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Add libc++ < 20 fallback for floating-point scale value validation - #159
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libc++ prior to version 20 does not implement std::from_chars for floating point types, which causes builds to fail on systems using older libc++ versions (e.g. FreeBSD 14/15). Add a small fallback using std::strtof for building with libc++ < 20. While libstdc++, or libc++ 20 or later continue to use the existing std::from_chars implementation, this change restores compatibility with older libc++ versions.
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libc++ prior to version 20 does not implement
std::from_charsfor floating point types, which causes builds to fail on systems using older libc++ versions (e.g. FreeBSD 14/15).Add a small fallback using
std::stoffor building with libc++ < 20.While libstdc++, or libc++ 20 or later continue to use the existing
std::from_charsimplementation, this change restores compatibility with older libc++ versions.