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CMake: Be less rejective towards unsupported MSVC compilers for Conan (#454)

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Sebastian Pipping 2021-03-26 16:13:20 +01:00
parent a29faca366
commit 9fafff73cd
1 changed files with 16 additions and 4 deletions
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20
expat/CMakeLists.txt
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@ -130,10 +130,22 @@ if(EXPAT_WITH_LIBBSD)
endif()
if(MSVC)
# Minimum supported MSVC version is 1910 = Visual Studio 15.0/2017
# See also https://cmake.org/cmake/help/latest/variable/MSVC_VERSION.html
if(MSVC_VERSION VERSION_LESS 1910)
message(SEND_ERROR "MSVC_VERSION ${MSVC_VERSION} is not a supported Visual Studio compiler version. Please use Visual Studio 15.0/2017 or any later version.")
# For the three types of MSVC version values, please see:
# - https://cmake.org/cmake/help/latest/variable/MSVC_VERSION.html
# - https://sourceforge.net/p/predef/wiki/Compilers/
# - https://en.wikipedia.org/wiki/Microsoft_Visual_Studio#History
set(_EXPAT_MSVC_REQUIRED_INT 1800) # i.e. 12.0/2013/1800; see PR #426
set(_EXPAT_MSVC_SUPPORTED_INT 1910)
set(_EXPAT_MSVC_SUPPORTED_DISPLAY "Visual Studio 15.0/2017/${_EXPAT_MSVC_SUPPORTED_INT}")
if(MSVC_VERSION VERSION_LESS ${_EXPAT_MSVC_SUPPORTED_INT})
if(MSVC_VERSION VERSION_LESS ${_EXPAT_MSVC_REQUIRED_INT})
message(SEND_ERROR "MSVC_VERSION ${MSVC_VERSION} is TOO OLD to compile Expat without errors.")
message(SEND_ERROR "Please use officially supported ${_EXPAT_MSVC_SUPPORTED_DISPLAY} or later. Thank you!")
else()
message(WARNING "MSVC_VERSION ${MSVC_VERSION} is NOT OFFICIALLY SUPPORTED by Expat.")
message(WARNING "Please use ${_EXPAT_MSVC_SUPPORTED_DISPLAY} or later. Thank you!")
endif()
endif()
endif()