From 394fa90d0d5e479b347905932180467cc02f5e14 Mon Sep 17 00:00:00 2001
From: Selim Mustafaev <selim@fastmail.fm>
Date: Mon, 16 May 2022 18:22:55 +0300
Subject: [PATCH] Fix for macOS build (building folly in place)

---
 CMakeLists.txt | 23 ++++++++++++++++++++---
 coro/Coro.h    | 15 +++++++++++----
 2 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3b2d572..b680514 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,16 +2,33 @@ cmake_minimum_required(VERSION 3.0)
 project(autocat_gnome)
 
 set(CMAKE_CXX_STANDARD 20)
-#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fcoroutines")
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+if(APPLE)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fcoroutines-ts")
+endif()
+
 #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -g -Og")
 
 if(APPLE)
     set(ENV{PKG_CONFIG_PATH} "$ENV{PKG_CONFIG_PATH}:/usr/local/opt/libsoup@2/lib/pkgconfig:/usr/local/opt/icu4c/lib/pkgconfig")
+    set(OPENSSL_ROOT_DIR /usr/local/opt/openssl)
+    set(OPENSSL_LIBRARIES /usr/local/opt/openssl/lib)
+    set(FOLLY_DEP folly)
+    include(FetchContent)
+    FetchContent_Declare(
+            folly
+            GIT_REPOSITORY https://github.com/facebook/folly.git
+            GIT_TAG        v2022.05.16.00
+    )
+    FetchContent_MakeAvailable(folly)
+else()
+    find_package(folly REQUIRED)
+    set(FOLLY_DEP Folly::folly)
 endif()
 
 find_package(PkgConfig REQUIRED)
 find_package(nlohmann_json REQUIRED)
-find_package(folly REQUIRED)
 
 pkg_check_modules(GTK REQUIRED gtk4)
 pkg_check_modules(GLIB REQUIRED glib-2.0)
@@ -72,7 +89,7 @@ target_link_libraries(autocat_gnome ${GTK_LIBRARIES}
                                     ${LIBADWAITA_LIBRARIES}
                                     ${LIBSIGCPP_LIBRARIES}
                                     nlohmann_json::nlohmann_json
-                                    Folly::folly)
+                                    ${FOLLY_DEP})
 
 set(XML gui/MainWindow.xml)
 
diff --git a/coro/Coro.h b/coro/Coro.h
index 48922c7..cc66e86 100644
--- a/coro/Coro.h
+++ b/coro/Coro.h
@@ -5,19 +5,26 @@
 #ifndef AUTOCAT_GNOME_CORO_H
 #define AUTOCAT_GNOME_CORO_H
 
-#include <coroutine>
 #include <exception>
 #include <iostream>
 
+#if __cpp_lib_coroutine
+    #include <coroutine>
+    namespace corons = std;
+#else
+    #include <experimental/coroutine>
+    namespace corons = std::experimental;
+#endif
+
 template<typename... Args>
-struct std::coroutine_traits<void, Args...> {
+struct corons::coroutine_traits<void, Args...> {
     struct promise_type {
         void get_return_object() noexcept {}
 
-        std::suspend_never initial_suspend() const noexcept {
+        corons::suspend_never initial_suspend() const noexcept {
             return {};
         }
-        std::suspend_never final_suspend() const noexcept {
+        corons::suspend_never final_suspend() const noexcept {
             return {};
         }