curl: libressl support

New ground has been broken. New seeds have been sowed, etc etc. This
makes the necessary changes to LibreSSL and cURL to enable the latter
to be built with the former. This has been supported upstream for the
last 3 months, and cURL officially supports LibreSSL
[now](http://daniel.haxx.se/blog/2014/08/05/libressl-vs-boringssl-for-cu
rl/) and [has done](http://curl.haxx.se/changes.html) since 7.38.0. A
recompile of LibreSSL and cURL is necessary if you wish to adopt this
locally, but the dependents of cURL should not need to be recompiled.

Closes #34499.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

1 files changed, 20 insertions, 9 deletions

diff --git a/Library/Formula/libssh2.rb b/Library/Formula/libssh2.rb
index c89a34b48..c088cebb8 100644
--- a/Library/Formula/libssh2.rb
+++ b/Library/Formula/libssh2.rb
@@ -1,4 +1,4 @@
-require 'formula'
+require "formula"
 
 class Libssh2 < Formula
   homepage "http://www.libssh2.org/"
@@ -6,6 +6,8 @@ class Libssh2 < Formula
   sha1 "c27ca83e1ffeeac03be98b6eef54448701e044b0"
   revision 1
 
+  option "with-libressl", "build with LibreSSL instead of OpenSSL"
+
   head do
     url "git://git.libssh2.org/libssh2.git"
 
@@ -22,16 +24,25 @@ class Libssh2 < Formula
     sha1 "6de15a0a9400554c51858092e0276bb9ddd15c42" => :mountain_lion
   end
 
-  depends_on "openssl"
+  depends_on "openssl" => :recommended
+  depends_on "libressl" => :optional
 
   def install
+    args = [ "--prefix=#{prefix}",
+             "--disable-debug",
+             "--disable-dependency-tracking",
+             "--with-openssl",
+             "--with-libz"
+    ]
+
+    if build.with? "libressl"
+      args << "--with-libssl-prefix=#{Formula["libressl"].opt_prefix}"
+    else
+      args << "--with-libssl-prefix=#{Formula["openssl"].opt_prefix}"
+    end
+
     system "./buildconf" if build.head?
-    system "./configure", "--prefix=#{prefix}",
-                          "--disable-debug",
-                          "--disable-dependency-tracking",
-                          "--with-openssl",
-                          "--with-libssl-prefix=#{Formula['openssl'].opt_prefix}",
-                          "--with-libz"
-    system "make install"
+    system "./configure", *args
+    system "make", "install"
   end
 end