Feature/cpp20 (#740)

Activate cpp20 flag for compilation
Use devtoolset 10 on centOS.
Use gcc 10 on CentOS and Ubuntu

.github/workflows/build_centos7.yml

@@ -4,7 +4,6 @@ on:
   merge_group:
   push:
     branches:
-      - main
       - develop
   pull_request:
   release:
@@ -131,7 +130,7 @@ jobs:
       - name: Configure
         run: |
           [[ ${{ matrix.xprs }} == "XPRESS-ON" ]] && XPRESS_VALUE="ON" || XPRESS_VALUE="OFF" 
-          source /opt/rh/devtoolset-9/enable
+          source /opt/rh/devtoolset-10/enable
           export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
           export PATH=/usr/lib64/openmpi/bin:$PATH
           cmake3 -B _build -S . \
@@ -145,7 +144,7 @@ jobs:
                  -DALLOW_RUN_AS_ROOT=ON
       - name: Build
         run: |
-          source /opt/rh/devtoolset-9/enable
+          source /opt/rh/devtoolset-10/enable
           export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
           export PATH=/usr/lib64/openmpi/bin:$PATH
           cmake3 --build _build --config Release -j8 --target install

.github/workflows/build_ubuntu.yml

@@ -61,6 +61,7 @@ jobs:
         run: |
           sudo apt-get update --fix-missing
           sudo apt-get install -y ccache cmake libgtest-dev libjsoncpp-dev libtbb-dev libopenmpi-dev
+          sudo apt-get install -y g++-10 gcc-10
 
       - name: Read antares-solver version
         id: antares-version
@@ -103,7 +104,9 @@ jobs:
           [[ ${{ matrix.xprs }} == "XPRESS-ON" ]] && XPRESS_VALUE="ON" || XPRESS_VALUE="OFF" 
           cmake -B _build -S . \
                 -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+                -DCMAKE_C_COMPILER=/usr/bin/gcc-10 \
                 -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
+                -DCMAKE_CXX_COMPILER=/usr/bin/g++-10 \
                 -DDEPS_INSTALL_DIR=rte-antares-deps-Release \
                 -DBUILD_TESTING=ON \
                 -DCMAKE_BUILD_TYPE=Release \

CMakeLists.txt

@@ -66,7 +66,7 @@ set(CMAKE_INSTALL_RPATH 		$ORIGIN)
 set (EXECUTABLE_OUTPUT_PATH	${CMAKE_BINARY_DIR})
 set (LIBRARY_OUTPUT_PATH	${CMAKE_BINARY_DIR})
 
-set (CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 
 set (CMAKE_EXPORT_COMPILE_COMMANDS ON)
 

docker/centos7-system-deps

@@ -8,7 +8,7 @@ RUN yum install -y epel-release
 
 RUN \
   yum install -y wget git epel-release redhat-lsb-core gcc gcc-c++ make centos-release-scl scl-utils &&\
-  yum install -y cmake3 devtoolset-9 environment-modules rpm-build zlib-devel &&\
+  yum install -y cmake3 devtoolset-10-gcc* environment-modules rpm-build zlib-devel &&\
   yum install -y jsoncpp-devel openmpi-devel doxygen graphviz &&\
   yum install -y gtest-devel &&\
   yum install -y install python3-devel && \

src/cpp/helpers/FileInBuffer.cpp

@@ -8,7 +8,7 @@ FileBuffer FileInBuffer::run(const std::filesystem::path& filePath) {
   std::ifstream file(filePath);
   std::stringstream buffer;
   if (file.bad()) {
-    std::cerr << "Error while reading file : " << filePath.c_str() << std::endl;
+    std::cerr << "Error while reading file : " << filePath << std::endl;
     return {};
   }
   buffer << file.rdbuf();