From dba50215c1f5a53a5b1b68573cf32450128d1615 Mon Sep 17 00:00:00 2001
From: "Toby D. Young" <tyoung@ippt.pan.pl>
Date: Thu, 14 Nov 2013 14:16:32 +0000
Subject: [PATCH] Add a harmless macro PETSC_WITH_COMPLEX.

git-svn-id: https://svn.dealii.org/trunk@31653 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/cmake/modules/FindPETSC.cmake | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/deal.II/cmake/modules/FindPETSC.cmake b/deal.II/cmake/modules/FindPETSC.cmake
index 3bd673927c..1a4f3122c4 100644
--- a/deal.II/cmake/modules/FindPETSC.cmake
+++ b/deal.II/cmake/modules/FindPETSC.cmake
@@ -29,6 +29,7 @@
 #     PETSC_VERSION_PATCH
 #     PETSC_WITH_MPIUNI
 #     PETSC_WITH_64BIT_INDICES
+#     PETSC_WITH_COMPLEX
 #
 
 INCLUDE(FindPackageHandleStandardArgs)
@@ -207,6 +208,17 @@ IF(PETSC_FOUND)
     SET(PETSC_WITH_64BIT_INDICES TRUE)
   ENDIF()
 
+  #
+  # Is petsc compiled with support for COMPLEX numbers?
+  #
+  FILE(STRINGS "${PETSC_PETSCCONF_H}" PETSC_COMPLEX_STRING
+    REGEX "#define.*PETSC_USE_COMPLEX 1")
+  IF("${PETSC_COMPLEX_STRING}" STREQUAL "")
+    SET(PETSC_WITH_COMPLEX FALSE)
+  ELSE()
+    SET(PETSC_WITH_COMPLEX TRUE)
+  ENDIF()
+
   FILE(STRINGS "${PETSC_PETSCVERSION_H}" PETSC_VERSION_MAJOR_STRING
     REGEX "#define.*PETSC_VERSION_MAJOR")
   STRING(REGEX REPLACE "^.*PETSC_VERSION_MAJOR.*([0-9]+).*" "\\1"
-- 
2.39.5