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LLVM crosscompile x64 for ARM64 #1826

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Merged
merged 3 commits into from
Feb 6, 2024
Merged

LLVM crosscompile x64 for ARM64 #1826

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f754b38
LLVM crosscompile x64 for ARM64
konistehrad Feb 6, 2024
8eaff5e
Fix MacOS host platform test
konistehrad Feb 6, 2024
536681d
Ensure options is persistent in cross compile paths
konistehrad Feb 6, 2024
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34 changes: 34 additions & 0 deletions build/llvm/LLVM.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -438,10 +438,44 @@ function build_llvm(llvm_build)
local options = os.ishost("macosx") and
"-DLLVM_ENABLE_LIBCXX=true" or ""
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AFAICT this configuration is being ignored by the lines below. Could be an issue unless this is not needed anymore.

local is32bits = target_architecture() == "x86"
local targetIsArm64 = target_architecture() == "arm64"

if is32bits then
options = options .. (is32bits and " -DLLVM_BUILD_32_BITS=true" or "")
end

if targetIsArm64 then
if os.host() == "linux" then
local host_arch = unix_host_architecture()
if host_arch ~= "aarch64" then
options = options .. ""
.. ' -DCMAKE_SYSTEM_NAME=Linux'
.. ' -DCMAKE_SYSTEM_PROCESSOR=aarch64'
.. ' -DCMAKE_C_COMPILER=/usr/bin/aarch64-linux-gnu-gcc'
.. ' -DCMAKE_CXX_COMPILER=/usr/bin/aarch64-linux-gnu-g++'
.. ' -DCMAKE_ASM_COMPILER=/usr/bin/aarch64-linux-gnu-as'
.. ' -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER'
.. ' -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY'
.. ' -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY'
.. ' -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ONLY'
.. ' ' .. options
end
end
if os.host() == "macosx" then
local host_arch = unix_host_architecture()
if host_arch ~= "arm64" then
options = options .. ""
.. ' -DCMAKE_SYSTEM_NAME=Darwin'
.. ' -DCMAKE_SYSTEM_PROCESSOR=arm64'
.. ' -DCMAKE_C_COMPILER_TARGET=arm64-apple-darwin21.6.0'
.. ' -DCMAKE_CXX_COMPILER_TARGET=arm64-apple-darwin21.6.0'
.. ' -DCMAKE_ASM_COMPILER_TARGET=arm64-apple-darwin21.6.0'
.. ' ' .. options
end
end
end


cmake("Ninja", conf, llvm_build, options)
ninja('"' .. llvm_build .. '"')
ninja('"' .. llvm_build .. '"', "clang-headers")
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7 changes: 6 additions & 1 deletion build/scripts/Utils.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,11 @@ function download(url, file, try)
return res, code
end

function unix_host_architecture()
result, errorCode = os.outputof("uname -m")
return result
end

--
-- Allows copying directories.
-- It uses the premake patterns (**=recursive match, *=file match)
Expand Down Expand Up @@ -202,4 +207,4 @@ function os.rmfiles(src_dir, filter)
print( "Error: " .. counter .. "/" .. #matches .. " files removed.")
return nil
end
end
end