From 8bf738e673c5f3506f30b68ec37c9bbe7b55f471 Mon Sep 17 00:00:00 2001
From: apn <apn@opencascade.com>
Date: Mon, 19 Feb 2018 12:24:55 +0300
Subject: [PATCH] 0029514: Configuration, CMake - OpenGL ES should be available
 for Linux

Allow optionally building OCCT with GLESv2 and EGL on Linux
---
 CMakeLists.txt           | 2 +-
 adm/cmake/occt_csf.cmake | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index feeaa9a847..4987c1a77e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -583,7 +583,7 @@ else()
 endif()
 
 # OpenGL ES 2.0
-if (WIN32 AND CAN_USE_GLES2)
+if (CAN_USE_GLES2)
   if ("${CMAKE_SYSTEM_NAME}" STREQUAL "WindowsStore")
     set (USE_GLES2 ON)
   else()
diff --git a/adm/cmake/occt_csf.cmake b/adm/cmake/occt_csf.cmake
index 995ce45ab7..e29877db5d 100644
--- a/adm/cmake/occt_csf.cmake
+++ b/adm/cmake/occt_csf.cmake
@@ -110,7 +110,11 @@ if (WIN32)
     set (CSF_OpenGlLibs  "EGL GLESv2")
   elseif (UNIX)
     set (CSF_ThreadLibs  "pthread rt stdc++")
-    set (CSF_OpenGlLibs  "GL")
+    if (USE_GLES2)
+      set (CSF_OpenGlLibs  "EGL GLESv2")
+    else()
+      set (CSF_OpenGlLibs  "GL")
+    endif()
     set (CSF_XwLibs      "X11 Xext Xmu Xi")
     set (CSF_dl          "dl")
   endif()