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-rw-r--r--Tests/RunCMake/CXXModules/ImplicitCXX20.cmake3
1 files changed, 3 insertions, 0 deletions
diff --git a/Tests/RunCMake/CXXModules/ImplicitCXX20.cmake b/Tests/RunCMake/CXXModules/ImplicitCXX20.cmake
index cac1777..64d69f3 100644
--- a/Tests/RunCMake/CXXModules/ImplicitCXX20.cmake
+++ b/Tests/RunCMake/CXXModules/ImplicitCXX20.cmake
@@ -1,6 +1,9 @@
# Enable scanning by default for targets that explicitly use C++ 20.
cmake_policy(SET CMP0155 NEW)
+# Block making C++ `import std` targets.
+add_library(__CMAKE::CXX23 IMPORTED INTERFACE)
+
# Force CMAKE_CXX_STANDARD_DEFAULT to be C++ 20.
set(ENV{CXXFLAGS} "$ENV{CXXFLAGS} ${CMAKE_CXX20_STANDARD_COMPILE_OPTION}")
enable_language(CXX)