Fix WOK extraction when environment variable HAVE_VTK is not defined

diff --git a/src/OS/Draw.tcl b/src/OS/Draw.tcl
index 967f97f914f8f59950d4d8e79cf3efbfc3ad92a3..01dab2fa67c253dee92d5575ef5a567f24cd5e0a 100644 (file)
--- a/src/OS/Draw.tcl
+++ b/src/OS/Draw.tcl
@@ -17,7 +17,7 @@
 proc Draw:toolkits { } {
     set aResult [list TKDraw TKTopTest TKViewerTest TKXSDRAW TKDCAF TKXDEDRAW TKTObjDRAW TKQADraw]
 
-    if { $::env(HAVE_VTK) == "true" } {
+    if { [info exists ::env(HAVE_VTK)] && $::env(HAVE_VTK) == "true" } {
       lappend aResult "TKIVtkDraw"
     }
 

diff --git a/src/OS/Visualization.tcl b/src/OS/Visualization.tcl
index da793208f5f85fe239f25b25774c66c41e7aa68d..72b4f2dd29413f3d4fd0b9d6c45fa01135232451 100644 (file)
--- a/src/OS/Visualization.tcl
+++ b/src/OS/Visualization.tcl
@@ -22,7 +22,7 @@ proc Visualization:toolkits { } {
                      TKNIS \
                      TKVoxel]
 
-    if { "$::env(HAVE_VTK)" == "true" } {
+    if { [info exists ::env(HAVE_VTK)] && "$::env(HAVE_VTK)" == "true" } {
       lappend aResult "TKIVtk"
     }
 
@@ -53,7 +53,7 @@ proc Visualization:depends { } {
 proc Visualization:acdepends { } {
     set aList [list X11 GL FREETYPE]
 
-    if { "$::env(HAVE_VTK)" == "true" } {
+    if { [info exists ::env(HAVE_VTK)] && "$::env(HAVE_VTK)" == "true" } {
       lappend aList "VTK"
     }