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cmake_policy(SET CMP0096 OLD)
enable_language(C)
include(CheckTypeSize)
check_type_size(unsigned __sizeOfUnsigned BUILTIN_TYPES_ONLY LANGUAGE C)
# We can't use math() to compute this because it only supports up to
# 64-bit signed integers, so hard-code the types we expect to encounter
if(__sizeOfUnsigned EQUAL 0)
message(STATUS "Multi-architecture build, skipping project version check")
return()
elseif(__sizeOfUnsigned EQUAL 4)
set(maxVal 4294967295)
elseif(__sizeOfUnsigned EQUAL 8)
set(maxVal 18446744073709551615)
else()
message(FATAL_ERROR
"Test needs to be updated for unsigned integer size ${__sizeOfUnsigned}")
endif()
# The real value of this test is when an address sanitizer is enabled.
# It catches situations where the size of the buffer used to compute or
# hold the version components as strings is too small.
project(ProjectA VERSION ${maxVal}.${maxVal}.${maxVal}.${maxVal} LANGUAGES NONE)
if(NOT ${PROJECT_VERSION_MAJOR} EQUAL ${maxVal})
message(FATAL_ERROR "Project version number parsing failed round trip.\n"
"Expected: ${maxVal}\n"
"Computed: ${PROJECT_VERSION_MAJOR}"
)
endif()
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