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Warn if PUGIXML_STRING_VIEW is set without CMAKE_CXX_STANDARD (#638)

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Even if the compiler supports C++17, we define CMAKE_CXX_STANDARD as 11
by default which implicitly disables string_view support; for now warn
in this case.
This commit is contained in:
Arseny Kapoulkine 2024-10-26 10:20:06 -07:00 committed by GitHub
parent 13beda24b8
commit 23e617b158
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1 changed files with 5 additions and 1 deletions
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6
CMakeLists.txt
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@ -48,7 +48,7 @@ option(PUGIXML_INSTALL "Enable installation rules" ON)
option(PUGIXML_NO_XPATH "Disable XPath" OFF)
option(PUGIXML_NO_STL "Disable STL" OFF)
option(PUGIXML_NO_EXCEPTIONS "Disable Exceptions" OFF)
option(PUGIXML_STRING_VIEW "Enable std::string_view overloads" OFF) # requires C++17 and for PUGI_NO_STL to be OFF
option(PUGIXML_STRING_VIEW "Enable std::string_view overloads" OFF) # requires C++17 and for PUGIXML_NO_STL to be OFF
mark_as_advanced(PUGIXML_NO_XPATH PUGIXML_NO_STL PUGIXML_NO_EXCEPTIONS PUGIXML_STRING_VIEW)
set(PUGIXML_PUBLIC_DEFINITIONS
@ -66,6 +66,10 @@ if (NOT DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
MultiThreaded$<$<CONFIG:Debug>:Debug>$<$<NOT:$<BOOL:${PUGIXML_STATIC_CRT}>>:DLL>)
endif()
if (PUGIXML_STRING_VIEW AND (NOT DEFINED CMAKE_CXX_STANDARD OR CMAKE_CXX_STANDARD LESS 17))
message(WARNING "PUGIXML_STRING_VIEW requires CMAKE_CXX_STANDARD to be set to 17 or later")
endif()
if (NOT DEFINED CMAKE_CXX_STANDARD_REQUIRED)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
endif()