src/zfile.c: Use off_t instead of off64_t

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First discovered in while building on musl 1. This is because musl-1.2.4 (9999 right now) will remove/removes the LFS compatibility hacks, like fopen64:

• https://git.musl-libc.org/cgit/musl/commit/?id=246f1c811448f37a44b41cd8df8d0ef9736d95f4
• https://git.musl-libc.org/cgit/musl/commit/?id=25e6fee27f4a293728dd15b659170e7b9c7db9bc

The gist is that bad configure tests (suffering from -Wimplicit-function-declaration) would build and link successfully because musl provided these symbols as aliases, despite not needing them (musl natively supports both LFS & time64).

To head this off, these aliases are now gone, but remain in libc.so for binary compatibility.

The proper fix is to just use the regular functions and not anything _LARGEFILE64_SOURCE As a temporary workaround you can typedef off_t to off64_t 2 to get it working.

Signed-off-by: Brahmajit Das brahmajit.xyz@gmail.com

[liweitianux]

This issue also occurs on DragonFly BSD. I found another way to fix it is to change off64_t to z_off64_t as defined in zconf.h, which has already been included by zfile.c.

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@ggreer any plans on fixing this?