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build: tidy up __builtin_available feature checks (Apple)

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- sync detection snippet between autotools and cmake
  It wasn't causing issues, but it's useful to avoid unnecessary
  differences while debugging.

- cmake: limit check to `APPLE`.

Ref: b05dc7eb35 #14122
Cherry-picked from #14097
Closes #14127
This commit is contained in:
Viktor Szakats 2024-07-06 03:57:51 +02:00
parent 80fb7c0bef
commit cfd6f43d6c
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4 changed files with 6 additions and 6 deletions
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acinclude.m4
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@ -1649,9 +1649,8 @@ AC_DEFUN([CURL_SUPPORTS_BUILTIN_AVAILABLE], [
AC_MSG_CHECKING([to see if the compiler supports __builtin_available()])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include <stdlib.h>
]],[[
if (__builtin_available(macOS 10.8, iOS 5.0, *)) {}
if(__builtin_available(macOS 10.12, iOS 5.0, *)) {}
]])
],[
AC_MSG_RESULT([yes])