Andrew Kelley 5d1aab72d9 std.zig.system: improve native glibc version detection
When the Zig compiler is statically linked, it inspects the
/usr/bin/env ELF file to determine the native glibc version, by checking
the DT_RUNPATH, and then calling readlink() on the libc.so file, because
typically the symlink will have e.g. libc-2.33.so in the name, revealing
the glibc version.

Fortunately, this information is also in readlink() of ld.so, which is
available as the "INTERP" file path. This commit looks for e.g.
`ld-2.33.so` on the symlink data for the dynamic linker.

In theory a more complete solution would also look at `/etc/ld.so.cache`
if necessary, and finally fall back to some hard coded paths, in order
to resolve the location of libc.so, in order to do this readlink() trick
on the resulting path. You can find that flow chart with `man ld.so`.
But I think this logic will be enough to get a correct answer in all real
world cases.

This has been tested on Debian Buster and glibc-based Void Linux.

Fixes #6469
2021-12-13 18:05:02 -07:00
2021-10-01 16:07:42 -07:00
2021-09-30 23:33:03 -07:00
2021-12-11 00:29:31 +01:00
2021-12-13 15:07:53 -08:00
2021-06-25 12:46:23 +03:00
2021-02-19 16:38:04 -07:00

ZIG

A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.

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The ultimate goal of the Zig project is to serve users. As a first-order effect, this means users of the compiler, helping programmers to write better software. Even more important, however, are the end-users.

Zig is intended to be used to help end-users accomplish their goals. Zig should be used to empower end-users, never to exploit them financially, or to limit their freedom to interact with hardware or software in any way.

However, such problems are best solved with social norms, not with software licenses. Any attempt to complicate the software license of Zig would risk compromising the value Zig provides.

Therefore, Zig is available under the MIT (Expat) License, and comes with a humble request: use it to make software better serve the needs of end-users.

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Replacing zig1.wasm with a C program (see stage0/).
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