step-81: do not require WITH_COMPLEX_VALUES

We are not using any of the SP/Matrices with complex

diff --git a/examples/step-81/CMakeLists.txt b/examples/step-81/CMakeLists.txt
index 0184be5855d946f92a34bc070268f6e38cf7539b..437cd2974b491feab3f3cdc86497c9cd6a8f9a73 100644 (file)
--- a/examples/step-81/CMakeLists.txt
+++ b/examples/step-81/CMakeLists.txt
@@ -37,14 +37,12 @@ endif()
 #
 # Are all dependencies fulfilled?
 #
-if(NOT (DEAL_II_WITH_UMFPACK AND DEAL_II_WITH_COMPLEX_VALUES)) # keep in one line
+if(NOT DEAL_II_WITH_UMFPACK) # keep in one line
   message(FATAL_ERROR "
 Error! This tutorial requires a deal.II library that was configured with the following options:
     DEAL_II_WITH_UMFPACK        = ON
-    DEAL_II_WITH_COMPLEX_VALUES = ON
 However, the deal.II library found at ${DEAL_II_PATH} was configured with these options:
     DEAL_II_WITH_UMFPACK        = ${DEAL_II_WITH_UMFPACK}
-    DEAL_II_WITH_COMPLEX_VALUES = ${DEAL_II_WITH_COMPLEX_VALUES}
 This conflicts with the requirements."
     )
 endif()