From 89911f674b79c930a6f936a092748e4070d99e46 Mon Sep 17 00:00:00 2001
From: ROUVREAU Vincent <vincent.rouvreau@inria.fr>
Date: Wed, 12 Feb 2020 10:08:45 +0100
Subject: Make boost available even if cmake is < 3.5

---
 .../modules/GUDHI_third_party_libraries.cmake      | 35 ++++++++++++++++++++--
 1 file changed, 32 insertions(+), 3 deletions(-)

(limited to 'src/cmake')

diff --git a/src/cmake/modules/GUDHI_third_party_libraries.cmake b/src/cmake/modules/GUDHI_third_party_libraries.cmake
index 10b2b56a..6f01dc85 100644
--- a/src/cmake/modules/GUDHI_third_party_libraries.cmake
+++ b/src/cmake/modules/GUDHI_third_party_libraries.cmake
@@ -6,6 +6,38 @@ if(NOT Boost_FOUND)
   message(FATAL_ERROR "NOTICE: This program requires Boost and will not be compiled.")
 endif(NOT Boost_FOUND)
 
+# cf. https://cliutils.gitlab.io/modern-cmake/chapters/packages/Boost.html
+# This is needed if your Boost version is newer than your CMake version
+# or if you have an old version of CMake (<3.5)
+if(NOT TARGET Boost::program_options)
+    add_library(Boost::program_options IMPORTED INTERFACE)
+    set_property(TARGET Boost::program_options PROPERTY
+        INTERFACE_INCLUDE_DIRECTORIES ${Boost_INCLUDE_DIR})
+    set_property(TARGET Boost::program_options PROPERTY
+        INTERFACE_LINK_LIBRARIES ${Boost_LIBRARIES})
+endif()
+if(NOT TARGET Boost::filesystem)
+    add_library(Boost::filesystem IMPORTED INTERFACE)
+    set_property(TARGET Boost::filesystem PROPERTY
+        INTERFACE_INCLUDE_DIRECTORIES ${Boost_INCLUDE_DIR})
+    set_property(TARGET Boost::filesystem PROPERTY
+        INTERFACE_LINK_LIBRARIES ${Boost_LIBRARIES})
+endif()
+if(NOT TARGET Boost::unit_test_framework)
+    add_library(Boost::unit_test_framework IMPORTED INTERFACE)
+    set_property(TARGET Boost::unit_test_framework PROPERTY
+        INTERFACE_INCLUDE_DIRECTORIES ${Boost_INCLUDE_DIR})
+    set_property(TARGET Boost::unit_test_framework PROPERTY
+        INTERFACE_LINK_LIBRARIES ${Boost_LIBRARIES})
+endif()
+if(NOT TARGET Boost::system)
+    add_library(Boost::system IMPORTED INTERFACE)
+    set_property(TARGET Boost::system PROPERTY
+        INTERFACE_INCLUDE_DIRECTORIES ${Boost_INCLUDE_DIR})
+    set_property(TARGET Boost::system PROPERTY
+        INTERFACE_LINK_LIBRARIES ${Boost_LIBRARIES})
+endif()
+
 find_package(GMP)
 if(GMP_FOUND)
   INCLUDE_DIRECTORIES(${GMP_INCLUDE_DIR})
@@ -82,9 +114,6 @@ add_definitions( -DBOOST_ALL_DYN_LINK )
 # problem on Mac with boost_system and boost_thread
 add_definitions( -DBOOST_SYSTEM_NO_DEPRECATED )
 
-#INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})
-#LINK_DIRECTORIES(${Boost_LIBRARY_DIRS})
-
 message(STATUS "boost include dirs:" ${Boost_INCLUDE_DIRS})
 message(STATUS "boost library dirs:" ${Boost_LIBRARY_DIRS})
 
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