Merge pull request #35 from JohanMabille/cpp17

Upgraded to xeus 3.2.0 and build with cpp17

Author: JohanMabille

CMakeLists.txt

@@ -79,7 +79,7 @@ message(STATUS "XEUS_ZMQ_BUILD_TESTS:                ${XEUS_ZMQ_BUILD_TESTS}")
 # Dependencies
 # ============
 
-set(xeus_REQUIRED_VERSION 3.1.1)
+set(xeus_REQUIRED_VERSION 3.2.0)
 set(nlohmann_json_REQUIRED_VERSION 3.2.0)
 set(cppzmq_REQUIRED_VERSION 4.8.1)
 set(zeromq_REQUIRED_VERSION 4.3.2)
@@ -249,7 +249,7 @@ macro(xeus_zmq_create_target target_name linkage output_name)
     # Compilation flags
     # =================
 
-    target_compile_features(${target_name} PRIVATE cxx_std_14)
+    target_compile_features(${target_name} PRIVATE cxx_std_17)
 
     if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR
         CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR

environment-dev.yml

@@ -12,7 +12,7 @@ dependencies:
   - zeromq-static=4.3.4
   - cppzmq=4.8.1
   - xtl=0.7
-  - xeus>=3.1.1,<4.0
+  - xeus>=3.2.0,<4.0
   - OpenSSL=1 
   - libopenssl-static=1
   - nlohmann_json