Update iOS build scripts to work with iOS 7, Xcode 5

[alanjrogers]

While maintaining Xcode 4.6/10.7 compatibility.

Continuation of #260

• Update build scripts to work with iOS 7 SDK.
• Adjust build scripts to still build with Xcode 4.6 on 10.7.
• Make iOS 7 deployment (+arm64 and X86_64) an option (iOS 5.0 the default).
• Move all of the common build logic into one place.

Depends on xcconfigs/xcconfigs#16

[joshaber]

Something's rustled but it's not clear what from the build logs :(

[alanjrogers]

@joshaber WIP bro. update_libgit2_ios is not very worky at the moment.

[joshaber]

I just get so excited when I see a PR, I can't stop myself.

[alanjrogers]

[jspahrsummers]

@alanjrogers Still having the same issue. Anything I can grab?

[alanjrogers]

@jspahrsummers maybe check the versions of libssh2 libtool autoconf automake you have installed?

[jspahrsummers]

$ brew info libssh2 libtool autoconf automake

libssh2: stable 1.4.3
http://www.libssh2.org/
/usr/local/Cellar/libssh2/1.4.3 (177 files, 1,3M) *
  Built from source
From: https://github.com/mxcl/homebrew/commits/master/Library/Formula/libssh2.rb

libtool: stable 2.4.2
http://www.gnu.org/software/libtool/
/usr/local/Cellar/libtool/2.4.2 (66 files, 2,2M) *
  Built from source
From: https://github.com/mxcl/homebrew/commits/master/Library/Formula/libtool.rb
==> Options
--universal
    Build a universal binary
==> Caveats
In order to prevent conflicts with Apple's own libtool we have prepended a "g"
so, you have instead: glibtool and glibtoolize.

autoconf: stable 2.69
http://www.gnu.org/software/autoconf
/usr/local/Cellar/autoconf/2.69 (69 files, 2,0M) *
  Built from source
From: https://github.com/mxcl/homebrew/commits/master/Library/Formula/autoconf.rb

automake: stable 1.14
http://www.gnu.org/software/automake/
/usr/local/Cellar/automake/1.14 (127 files, 2,5M) *
  Built from source
From: https://github.com/mxcl/homebrew/commits/master/Library/Formula/automake.rb
==> Dependencies
Required: autoconf

$ brew update
$ brew install libssh2 libtool autoconf automake
Warning: libssh2-1.4.3 already installed
Warning: libtool-2.4.2 already installed
Warning: autoconf-2.69 already installed
Warning: automake-1.14 already installed

[jspahrsummers]

Here are the updated build logs.

[alanjrogers]

@jspahrsummers Can you give these latest changes a go?

[jspahrsummers]

@alanjrogers /nope

[alanjrogers]

@jspahrsummers That doesn't look like it used the latest changes (It's still calling /usr/bin/xcrun clang).

[jspahrsummers]

@alanjrogers /nope

[alanjrogers]

@jspahrsummers I say we just merge this, it works everywhere but your machine. 🚎

[jspahrsummers]