From 4af85ef7b00653a367e481d8689fc69e42502020 Mon Sep 17 00:00:00 2001
From: bruneton <bruneton>
Date: Wed, 17 Jul 2013 08:01:06 +0000
Subject: [PATCH] CMake: added warning message when the reference variable
 passed to the macro SALOME_FIND_PACKAGE_AND_DETECT_CONFLICTS() is not defined
 or empty.

---
 salome_adm/cmake_files/SalomeMacros.cmake | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/salome_adm/cmake_files/SalomeMacros.cmake b/salome_adm/cmake_files/SalomeMacros.cmake
index acf423372..6c0a84ebf 100755
--- a/salome_adm/cmake_files/SalomeMacros.cmake
+++ b/salome_adm/cmake_files/SalomeMacros.cmake
@@ -377,6 +377,13 @@ MACRO(SALOME_FIND_PACKAGE_AND_DETECT_CONFLICTS pkg referenceVariable upCount)
     ## 3. Set the root dir which was finally retained by going up "upDir" times
     ## from the given reference path. The variable "referenceVariable" may be a list.
     ## In this case we take its first element. 
+    
+    # First test if the variable exists and is not empty:
+    IF((NOT DEFINED ${referenceVariable}) OR ("${${referenceVariable}}" STREQUAL ""))
+      MESSAGE(WARNING "${pkg}: the reference variable '${referenceVariable}' used when calling the macro "
+      "SALOME_FIND_PACKAGE_AND_DETECT_CONFLICTS() does not exist or is empty.")
+    ENDIF()
+    
     LIST(LENGTH ${referenceVariable} _tmp_len)
     IF(_tmp_len)
        LIST(GET ${referenceVariable} 0 _tmp_ROOT_DIR)
-- 
2.39.2