From ef06b6749e882132dd86d33945d234ff0c16120b Mon Sep 17 00:00:00 2001
From: Marcus Holland-Moritz <github@mhxnet.de>
Date: Tue, 9 Mar 2021 12:07:00 +0100
Subject: [PATCH] Use -O2 for gcc by default (fixes github #14)

---
 CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 36fc0b35..4986b13a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,6 +44,9 @@ endif()
 
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   add_compile_options(-fdiagnostics-color=always)
+  # For gcc, -O3 is *much* worse than -O2
+  set(CMAKE_C_FLAGS_RELEASE "-DNDEBUG -O2 -g")
+  set(CMAKE_CXX_FLAGS_RELEASE "-DNDEBUG -O2 -g")
 elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
   add_compile_options(-fcolor-diagnostics)
 endif()