fix opengl on hp

Modules/FindOpenGL.cmake

@@ -19,7 +19,7 @@ ELSE (WIN32)
   )
 
 
-  FIND_LIBRARY(OPENGL_LIB_PATH GL
+  FIND_LIBRARY(OPENGL_LIBRARY GL
   /usr/lib 
   /usr/local/lib 
   /opt/graphics/OpenGL/lib 
@@ -27,7 +27,4 @@ ELSE (WIN32)
   /usr/X11R6/lib
   )
 
-  # right now we only look for -lgl maybe in future also mesa
-  SET (OPENGL_LIBRARY GL CACHE)
-
 ENDIF (WIN32)

Source/cmSystemTools.cxx

@@ -799,7 +799,7 @@ std::string cmSystemTools::FindLibrary(const char* name,
       return cmSystemTools::CollapseFullPath(tryPath.c_str());
       }
     tryPath = *p;
-    tryPath = "/lib";
+    tryPath += "/lib";
     tryPath += name;
     tryPath += ".a";
     if(cmSystemTools::FileExists(tryPath.c_str()))
@@ -807,7 +807,7 @@ std::string cmSystemTools::FindLibrary(const char* name,
       return cmSystemTools::CollapseFullPath(tryPath.c_str());
       }
     tryPath = *p;
-    tryPath = "/lib";
+    tryPath += "/lib";
     tryPath += name;
     tryPath += ".sl";
     if(cmSystemTools::FileExists(tryPath.c_str()))