From 6b1a2bc34ac7398bff0b181c789f4628cd9b0d93 Mon Sep 17 00:00:00 2001
From: TakesxiSximada <sximada@gmail.com>
Date: Sun, 8 Oct 2023 20:49:33 +0900
Subject: [PATCH] fix GLEW library build configuration

---
 evogym/simulator/CMakeLists.txt |  4 +++-
 evogym/simulator/FindGLEW.cmake | 23 +++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 evogym/simulator/FindGLEW.cmake

diff --git a/evogym/simulator/CMakeLists.txt b/evogym/simulator/CMakeLists.txt
index 09b6add4..64dc7ee8 100644
--- a/evogym/simulator/CMakeLists.txt
+++ b/evogym/simulator/CMakeLists.txt
@@ -19,6 +19,9 @@ endif()
 
 if(UNIX)
   find_package(OpenGL REQUIRED)
+  set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR})  # use custom FindGLEW.cmake
+  set(GLEW_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/externals/glew/include)
+  set(GLEW_LIBRARY ${PROJECT_SOURCE_DIR}/externals/glew/lib/libGLEW.*)
   find_package(GLEW REQUIRED)
 endif()
 
@@ -46,4 +49,3 @@ add_subdirectory(SimulatorCPP/)
 
 set(CMAKE_CXX_STANDARD_LIBRARIES -ldl)
 # set(CMAKE_VERBOSE_MAKEFILE ON)
-
diff --git a/evogym/simulator/FindGLEW.cmake b/evogym/simulator/FindGLEW.cmake
new file mode 100644
index 00000000..04491133
--- /dev/null
+++ b/evogym/simulator/FindGLEW.cmake
@@ -0,0 +1,23 @@
+# FindGLEW.cmake
+# Search for GLEW library and include directories
+
+find_path(GLEW_INCLUDE_DIR GL/glew.h)
+find_library(GLEW_LIBRARY NAMES GLEW GLEW32)
+
+if (GLEW_INCLUDE_DIR AND GLEW_LIBRARY)
+    set(GLEW_FOUND TRUE)
+else()
+    set(GLEW_FOUND FALSE)
+endif()
+
+if (GLEW_FOUND)
+    if (NOT GLEW_FIND_QUIETLY)
+        message(STATUS "Found GLEW: ${GLEW_LIBRARY}")
+    endif ()
+else()
+    if (GLEW_FIND_REQUIRED)
+        message(FATAL_ERROR "Could NOT find GLEW")
+    endif ()
+endif()
+
+mark_as_advanced(GLEW_INCLUDE_DIR GLEW_LIBRARY)