From fe327aaade86556e861cc2e28cb434e586c01e64 Mon Sep 17 00:00:00 2001
From: Carlo Cabrera <30379873+carlocab@users.noreply.github.com>
Date: Sat, 22 May 2021 17:54:06 +0100
Subject: [PATCH 1/3] folly: build on Mojave

---
 Formula/folly.rb | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/Formula/folly.rb b/Formula/folly.rb
index 127202f5a6f39..9d2f4db776798 100644
--- a/Formula/folly.rb
+++ b/Formula/folly.rb
@@ -21,14 +21,29 @@ class Folly < Formula
   depends_on "glog"
   depends_on "libevent"
   depends_on "lz4"
-  # https://github.com/facebook/folly/issues/1545
-  depends_on macos: :catalina
   depends_on "openssl@1.1"
   depends_on "snappy"
   depends_on "xz"
   depends_on "zstd"
 
+  on_macos do
+    depends_on "llvm" if DevelopmentTools.clang_build_version <= 1100
+  end
+
+  fails_with :clang do
+    build 1100
+    # https://github.com/facebook/folly/issues/1545
+    cause <<-EOS
+      Undefined symbols for architecture x86_64:
+        "std::__1::__fs::filesystem::path::lexically_normal() const"
+    EOS
+  end
+
   def install
+    on_macos do
+      ENV.llvm_clang if DevelopmentTools.clang_build_version <= 1100
+    end
+
     mkdir "_build" do
       args = std_cmake_args + %w[
         -DFOLLY_USE_JEMALLOC=OFF
@@ -46,6 +61,9 @@ def install
   end
 
   test do
+    # Force use of Clang rather than LLVM Clang
+    on_macos { ENV.clang }
+
     (testpath/"test.cc").write <<~EOS
       #include <folly/FBVector.h>
       int main() {

From 4067e2e19d6283cf21c8e82ba0442de49a1f953c Mon Sep 17 00:00:00 2001
From: Carlo Cabrera <30379873+carlocab@users.noreply.github.com>
Date: Sat, 22 May 2021 20:20:58 +0100
Subject: [PATCH 2/3] fizz: build on Mojave

This was previously blocked by `folly` not building on Mojave, but no
longer.
---
 Formula/fizz.rb | 2 --
 1 file changed, 2 deletions(-)

diff --git a/Formula/fizz.rb b/Formula/fizz.rb
index 8f21e95c484b5..2accf81271581 100644
--- a/Formula/fizz.rb
+++ b/Formula/fizz.rb
@@ -22,8 +22,6 @@ class Fizz < Formula
   depends_on "libevent"
   depends_on "libsodium"
   depends_on "lz4"
-  # https://github.com/facebook/folly/issues/1545
-  depends_on macos: :catalina
   depends_on "openssl@1.1"
   depends_on "snappy"
   depends_on "zstd"

From 6f3e1dea1d0cb12d4daeb7f562ce99a9f7b28056 Mon Sep 17 00:00:00 2001
From: Carlo Cabrera <30379873+carlocab@users.noreply.github.com>
Date: Sat, 22 May 2021 22:55:24 +0100
Subject: [PATCH 3/3] wangle: build on Mojave

This was previously blocked by `folly` not building on Mojave, but no
longer.
---
 Formula/wangle.rb | 2 --
 1 file changed, 2 deletions(-)

diff --git a/Formula/wangle.rb b/Formula/wangle.rb
index 98a105275762e..cd90451a1c171 100644
--- a/Formula/wangle.rb
+++ b/Formula/wangle.rb
@@ -23,8 +23,6 @@ class Wangle < Formula
   depends_on "libevent"
   depends_on "libsodium"
   depends_on "lz4"
-  # https://github.com/facebook/folly/issues/1545
-  depends_on macos: :catalina
   depends_on "openssl@1.1"
   depends_on "snappy"
   depends_on "zstd"