Description: Switch off optimisation - does not help

--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.11)
-set(CMAKE_C_FLAGS "-std=c99 ${CMAKE_C_FLAGS}")
+set(CMAKE_C_FLAGS "-std=c99 -O0")
 
 # sets HAVE_FMEMOPEN
 add_subdirectory(ext)
