c-abi probe: strip Windows host macros; wchar always emitted for freestanding (2026.9.18.3) - #672

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fix/c-abi-probe-strips-windows-host-macros

Commits on Sep 18, 2026

The c-abi probe on a Windows host strips the host's leaked macros; the wchar realisation on a freestanding target no longer assumes the toolchain default is 32 bits (2026.9.18.3)
speak-agent
committed
534b1ee
fix cenv: the freestanding branch must emit -fno-short-wchar unconditionally
speak-agent
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f661260
cenv_probe: cacheRoot before hostStripMacros; presents=none emits -fno-short-wchar
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e2ed1e1