From c71711ec365de5a228f5703d22a399be55b63991 Mon Sep 17 00:00:00 2001
From: jpekkila <johannes.pekkila@aalto.fi>
Date: Thu, 4 Jul 2019 22:30:26 +0300
Subject: [PATCH] Disabled real-time visualization by default. SDL2 is no
 longer a dependency when building with the default flags.

---
 CMakeLists.txt             | 16 ++++++++++------
 src/standalone/renderer.cc | 10 ++++++++++
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf47f5d..c320a79 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,7 @@ option(DOUBLE_PRECISION "Generates double precision code" OFF)
 option(TIARA_CLUSTER "Special settings for compilation TIARA GPU cluster" OFF)
 option(MULTIGPU_ENABLED "If enabled, uses all the available GPUs" ON)
 option(ALTER_CONF "If enabled, loads astaroth.conf from the build directory" OFF)
+option(BUILD_RT_VISUALIZATION "Builds the module for real-time visualization using SDL2" OFF)
 
 #-------------------Determine build type--------------------------------------#
 
@@ -56,12 +57,15 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
     endif()
 endif()
 
-# SDL 2
-set(SDL2_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/3rdparty/SDL2/include/)
-set(SDL2_LIBRARY_DIR ${CMAKE_SOURCE_DIR}/3rdparty/SDL2/build/)
-set(SDL2_LIBRARY "SDL2")
-include_directories(${SDL2_INCLUDE_DIR})
-link_directories(${SDL2_LIBRARY_DIR})
+if (BUILD_RT_VISUALIZATION)
+    add_definitions(-DAC_BUILD_RT_VISUALIZATION=1)
+    # SDL 2
+    set(SDL2_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/3rdparty/SDL2/include/)
+    set(SDL2_LIBRARY_DIR ${CMAKE_SOURCE_DIR}/3rdparty/SDL2/build/)
+    set(SDL2_LIBRARY "SDL2")
+    include_directories(${SDL2_INCLUDE_DIR})
+    link_directories(${SDL2_LIBRARY_DIR})
+endif()
 
 # CUDA
 find_package(CUDA)
diff --git a/src/standalone/renderer.cc b/src/standalone/renderer.cc
index 9024627..4497001 100644
--- a/src/standalone/renderer.cc
+++ b/src/standalone/renderer.cc
@@ -26,6 +26,7 @@
  */
 #include "run.h"
 
+#if AC_BUILD_RT_VISUALIZATION
 #include <SDL.h>    // Note: using local version in src/3rdparty dir
 #include <math.h>   // ceil
 #include <string.h> // memcpy
@@ -421,3 +422,12 @@ run_renderer(void)
 
     return 0;
 }
+#else // BUILD_RT_VISUALIZATION == 0
+#include "core/errchk.h"
+int
+run_renderer(void)
+{
+    WARNING("Real-time visualization module not built. Set BUILD_RT_VISUALIZATION=ON with cmake.");
+    return 1;
+}
+#endif // BUILD_RT_VISUALIZATION