From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Thu, 27 Sep 2018 02:26:03 +0000 (+0200)
Subject: Add PETSc check
X-Git-Tag: v9.1.0-rc1~621^2~3
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66944bcb39a3c458484b7a8c081c5114af0849cb;p=dealii.git

Add PETSc check
---

diff --git a/cmake/configure/configure_3_petsc.cmake b/cmake/configure/configure_3_petsc.cmake
index 0f1e6433ec..f95de0331a 100644
--- a/cmake/configure/configure_3_petsc.cmake
+++ b/cmake/configure/configure_3_petsc.cmake
@@ -94,6 +94,25 @@ MACRO(FEATURE_PETSC_FIND_EXTERNAL var)
       SET(${var} FALSE)
     ENDIF()
 
+    # If PETSc is compiled with complex scalar type we need to have support
+    # for complex values within deal.II as well.
+    #
+    IF( PETSC_WITH_COMPLEX AND NOT DEAL_II_WITH_COMPLEX_VALUES )
+        MESSAGE(STATUS "The PETSc configuration is incompatible with the deal.II configuration: "
+        "PETSc is compiled with complex scalar type. "
+        "This requites support for complex values in deal.II as well."
+        )
+      SET(PETSC_ADDITIONAL_ERROR_STRING
+        ${PETSC_ADDITIONAL_ERROR_STRING}
+        "The PETSc configuration is incompatible with the deal.II configuration:\n"
+        "PETSc is compiled with complex scalar type. "
+        "This requites support for complex values in deal.II as well.\n"
+        "  DEAL_II_WITH_COMPLEX_VALUES = ${DEAL_II_WITH_COMPLEX_VALUES}\n"
+        "  PETSC_WITH_COMPLEX = (${PETSC_WITH_COMPLEX})\n"
+        )
+      SET(${var} FALSE)
+    ENDIF()
+
     CHECK_MPI_INTERFACE(PETSC ${var})
   ENDIF()
 ENDMACRO()