libcurl for iOS

Build libcurl for iOS development.
This script will generate static library for armv7 armv7s arm64 i386 and x86_64.
Bitcode support.
OpenSSL and Darwin native ssl support.

Script only, please download libcurl from here: http://curl.haxx.se/download.html
Tested Xcode 8.2.1 on macOS 10.12.4
Tested curl 7.54.0

Usage

curl -O http://curl.haxx.se/download/curl-7.54.0.tar.gz
tar xf curl-7.54.0.tar.gz
cd curl-7.54.0
curl https://raw.githubusercontent.com/sinofool/build-libcurl-ios/master/build_libcurl_dist.sh |bash
......

Find the result libcurl-ios-dist on your desktop.

curl-7.52.1 issue

7.52.1 is the latest release but have an issue to build with darwinssl

https://github.com/curl/curl/issues/1172

8db3afe16c

The fix have commited to curl just one day after release, which should be avaliable for the next patch release.

Workaround for this issue is:

• patch it with the commit (See darwinssl-fix-iOS-build.patch extacted)
• Or, use openssl with: ``` ../build_libcurl_dist.sh openssl

OpenSSL
=================
The script link with native ssl by default (--with-darwinssl).  
To use OpenSSL, use https://github.com/sinofool/build-openssl-ios/ to build OpenSSL for iOS first, in curl source directory run:

curl https://raw.githubusercontent.com/sinofool/build-libcurl-ios/master/build_libcurl_dist.sh openssl |bash

Binary (Not updated yet)
=================
Following binary is curl-7.47.1, I will release 7.52.1 binaries after a longer test.

You can find a prebuild binary (with OpenSSL) here: https://sinofool.net/dl/libcurl-ios-dist.tar.bz2

Double check the binary file before use:

SHA1: 993c9bb75d798a886749e7801d5f54c494dbf6fb libcurl-ios-dist.tar.bz2

GnuPG: (My Key ID: 9BE18853) https://sinofool.net/dl/libcurl-ios-dist.tar.bz2.sig