Fix the CI problems

- Set conan cppstd to gnu17
- Use CMAKE_CXX_STANDARD to be 17
- Add CONAN_ENABLED guards

CMakeLists.txt

@@ -29,6 +29,9 @@ cmake_policy(VERSION 3.15...3.31)
 # Set name of our project to "R3BROOT". Has to be done after check of cmake version
 project(R3BROOT LANGUAGES C CXX Fortran)
 
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_EXTENSIONS ON)
+
 # use default gnu install convention:
 include(GNUInstallDirs)
 

CMakePresets.json

@@ -29,7 +29,8 @@
                 "BUILD_GEOMETRY": "OFF",
                 "CMAKE_BUILD_TYPE": "RelWithDebInfo",
                 "CMAKE_PROJECT_TOP_LEVEL_INCLUDES": "util/cmake-conan/conan_provider.cmake",
-                "CONAN_ENABLED": "ON"
+                "CONAN_ENABLED": "ON",
+                "CONAN_INSTALL_ARGS": "--build=missing;--settings:build=compiler.cppstd=gnu17"
             }
         },
         {

r3bsource/CMakeLists.txt

@@ -97,7 +97,6 @@ set(SRCS
     califa/R3BCalifaJulichReader.cxx
     tofd/R3BPtofReader.cxx
     neuland/R3BNeulandTamexReader.cxx
-    neuland/R3BNeulandTamexReader2.cxx
     neuland/R3BNeulandTacquilaReader.cxx
     stubes/R3BStrawtubesReader.cxx
     ams/R3BAmsReader.cxx
@@ -236,7 +235,6 @@ set(HEADERS
     califa/R3BCalifaJulichReader.h
     tofd/R3BPtofReader.h
     neuland/R3BNeulandTamexReader.h
-    neuland/R3BNeulandTamexReader2.h
     neuland/R3BNeulandTacquilaReader.h
     stubes/R3BStrawtubesReader.h
     ams/R3BAmsReader.h
@@ -252,6 +250,11 @@ set(HEADERS
     mwpc/R3BMwpcReader.h
     sync_check/R3BSyncCheckReader.h)
 
+if(CONAN_ENABLED)
+    list(APPEND SRCS neuland/R3BNeulandTamexReader2.cxx)
+    list(APPEND HEADERS neuland/R3BNeulandTamexReader2.h)
+endif()
+
 set(HEADERS ${STRUCT_HEADERS} ${HEADERS})
 
 set(DIRS
@@ -295,7 +298,10 @@ add_library_with_dictionary(
     ${DIRS}
     DEPENDENCIES
     R3BData
-    Ucesb
-    PRIVATE_DEPENDENCIES
-    Microsoft.GSL::GSL
-    range-v3::range-v3)
+    Ucesb)
+
+if(CONAN_ENABLED)
+    target_link_libraries(R3BSource PRIVATE Microsoft.GSL::GSL range-v3::range-v3)
+    list(APPEND SRCS neuland/R3BNeulandTamexReader2.cxx)
+    list(APPEND HEADERS neuland/R3BNeulandTamexReader2.h)
+endif()