gh-114099: Add preprocessor declarations to support compilation on iOS #115023
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freakboy3742 requested review from pganssle, abalkin and ericsnowcurrently as code owners 
mhsmith reviewed Feb 5, 2024
| if (uid == 501) { | ||
| struct passwd mp; | ||
| mp.pw_name = "mobile"; | ||
| mp.pw_passwd = "/smx7MYTQIi2M"; |
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I see it's easy enough to Google, but there should still be a comment explaining what this value is and where it comes from.
Comment on lines +381 to +384
| // iOS/tvOS/watchOS *define* some POSIX methods, | ||
| // but raise a compiler error if they are used. | ||
| #if TARGET_OS_IPHONE | ||
| # undef HAVE_GETGROUPS |
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If it's a compiler error, as opposed to a runtime error, then autoconf should be able to detect the problem. The comment should explain why that wasn't sufficient.
Comment on lines +19 to +21
| // tvOS and watchOS don't provide a number of important POSIX functions. | ||
| #if TARGET_OS_TV || TARGET_OS_WATCH | ||
| # undef HAVE_SIGALTSTACK |
Comment on lines +47 to +50
| // iOS/tvOS/watchOS *define* some POSIX methods, | ||
| // but raise a compiler error if they are used. | ||
| #if TARGET_OS_IPHONE | ||
| # undef HAVE_GETENTROPY |
Comment on lines +66 to +68
| // iOS/tvOS/watchOS *define* clock_settime, but it can't be used | ||
| #if TARGET_OS_IPHONE | ||
| # undef HAVE_CLOCK_SETTIME |
| Prompted by @mhsmith's review, I've dug deeper into how/why configure was incorrectly identifying these functions, and I I've got a cleaner approach for most of this patch. Closing on that basis. |
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Part of the PEP 730 work to add iOS support.
Adds preprocessor declarations to C code to support compilation of the standard library on iOS/tvOS/watchOS.
These changes involve:
configure, but raise a compilation or runtime error if actually used..dylibextension on iOS dynamic librariesPLATFORM_TRIPLETbased on compiler behaviorThe preprocessor symbols used to identify Apple platforms are all provided by the
TargetConditionals.hheader, and form a heirarchy:TARGET_OS_IPHONE- Generated code will run on a variant of iOS (firmware, devices, simulator)TARGET_OS_IOS- Generated code will run on iOSTARGET_OS_MACCATALYST- Generated code will run on macOSTARGET_OS_TV- Generated code will run on tvOSTARGET_OS_WATCH- Generated code will run on watchOSTARGET_OS_SIMULATOR- Generated code will run on an iOS, tvOS, watchOS, or visionOS simulatorOf particular note:
TARGET_OS_IPHONEis any "iPhone like" device - including iOS, tvOS, watchOS, and visionOS.TARGET_OS_IOSis iOS only.