jdelony/ik_llama.cpp
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ggml : default GGML_WIN_VER to 0x0A00 (Windows 10) (#1755)

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The default of 0x602 (Windows 8) causes a build failure on any toolchain
where _WIN32_WINNT propagates into vendored cpp-httplib (notably MinGW with
the bundled w64devkit GCC). cpp-httplib's httplib.h has, for some time
now, contained:

    #ifdef _WIN32
    #if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0A00
    #error "cpp-httplib doesn't support Windows 8 or lower. Please use
            Windows 10 or later."
    #endif
    #endif

so the entire llama-server target fails to compile on Windows + MinGW
unless the user passes -DGGML_WIN_VER=0x0A00 manually.

Bumping the default to 0x0A00 (Windows 10) keeps Windows 8 reachable for
anyone who explicitly requests it (-DGGML_WIN_VER=0x602) while letting the
default Windows + MinGW build succeed end-to-end. Windows 8 / 8.1 reached
end of support in January 2023, and Windows 10 is a strict superset of the
Win8 surface used elsewhere (PrefetchVirtualMemory etc.), so this is
strictly additive on the API side.

Verified by building with w64devkit 2.8.0 (gcc 16.1.0) on Windows 11
without any -DGGML_WIN_VER override: all 266 ninja targets link cleanly,
including bin/llama-server.exe, and llama-cli runs Qwen3-4B-Thinking-2507
IQ4_XS at ~6.2 tok/s with q8_0 KV at 4096 context.
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Alex 2026-05-08 06:23:04 -04:00 committed by GitHub
parent 9a26522af2
commit 98950267c6
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1 changed files with 6 additions and 1 deletions
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7
ggml/CMakeLists.txt
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@ -100,7 +100,12 @@ option(GGML_SVE "ggml: enable SVE" OFF)
option(GGML_NCCL "ggml: enable NCCL" ON)
if (WIN32)
set(GGML_WIN_VER "0x602" CACHE STRING "ggml: Windows Version")
# Default to Windows 10 (0x0A00). Windows 8 / 8.1 reached end of support in
# January 2023, and the vendored cpp-httplib (used by the server target)
# rejects anything below 0x0A00 with `#error "cpp-httplib doesn't support
# Windows 8 or lower."`. Override with -DGGML_WIN_VER=0x602 if you really
# need to target Windows 8.
set(GGML_WIN_VER "0x0A00" CACHE STRING "ggml: Windows Version")
endif()
# ggml core