hurd: Fix build from missing fpos_t
#4472
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In 872642a ("gnu: Add proper structs for fpos_t and fpos64_t"), `fpos_t` was changed from an opaque struct to one with a definition on Linux GNU, with the Unix fallback configured as for targets without a GNU `target_env`. However, GNU hurd matches `target_env = "gnu"`, but doesn't have a `fpos` implementation. Fix the build by adjusting the fallback `cfg` to be more specific. Eventually we probably want the same definition on Hurd as on Linux.
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hurd: Fix build from missing `fpos_t`
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In 872642a ("gnu: Add proper structs for fpos_t and fpos64_t"), `fpos_t` was changed from an opaque struct to one with a definition on Linux GNU, with the Unix fallback configured as for targets without a GNU `target_env`. However, GNU hurd matches `target_env = "gnu"`, but doesn't have a `fpos` implementation. Fix the build by adjusting the fallback `cfg` to be more specific. Eventually we probably want the same definition on Hurd as on Linux. (backport <rust-lang#4472>) (cherry picked from commit 72f49c9)
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In 872642a ("gnu: Add proper structs for fpos_t and fpos64_t"), `fpos_t` was changed from an opaque struct to one with a definition on Linux GNU, with the Unix fallback configured as for targets without a GNU `target_env`. However, GNU hurd matches `target_env = "gnu"`, but doesn't have a `fpos` implementation. Fix the build by adjusting the fallback `cfg` to be more specific. Eventually we probably want the same definition on Hurd as on Linux. (backport <rust-lang#4472>) (cherry picked from commit 72f49c9)
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In 872642a ("gnu: Add proper structs for fpos_t and fpos64_t"),
fpos_twas changed from an opaque struct to one with a definition on Linux GNU, with the Unix fallback configured as for targets without a GNUtarget_env. However, GNU hurd matchestarget_env = "gnu", but doesn't have afposimplementation.Fix the build by adjusting the fallback
cfgto be more specific. Eventually we probably want the same definition on Hurd as on Linux.