From ab822a9b48d43ffec3cc775eb8c8028ac4a96d2e Mon Sep 17 00:00:00 2001
From: Claudio Fantacci <claudio.fantacci@gmail.com>
Date: Tue, 6 Aug 2019 12:57:50 +0200
Subject: FindGLEW: Add required OpenGL dependency in macOS

macOS requires OpenGL as INTERFACE_LINK_LIBRARIES dependency
in the GLEW targets. This commit fixes this issue.
---
 Modules/FindGLEW.cmake | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'Modules/FindGLEW.cmake')

diff --git a/Modules/FindGLEW.cmake b/Modules/FindGLEW.cmake
index 18320b449b..0c4dc80011 100644
--- a/Modules/FindGLEW.cmake
+++ b/Modules/FindGLEW.cmake
@@ -70,6 +70,22 @@ if(GLEW_VERBOSE)
   message(STATUS "FindGLEW: did not find GLEW CMake config file. Searching for libraries.")
 endif()
 
+if(APPLE)
+  find_package(OpenGL QUIET)
+
+  if(OpenGL_FOUND)
+    if(GLEW_VERBOSE)
+      message(STATUS "FindGLEW: Found OpenGL Framework.")
+      message(STATUS "FindGLEW: OPENGL_LIBRARIES: ${OPENGL_LIBRARIES}")
+    endif()
+  else()
+    if(GLEW_VERBOSE)
+      message(STATUS "FindGLEW: could not find GLEW library.")
+    endif()
+    return()
+  endif()
+endif()
+
 
 function(__glew_set_find_library_suffix shared_or_static)
   if((UNIX AND NOT APPLE) AND "${shared_or_static}" MATCHES "SHARED")
@@ -210,6 +226,11 @@ if(NOT TARGET GLEW::glew AND NOT GLEW_USE_STATIC_LIBS)
   set_target_properties(GLEW::glew
                         PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${GLEW_INCLUDE_DIRS}")
 
+  if(APPLE)
+    set_target_properties(GLEW::glew
+                          PROPERTIES INTERFACE_LINK_LIBRARIES OpenGL::GL)
+  endif()
+
   if(GLEW_SHARED_LIBRARY_RELEASE)
     set_property(TARGET GLEW::glew
                  APPEND
@@ -238,6 +259,11 @@ elseif(NOT TARGET GLEW::glew_s AND GLEW_USE_STATIC_LIBS)
   set_target_properties(GLEW::glew_s
                         PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${GLEW_INCLUDE_DIRS}")
 
+  if(APPLE)
+    set_target_properties(GLEW::glew_s
+                          PROPERTIES INTERFACE_LINK_LIBRARIES OpenGL::GL)
+  endif()
+
   if(GLEW_STATIC_LIBRARY_RELEASE)
     set_property(TARGET GLEW::glew_s
                  APPEND
@@ -267,6 +293,11 @@ if(NOT TARGET GLEW::GLEW)
   set_target_properties(GLEW::GLEW
                         PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${GLEW_INCLUDE_DIRS}")
 
+  if(APPLE)
+    set_target_properties(GLEW::GLEW
+                          PROPERTIES INTERFACE_LINK_LIBRARIES OpenGL::GL)
+  endif()
+
   if(TARGET GLEW::glew)
     if(GLEW_SHARED_LIBRARY_RELEASE)
       set_property(TARGET GLEW::GLEW
-- 
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