cmake: detect HAVE_GETADDRINFO_THREADSAFE
#11979
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Based on autotools logic. Ref: curl#11964 Closes #xxxxx
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jay
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Skip `check_c_source_runs()` call when cross-building. Regression from 04a3a37 curl#11979 Reported-by: Kartatz on Github Fixes curl#12093 Closes #xxxxx
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Fix `HAVE_H_ERRNO_ASSIGNABLE` to not run, only compile its test snippet, aligning this with autotools. This fixes an error when doing cross-builds and also actually detects this feature. It affected systems not allowlisted into this, e.g. SerenityOS. We used this detection result to enable `HAVE_GETADDRINFO_THREADSAFE`. Follow-up to 04a3a37 #11979 Ref: #12095 (closed in favour of this patch) Ref: #11964 (effort to sync cmake detections with autotools) Reported-by: Kartatz on Github Assisted-by: Kartatz on Github Fixes #12093 Closes #12094
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Based on existing autotools logic.
autotools checks for old versions of the allowlisted target OSes and
disables this feature when seeing them. In CMake we assume we're running
on newer systems and enable regardless of OS version.
autotools always runs all 3 probes for non-fast-tracked systems and
enables this feature if any one of them was successful. To save
configuration time, CMake stops at the first successful check.
OpenBSD is not fast-tracked and then gets blocklisted as a generic BSD
system. I haven't double-checked if this is correct, but looks odd.
Ref: #11964 (effort to sync cmake detections with autotools)
Closes #11979
I might have misread or overlooked autotools logic. Please review.