From 03b68a5206201bf5bbffb7e4f6a6718907f23b2a Mon Sep 17 00:00:00 2001
From: vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb>
Date: Mon, 9 Nov 2015 09:18:55 +0000
Subject: Modification for Porquerolles Workshop Bar_code_persistence and
 alpha_complex_persistence

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/alphashapes@893 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 63d2d21d5ff7c9a94a67eafc326bf8a561bf8166
---
 src/Alpha_complex/example/CMakeLists.txt | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/Alpha_complex/example')

diff --git a/src/Alpha_complex/example/CMakeLists.txt b/src/Alpha_complex/example/CMakeLists.txt
index 04fc34af..10b87f04 100644
--- a/src/Alpha_complex/example/CMakeLists.txt
+++ b/src/Alpha_complex/example/CMakeLists.txt
@@ -8,6 +8,20 @@ if(CGAL_FOUND)
     message(STATUS "CGAL version: ${CGAL_VERSION}.")
 
     include( ${CGAL_USE_FILE} )
+    # In CMakeLists.txt, when include(${CGAL_USE_FILE}), CXX_FLAGS are overwritten.
+    # cf. http://doc.cgal.org/latest/Manual/installation.html#title40
+    # A workaround is to add "-std=c++11" again.
+    # A fix would be to use https://cmake.org/cmake/help/v3.1/prop_gbl/CMAKE_CXX_KNOWN_FEATURES.html 
+    # or even better https://cmake.org/cmake/help/v3.1/variable/CMAKE_CXX_STANDARD.html
+    # but it implies to use cmake version 3.1 at least.
+    if(NOT MSVC)
+      include(CheckCXXCompilerFlag)
+      CHECK_CXX_COMPILER_FLAG(-std=c++11 COMPILER_SUPPORTS_CXX11)
+      if(COMPILER_SUPPORTS_CXX11)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+      endif()
+    endif()
+    # - End of workaround
  
     find_package(Eigen3 3.1.0)
     if (EIGEN3_FOUND)
-- 
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