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-rw-r--r--Modules/VTKCompatibility.cmake5
1 files changed, 3 insertions, 2 deletions
diff --git a/Modules/VTKCompatibility.cmake b/Modules/VTKCompatibility.cmake
index 7b21bd8..21d8aa0 100644
--- a/Modules/VTKCompatibility.cmake
+++ b/Modules/VTKCompatibility.cmake
@@ -32,6 +32,7 @@ SET(VTK_WGLEXT_FILE "${VTK_SOURCE_DIR}/Utilities/ParseOGLExt/headers/wglext.h"
SET(TIFF_RIGHT_VERSION 1)
# for very old VTK (versions prior to 4.2)
-if (NOT VTK_MAJOR_VERSION)
+MACRO(SOURCE_FILES)
message (FATAL_ERROR "You are trying to build a very old version of VTK (prior to VTK 4.2). To do this you need to use CMake 2.0 as it was the last version of CMake to support VTK 4.0.")
-endif (NOT VTK_MAJOR_VERSION)
+ENDMACRO(SOURCE_FILES)
+