From 87ec56fd4725007dea2875b796b635f722b62c7c Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Mon, 27 Mar 2017 00:36:31 +0200
Subject: cmake: remove -DNDEBUG from cxxflags automatically

User came complain why ndebug-guard.hpp #error'ed out.
---
 CMakeLists.txt                 |  4 ++++
 cmake/opentrack-platform.cmake | 24 ++++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 51d037c7..276a5cae 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -78,3 +78,7 @@ endforeach()
 
 merge_translations()
 install_sources()
+
+foreach(k C CXX)
+    fix_flags(${k} "DNDEBUG" "")
+endforeach()
diff --git a/cmake/opentrack-platform.cmake b/cmake/opentrack-platform.cmake
index 83784ffc..ce8341b1 100644
--- a/cmake/opentrack-platform.cmake
+++ b/cmake/opentrack-platform.cmake
@@ -95,6 +95,30 @@ endif()
 
 set_property(GLOBAL PROPERTY USE_FOLDERS OFF)
 
+function(fix_flags lang flag replacement)
+    set(part "-")
+    set(pfx "-")
+    if(MSVC)
+        set(part "[-/]")
+        set(pfx "/")
+    endif()
+    if(".${replacement}" STREQUAL ".")
+        set(pfx "")
+    endif()
+    opentrack_escape_string(flag "${flag}")
+    foreach(k _DEBUG _RELEASE _MINSIZEREL _RELWITHDEBINFO "")
+        set(tmp "${CMAKE_${lang}_FLAGS${k}}")
+        if(NOT ".${replacement}" STREQUAL ".")
+            string(APPEND replacement " ")
+        endif()
+        string(REGEX REPLACE "(^| )${part}${flag}(\$| )" " ${pfx}${replacement}" CMAKE_${lang}_FLAGS${k} "${CMAKE_${lang}_FLAGS${k}}")
+        if(NOT ".${tmp}" STREQUAL ".${CMAKE_${lang}_FLAGS${k}}")
+            set(CMAKE_${lang}_FLAGS${k} "${CMAKE_${lang}_FLAGS${k}}" CACHE STRING "" FORCE)
+        else()
+            set(CMAKE_${lang}_FLAGS${k} "${CMAKE_${lang}_FLAGS${k}} ${pfx}${replacement}" CACHE STRING "" FORCE)
+        endif()
+    endforeach()
+endfunction()
 # nix -rdynamic passed from Linux-GNU.cmake
 if(CMAKE_COMPILER_IS_GNUCXX)
     set(__LINUX_COMPILER_GNU 1)
-- 
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