Fix FreeBSD

[gnzlbg]

#1440 broke FreeBSD by changing libc FreeBSD targets to require a cfg(freebsdXX) to be defined, but not updating build.rs to define freebsd11 when LIBC_CI is not available. Since LIBC_CI is always defined on CI, this issue went undetected.

This PR fixes that issue in the build.rs and introduces a build task that tests FreeBSD without LIBC_CI on FreeBSD11, although I'm not sure this would have caught the issue in #1466 .

Closes #1466 .

[rust-highfive]

@gnzlbg: no appropriate reviewer found, use r? to override

[pietroalbini]

/AzurePipelines run

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[pietroalbini]

/AzurePipelines run rust-lang.libc

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[gnzlbg]

@carllerche thank you for reporting this issue. Would you be able to try the libc branch used by this PR and let us know whether the issue is resolved ?

You would need to amend the libc dependency in your Cargo.toml with:

libc = { version = "0.2", git = "https://github.com/gnzlbg/libc/", branch = "fix_freebsd" }

[gnzlbg]

/AzurePipelines run

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[pizzamig]

Removing the LIBC_CI detection, the freebsd11 is not the default one anymore.
I guess, the LIBC_CI detection should be there, adding a else branch that forcibly define freebsd11

[gnzlbg]

I'm not sure what you mean by:

Removing the LIBC_CI detection, the freebsd11 is not the default one anymore.
I guess, the LIBC_CI detection should be there, adding a else branch that forcibly define freebsd11

[pizzamig]

I mean, that I misread the patch, sorry.

The patch is explicitly forcing freebsd11 when no LIBC_CI is defined.
It looks good to me.

[gnzlbg]

@bors: r+

[bors]

📌 Commit f081694 has been approved by gnzlbg

[bors]

⌛ Testing commit f081694 with merge 37f8f8d...

[bors]

☀️ Test successful - checks-cirrus-freebsd-11, checks-cirrus-freebsd-12, status-azure
Approved by: gnzlbg
Pushing 37f8f8d to master...