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FindPCAP: mystery solved! 

Explain why __builtin_available() doesn't help with the problem in

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Guy Harris 2023-11-01 15:55:57 -07:00
parent af91d78a54
commit 27e8c8ebde
1 changed files with 8 additions and 4 deletions
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cmake/modules/FindPCAP.cmake
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@ -238,10 +238,14 @@ if(PCAP_FOUND)
# isn't found in the system libpcap.
#
# Protecting calls to those APIs with __builtin_available()
# does not appear to prevent this, for some unknown reason,
# and it doesn't even allow the program to compile with
# versions of Xcode prior to Xcode 15, as the pcap.h file
# doesn't specify minimum OS versions for those functions.
# does not prevent this, because the libpcap header files
# in the Sonoma SDK mark them as being first available
# in macOS 10.13, just like all the other routines introduced
# in libpcap 1.9, even though they're only available if libpcap
# is built with remote capture enabled or stub routines are
# provided. (A fix to enable this has been checked into the
# libpcap repository, and may end up in a later version of
# the SDK.)
#
# Given all that, and given that the versions of the
# remote-capture APIs in Sonoma are stubs that always fail,