From 1151519c3bba36b2f87b507d2888fd877e52267d Mon Sep 17 00:00:00 2001
From: Jeremy FOURIAUX <jeremy.fouriaux@epfl.ch>
Date: Thu, 18 Jan 2018 10:30:57 +0000
Subject: [PATCH] Initial Cray Portability (Spike Exchange mini apps for now)

---
 CMake/CrayPortability.cmake | 59 +++++++++++++++++++++++++++++++++++++
 CMakeLists.txt              |  2 ++
 2 files changed, 61 insertions(+)
 create mode 100644 CMake/CrayPortability.cmake

diff --git a/CMake/CrayPortability.cmake b/CMake/CrayPortability.cmake
new file mode 100644
index 00000000..90a55b0b
--- /dev/null
+++ b/CMake/CrayPortability.cmake
@@ -0,0 +1,59 @@
+# Copyright (c) 2017, Blue Brain Project
+# All rights reserved.
+
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+# 1. Redistributions of source code must retain the above copyright notice,
+#    this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+# 3. Neither the name of the copyright holder nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+# THE POSSIBILITY OF SUCH DAMAGE.
+
+## Portability check on Cray system
+## This is tested on Theta
+
+if(IS_DIRECTORY "/opt/cray")
+  set(CRAY_SYSTEM TRUE)
+endif()
+if(CRAY_SYSTEM)
+  ## Cray wrapper already manage a set of common libraries, if specify by user it can lead to conflict during compilation
+    set(MPI_LIBRARIES "")
+    set(MPI_C_LIBRARIES "")
+    set(MPI_CXX_LIBRARIES "")
+    #    set(Boost_PROGRAM_OPTIONS_LIBRARIES "")
+    #    set(Boost_CHRONO_LIBRARIES "")
+    #    set(Boost_SYSTEM_LIBRARIES "")
+    #    set(Boost_ATOMIC_LIBRARIES "")
+    set(Boost_LIBRARIES "")
+  # instead of -rdynamic, cray wrapper needs either -dynamic or -static(default)
+  # also cray compiler needs fPIC flag
+  if(COMPILE_LIBRARY_TYPE STREQUAL "SHARED")
+    set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "-dynamic")
+
+    # Cray compilers need PIC flag
+    if(CMAKE_C_COMPILER_IS_CRAY)
+      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
+      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
+    endif()
+
+  else()
+    set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
+  endif()
+
+endif()
+
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8989c683..5608eb3e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -57,6 +57,8 @@ endif()
 ## MPI link flags need to be overwritten on BG/Q
 include(BlueGenePortability)
 
+## Cray System compatibility (libraries wrappers and specific compiler options)
+include(CrayPortability)
 
 # include all directories
 include_directories(${Boost_INCLUDE_DIRS} ${MPI_C_INCLUDE_PATH} )