From d95c0d8f3d28067527116a2c1eac06f5bf083995 Mon Sep 17 00:00:00 2001
From: vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb>
Date: Fri, 28 Sep 2018 09:00:25 +0000
Subject: https://gitlab.inria.fr/GUDHI/gudhi-devel/issues/32 - [Cmake - Qt5]
 CMake outputs an error when Qt5 is not installed Modify/add cmake messages
 for missing modules

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/cmake_missing_modules_clarification_vincent@3912 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 37e1035f7c27ce994e05386801d72959696de7d4
---
 src/GudhUI/CMakeLists.txt | 81 ++++++++++++++++++++++++++++-------------------
 1 file changed, 48 insertions(+), 33 deletions(-)

(limited to 'src/GudhUI/CMakeLists.txt')

diff --git a/src/GudhUI/CMakeLists.txt b/src/GudhUI/CMakeLists.txt
index b357b8f7..0945e758 100644
--- a/src/GudhUI/CMakeLists.txt
+++ b/src/GudhUI/CMakeLists.txt
@@ -1,40 +1,55 @@
 project(GudhUI)
 
 # Need to find OpenGL first as find_package(Qt5) tries to #include"GL/gl.h" on some platforms
-find_package(OpenGL)
+find_package(OpenGL QUIET)
 
 if (OPENGL_FOUND)
-  find_package(Qt5 COMPONENTS Widgets Xml OpenGL)
-  find_package(QGLViewer)
-  
-  if ( CGAL_FOUND AND Qt5_FOUND AND QGLVIEWER_FOUND AND NOT CGAL_VERSION VERSION_EQUAL 4.8.0)
-  
-    set(CMAKE_AUTOMOC ON)
-    set(CMAKE_AUTOUIC ON)
-    set(CMAKE_INCLUDE_CURRENT_DIR ON)
-  
-    SET(Boost_USE_STATIC_LIBS ON)
-    SET(Boost_USE_MULTITHREAD OFF)
-    include_directories (${QGLVIEWER_INCLUDE_DIR})
-   
-    add_executable  ( GudhUI 
-      gui/gudhui.cpp
-      gui/MainWindow.cpp
-      gui/Menu_k_nearest_neighbors.cpp	
-      gui/Menu_uniform_neighbors.cpp
-      gui/Menu_edge_contraction.cpp  
-      gui/Menu_persistence.cpp
-      view/Viewer_instructor.cpp				
-      view/Viewer.cpp
-    )	
-    target_link_libraries( GudhUI Qt5::Widgets Qt5::Xml Qt5::OpenGL )
-    target_link_libraries( GudhUI ${QGLVIEWER_LIBRARIES} )
-    target_link_libraries( GudhUI ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY} )	
-    if (TBB_FOUND)
-      target_link_libraries( GudhUI ${TBB_LIBRARIES})
+  find_package(Qt5 COMPONENTS Widgets Xml OpenGL QUIET)
+  if (Qt5_FOUND)
+    find_package(QGLViewer QUIET)
+    if ( QGLVIEWER_FOUND)
+
+      if ( CGAL_FOUND AND NOT CGAL_VERSION VERSION_EQUAL 4.8.0)
+        set(CMAKE_AUTOMOC ON)
+        set(CMAKE_AUTOUIC ON)
+        set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+        SET(Boost_USE_STATIC_LIBS ON)
+        SET(Boost_USE_MULTITHREAD OFF)
+        include_directories (${QGLVIEWER_INCLUDE_DIR})
+
+        add_executable  ( GudhUI
+          gui/gudhui.cpp
+          gui/MainWindow.cpp
+          gui/Menu_k_nearest_neighbors.cpp
+          gui/Menu_uniform_neighbors.cpp
+          gui/Menu_edge_contraction.cpp
+          gui/Menu_persistence.cpp
+          view/Viewer_instructor.cpp
+          view/Viewer.cpp
+        )
+        target_link_libraries( GudhUI Qt5::Widgets Qt5::Xml Qt5::OpenGL )
+        target_link_libraries( GudhUI ${QGLVIEWER_LIBRARIES} )
+        target_link_libraries( GudhUI ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY} )
+        if (TBB_FOUND)
+          target_link_libraries( GudhUI ${TBB_LIBRARIES})
+        endif()
+
+        install(TARGETS GudhUI DESTINATION bin)
+        set(GUDHI_MODULES ${GUDHI_MODULES} "GudhUI" CACHE INTERNAL "GUDHI_MODULES")
+      else()
+        message("++ GudhUI will not be compiled because CGAL < 4.8.0 or not found")
+        set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "GudhUI" CACHE INTERNAL "GUDHI_MISSING_MODULES")
+      endif()
+    else()
+      message("++ GudhUI will not be compiled because QGLViewer is not found")
+      set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "GudhUI" CACHE INTERNAL "GUDHI_MISSING_MODULES")
     endif()
-  
-    install(TARGETS GudhUI DESTINATION bin)
-  
+  else()
+    message("++ GudhUI will not be compiled because Qt5 COMPONENTS Widgets Xml OpenGL are not found")
+    set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "GudhUI" CACHE INTERNAL "GUDHI_MISSING_MODULES")
   endif()
-endif(OPENGL_FOUND)
+else()
+  message("++ GudhUI will not be compiled because OpenGL is not found")
+  set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "GudhUI" CACHE INTERNAL "GUDHI_MISSING_MODULES")
+endif()
-- 
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