MSYS2: add a comment about realpath
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		@@ -130,6 +130,8 @@ setup() {
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		--bindir . --libdir . --cross-file="$toolchain" "$builddir" "$sourcedir"
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							--bindir . --libdir . --cross-file="$toolchain" "$builddir" "$sourcedir"
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}
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					}
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					# Note: you may need GNU coreutils realpath for non-existent build directories
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					# (macOS and busybox will probably not work).
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sourcedir=$(realpath "${2:-$(dirname "$0")}")
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					sourcedir=$(realpath "${2:-$(dirname "$0")}")
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builddir=$(realpath "${1:-builddir}")
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					builddir=$(realpath "${1:-builddir}")
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toolchain=$builddir/msys2-cross-toolchain.meson
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					toolchain=$builddir/msys2-cross-toolchain.meson
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