From dab5937eee30fbed34a6f5859ed326c4df8b1e94 Mon Sep 17 00:00:00 2001
From: Axis Sivitz <aosivitz@gmail.com>
Date: Tue, 30 Aug 2022 14:57:08 -0400
Subject: [PATCH] Fix compilation on MacOS / GHC 8.10.7 (#156)

Fixes errors along the lines of:
dear-imgui  > [ 2 of 17] Compiling DearImGui.GLFW
dear-imgui  > error: unknown type name 'constexpr'

So the "-std=c++11" option is not being passed to the C++ compiler on
MacOS.
The issue seems related to https://github.com/haskell/cabal/issues/6421
---
 dear-imgui.cabal | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dear-imgui.cabal b/dear-imgui.cabal
index 963693e..1db7fe6 100644
--- a/dear-imgui.cabal
+++ b/dear-imgui.cabal
@@ -185,6 +185,10 @@ library
     , vector
     , text
 
+  if os(darwin)
+    ghc-options:
+      -optcxx-std=c++11
+
   if flag(disable-obsolete)
     cxx-options: -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS