From 65fe2f907900683621b26fa3d3b6380148c732ac Mon Sep 17 00:00:00 2001
From: Jean-Paul Pelteret <jppelteret@gmail.com>
Date: Fri, 9 Feb 2018 16:02:34 +0100
Subject: [PATCH] Add another compile-time check to Adol-C CMake module.

---
 cmake/configure/configure_adolc.cmake | 29 +++++++++++++++++++++++++++
 cmake/modules/FindADOLC.cmake         |  2 +-
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/cmake/configure/configure_adolc.cmake b/cmake/configure/configure_adolc.cmake
index d76d14233d..7a1b043293 100644
--- a/cmake/configure/configure_adolc.cmake
+++ b/cmake/configure/configure_adolc.cmake
@@ -48,6 +48,21 @@ MACRO(FEATURE_ADOLC_FIND_EXTERNAL var)
       }"
       ADOLC_DOUBLE_CAST_CHECK)
 
+    CHECK_CXX_SOURCE_COMPILES("
+      #include <adolc/adouble.h>
+      #include <adolc/adtl.h>
+      #include <sstream>
+      int main (int argc, char *argv[])
+      {
+        const adouble val_taped = 1.0;
+        const adtl::adouble val_tapeless = 1.0;
+        
+        std::ostringstream ss;
+        ss << val_taped;
+        ss << val_tapeless;
+      }"
+      ADOLC_ADOUBLE_OSTREAM_CHECK)
+
     IF(NOT ADOLC_DOUBLE_CAST_CHECK)
       MESSAGE(STATUS
         "Could not find a sufficient ADOL-C installation: "
@@ -61,6 +76,20 @@ MACRO(FEATURE_ADOLC_FIND_EXTERNAL var)
         )
       SET(${var} FALSE)
     ENDIF()
+
+    IF(NOT ADOLC_ADOUBLE_OSTREAM_CHECK)
+      MESSAGE(STATUS
+        "Could not find a sufficient ADOL-C installation: "
+        "deal.II needs ADOL-C version 2.6.4 or newer."
+        )
+      SET(ADOLC_ADDITIONAL_ERROR_STRING
+        ${ADOLC_ADDITIONAL_ERROR_STRING}
+        "Could not find a sufficient ADOL-C installation:\n"
+        "ADOL-C stream output check failed.\n"
+        "deal.II needs ADOL-C version 2.6.4 or newer."
+        )
+      SET(${var} FALSE)
+    ENDIF()
   ENDIF()
 ENDMACRO()
 
diff --git a/cmake/modules/FindADOLC.cmake b/cmake/modules/FindADOLC.cmake
index 851d3e051a..8cf9263ccb 100644
--- a/cmake/modules/FindADOLC.cmake
+++ b/cmake/modules/FindADOLC.cmake
@@ -83,5 +83,5 @@ DEAL_II_PACKAGE_HANDLE(ADOLC
   INCLUDE_DIRS REQUIRED ADOLC_INCLUDE_DIR
   USER_INCLUDE_DIRS REQUIRED ADOLC_INCLUDE_DIR
   CLEAR ADOLC_INCLUDE_DIR ADOLC_LIBRARY ADOLC_SETTINGS_H
-    ADOLC_DOUBLE_CAST_CHECK # clean up check in configure_adolc.cmake
+    ADOLC_DOUBLE_CAST_CHECK ADOLC_ADOUBLE_OSTREAM_CHECK # clean up checks in configure_adolc.cmake
   )
-- 
2.39.5