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Hint GCC >= 12 on aarch64 for bf16/fp16 capability probes #28785

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Merged
tianleiwu merged 2 commits into from
Jun 6, 2026
Merged

Hint GCC >= 12 on aarch64 for bf16/fp16 capability probes #28785

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b25c6d2
fix: require GCC >= 12 on aarch64 for bf16/fp16 capability probes
Rishi-Dave Jun 4, 2026
83e12f9
fix: drop GCC version gate; clarify aarch64 bf16/fp16 probe failure m…
Rishi-Dave Jun 5, 2026
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10 changes: 8 additions & 2 deletions cmake/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -675,11 +675,17 @@ else()
if (NOT APPLE AND NOT CMAKE_SYSTEM_NAME STREQUAL "Emscripten" AND onnxruntime_target_platform STREQUAL "aarch64")
check_cxx_compiler_flag(-march=armv8.2-a+bf16 HAS_ARM64_BFLOAT16)
if(NOT HAS_ARM64_BFLOAT16)
message(FATAL_ERROR "The compiler doesn't support BFLOAT16!!!")
message(FATAL_ERROR "The compiler/assembler does not support the aarch64 +bf16 ISA extension. "
"On aarch64 this typically requires GCC >= 12 paired with a sufficiently recent binutils "
"(the capability is gated by the assembler, not the compiler alone). "
"See https://github.com/microsoft/onnxruntime/issues/22837 for details.")
endif()
check_cxx_compiler_flag(-march=armv8.2-a+fp16 HAS_ARM64_FLOAT16)
if(NOT HAS_ARM64_FLOAT16)
message(FATAL_ERROR "The compiler doesn't support FLOAT16!!!")
message(FATAL_ERROR "The compiler/assembler does not support the aarch64 +fp16 ISA extension. "
"On aarch64 this typically requires GCC >= 12 paired with a sufficiently recent binutils "
"(the capability is gated by the assembler, not the compiler alone). "
"See https://github.com/microsoft/onnxruntime/issues/22837 for details.")
endif()
endif()

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