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Experiments with C++/C standards #4005

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6 changes: 3 additions & 3 deletions cpp/demo/poisson/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,8 @@
#
cmake_minimum_required(VERSION 3.21)

set(CMAKE_C_EXTENSIONS OFF)
set(CMAKE_CXX_EXTENSIONS OFF)
set(PROJECT_NAME demo_poisson)
project(${PROJECT_NAME} LANGUAGES C CXX)

Expand Down Expand Up @@ -43,9 +45,7 @@ set(CMAKE_INCLUDE_CURRENT_DIR ON)
add_executable(${PROJECT_NAME} main.cpp ${CMAKE_CURRENT_BINARY_DIR}/poisson.c)
target_link_libraries(${PROJECT_NAME} dolfinx)

# Set C++20 standard
set(CMAKE_CXX_EXTENSIONS OFF)
target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_20)
target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_20 c_std_23)

# Do not throw error for 'multi-line comments' (these are typical in rst which
# includes LaTeX)
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