking workarounds
...and replace them with a cautionary warning message if someone uses an old version. The detection is kind of a hack but no choice as upstream is not interested in version numbering.
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558cbd89fb
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af38bae57f
@ -672,9 +672,27 @@ endif()
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# Set some optimizations and tweaks
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include(CheckCSourceCompiles)
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include(CheckSymbolExists)
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if(NOT USE_LUAJIT)
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set(CMAKE_REQUIRED_INCLUDES ${LUA_INCLUDE_DIR})
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set(CMAKE_REQUIRED_INCLUDES ${LUA_INCLUDE_DIR})
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if(USE_LUAJIT)
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set(CMAKE_REQUIRED_LIBRARIES ${LUA_LIBRARY})
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# LuaJIT provides exactly zero ways to determine how recent it is (the version
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# is unchanged since 2017), however it happens that string buffers were added
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# after the changes which we care about so that works as an indicator.
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# (https://github.com/LuaJIT/LuaJIT/commit/4c6b669 March 2021)
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unset(HAVE_RECENT_LJ CACHE)
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check_symbol_exists(luaopen_string_buffer "lualib.h" HAVE_RECENT_LJ)
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if(NOT HAVE_RECENT_LJ)
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string(CONCAT explanation_msg
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"You are using a relatively old version of LuaJIT. We recommend "
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"running a recent version (from git) as older ones are known not "
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"to build/work correctly in all cases.\n"
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"THIS APPLIES ESPECIALLY ON macOS OR Linux/aarch64!")
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message(WARNING ${explanation_msg})
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endif()
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else()
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set(CMAKE_REQUIRED_LIBRARIES "")
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unset(HAVE_ATCCALL CACHE)
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# Note: we need to check the function without having the library
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# available for linking, so check_symbol_exists won't work.
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@ -732,26 +750,6 @@ else()
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set(RELEASE_WARNING_FLAGS "")
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endif()
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if(APPLE AND USE_LUAJIT)
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# required per http://luajit.org/install.html
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SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pagezero_size 10000 -image_base 100000000")
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elseif(UNIX AND USE_LUAJIT)
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check_c_source_compiles("#ifndef __aarch64__\n#error\n#endif\nint main(){}" IS_AARCH64)
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if(IS_AARCH64)
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# Move text segment below LuaJIT's 47-bit limit (see issue #9367)
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if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
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# FreeBSD uses lld, and lld does not support -Ttext-segment, suggesting
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# --image-base instead. Not sure if it's equivalent change for the purpose
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# but at least if fixes build on FreeBSD/aarch64
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# XXX: the condition should also be changed to check for lld regardless of
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# os, bit CMake doesn't have anything like CMAKE_LINKER_IS_LLD yet
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SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--image-base=0x200000000")
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else()
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SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-Ttext-segment=0x200000000")
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endif()
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endif()
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endif()
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if(MINGW)
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set(OTHER_FLAGS "${OTHER_FLAGS} -mthreads -fexceptions")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DWIN32_LEAN_AND_MEAN")
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