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Avoid -march=native for cross-architecture builds #10

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Avoid -march=native for cross-architecture builds #10

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fa9586d
Disable -march=native when cross-compiling to different CPU
volkermauel Aug 2, 2025
d956d11
Prefer DWARF debug info when cross-compiling
volkermauel Aug 2, 2025
b1054e4
Guard x86 intrinsics and strip CodeView when cross-compiling
volkermauel Aug 2, 2025
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21 changes: 20 additions & 1 deletion ggml/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -50,10 +50,29 @@ else()
set(GGML_BLAS_VENDOR_DEFAULT "Generic")
endif()

if (CMAKE_CROSSCOMPILING)
# Disable native builds when cross-compiling or when the target processor
# differs from the host processor. In some environments (e.g. Windows
# arm64 cross-builds using clang), CMake does not set the
# CMAKE_CROSSCOMPILING flag even though the target architecture is
# different. Passing `-march=native` in such cases results in compiler
# errors, so explicitly check the processor as well.
if (CMAKE_CROSSCOMPILING OR NOT (CMAKE_SYSTEM_PROCESSOR STREQUAL CMAKE_HOST_SYSTEM_PROCESSOR))
set(GGML_NATIVE_DEFAULT OFF)
set(GGML_CROSS_DIFFERENT_ARCH ON)
else()
set(GGML_NATIVE_DEFAULT ON)
set(GGML_CROSS_DIFFERENT_ARCH OFF)
endif()

# When cross-compiling with clang for Windows the default CodeView debug
# info can trigger LLVM backend crashes. In that case, prefer DWARF
# debug info instead.
if (GGML_CROSS_DIFFERENT_ARCH AND WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Clang")
add_compile_options(-gdwarf-4)
foreach(lang C CXX)
string(REGEX REPLACE "-Xclang[ ]+-gcodeview" "" CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS}")
set(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS}" CACHE STRING "" FORCE)
endforeach()
endif()

# general
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2 changes: 1 addition & 1 deletion ggml/src/iqk/iqk_quantize.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,7 @@
#include <unordered_map>
#include <string>

#if defined(_MSC_VER)
#if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86))
#pragma warning(disable: 4244 4267) // possible loss of data
#include <intrin.h>
#include <ammintrin.h>
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