folly: switch to cmake

Fixes #31959.

Closes #31966.

Signed-off-by: FX Coudert <fxcoudert@gmail.com>

Formula/folly.rb

@@ -3,6 +3,7 @@ class Folly < Formula
   homepage "https://github.com/facebook/folly"
   url "https://github.com/facebook/folly/archive/v2018.09.10.00.tar.gz"
   sha256 "86e58bb2642475abb1fd8608ef0d591892670ac7618b290875a8f48c34625f01"
+  revision 1
   head "https://github.com/facebook/folly.git"
 
   bottle do
@@ -13,9 +14,7 @@ class Folly < Formula
     sha256 "53a76921c9ee9a98638b972e5f6179a3acbe6233bc2276f14f3eb6062fdeea50" => :el_capitan
   end
 
-  depends_on "autoconf" => :build
-  depends_on "automake" => :build
-  depends_on "libtool" => :build
+  depends_on "cmake" => :build
   depends_on "pkg-config" => :build
   depends_on "double-conversion"
   depends_on "glog"
@@ -39,12 +38,23 @@ class Folly < Formula
   def install
     ENV.cxx11
 
-    cd "folly" do
-      system "autoreconf", "-fvi"
-      system "./configure", "--prefix=#{prefix}", "--disable-silent-rules",
-                            "--disable-dependency-tracking"
+    mkdir "_build" do
+      args = std_cmake_args + %w[
+        -DFOLLY_USE_JEMALLOC=OFF
+      ]
+
+      # Upstream issue 10 Jun 2018 "Build fails on macOS Sierra"
+      # See https://github.com/facebook/folly/issues/864
+      args << "-DCOMPILER_HAS_F_ALIGNED_NEW=OFF" if MacOS.version == :sierra
+
+      system "cmake", "..", *args, "-DBUILD_SHARED_LIBS=ON"
       system "make"
       system "make", "install"
+
+      system "make", "clean"
+      system "cmake", "..", *args, "-DBUILD_SHARED_LIBS=OFF"
+      system "make"
+      lib.install "libfolly.a", "folly/libfollybenchmark.a"
     end
   end