Ios-app support arm64 bit, some problems are studied

From February 2015 onwards, Apple will refuse to support the application of arm64, prepare for a rainy day, the recent time, first research.

First of all, it is clear that arm64 is a new CPU architecture, which has a qualitative improvement in addressing range and numerical capacity, but its support requires that the code be defined in two sets (distinguished by __lp64__ macros). For example, the value of void* can no longer be assigned to an int variable.

Change the project to support arm64:
In Xcode project, Target, Build setttings architectures value changed to Standard Architectrues (ARMV7 arm64)-$ (Archs_standard)

No surprises, some problems, a summary of two issues libcurl and Google Protobuf two third-party libraries


One, Libcurl:
The compilation error is "' __curl_rule_01__ ' decleared as an array with a negative size"



Follow the macro definition to find a find is sizeof (long), and Curl_sizeof_long value is not the same.



This kind of code is definitely not working. Google for a while, find a compiled library libcurl for IOS 7.39.0 http://home.comcast.net/~seiryu/libcurl-ios.html
Put your head papers and GINTAICU in the project.
Open code to see



This kind of code is just thoughtful.




Second, Google Protobuf
Compilation error is
#error Host architecture is not detected as supported by Protobuf



Search for a code, and found that the three-party library has passed the __lp64__ definition of two sets of code.
So I'm just taking this line and adding it directly underneath it.
#define GOOGLE_PROTOBUF_ARCH_X64 1
#define GOOGLE_PROTOBUF_ARCH_64_BIT 1

Other questions, updated at any time after discovery

Ios-app support arm64 bit, some problems are studied