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# Detects whether char, int, etc have their equivalent int intx_t.
function(IsSimilarTo VARIABLE integer)
if(NOT "${${VARIABLE}}" STREQUAL "")
return()
endif()
list(GET ARGN 0 first_item)
list(REMOVE_AT ARGN 0)
set(staticasserts " std::is_same<${integer}, ${first_item}>::value\n")
foreach(var ${ARGN})
set(staticasserts "${staticasserts} or std::is_same<${integer}, ${var}>::value\n")
endforeach()
file(MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/DetectIntegerArchitecture")
file(WRITE "${PROJECT_BINARY_DIR}/DetectIntegerArchitecture/equiv.cc"
"#include <cstdint>\n"
"#include <type_traits>\n"
"static_assert(\n"
"${staticasserts},\n"
" \"${integer} vs ${first_item};${ARGN}\");\n"
"int main(int nargs, char **argv) {\n"
" return 0;\n"
"}\n"
)
file(WRITE "${PROJECT_BINARY_DIR}/DetectIntegerArchitecture/notequiv.cc"
"#include <cstdint>\n"
"#include <type_traits>\n"
"static_assert(not (\n"
"${staticasserts}), \n"
" \"${integer} vs ${ARGN}\");\n"
"int main(int nargs, char **argv) {\n"
" return 0;\n"
"}\n"
)
try_compile(equiv
"${PROJECT_BINARY_DIR}/DetectIntegerArchitecture"
"${PROJECT_BINARY_DIR}/DetectIntegerArchitecture/equiv.cc"
OUTPUT_VARIABLE equiv_out
)
try_compile(notequiv
"${PROJECT_BINARY_DIR}/DetectIntegerArchitecture"
"${PROJECT_BINARY_DIR}/DetectIntegerArchitecture/notequiv.cc"
OUTPUT_VARIABLE notequiv_out
)
if(NOT notequiv AND NOT equiv)
message("${equiv_out}")
message("${notequiv_out}")
message(FATAL_ERROR "Could not acertain integer architecture ${integer}")
elseif(notequiv AND equiv)
message("${equiv_out}")
message("${notequiv_out}")
message(FATAL_ERROR "Could not acertain integer architecture ${integer}")
elseif(equiv)
message(STATUS "${integer} is equivalent to one of ${first_item};${ARGN}")
else()
message(STATUS "${integer} is not equivalent to any of ${first_item};${ARGN}")
endif()
set(${VARIABLE} "${equiv}" PARENT_SCOPE)
endfunction()
function(DetectIntegerArchitecture PREFIX)
if(${PREFIX}_INTEGER_DETECTED)
return()
endif()
set(integers
"std::int8_t" "std::int16_t" "std::int32_t" "std::int64_t"
"std::uint8_t" "std::uint16_t" "std::uint32_t" "std::uint64_t")
IsSimilarTo(${PREFIX}_char char ${integers})
IsSimilarTo(${PREFIX}_long long ${integers} int)
IsSimilarTo(${PREFIX}_unsigned_long "unsigned long" ${integers} "unsigned int")
set(${PREFIX}_CHAR_ARCH ${${PREFIX}_char}
CACHE BOOL "Integer equivalence for char")
set(${PREFIX}_LONG_ARCH ${${PREFIX}_long}
CACHE BOOL "Integer equivalence for long")
set(${PREFIX}_ULONG_ARCH ${${PREFIX}_unsigned_long}
CACHE BOOL "Integer equivalence for unsigned long")
set(${PREFIX}_INTEGER_DETECTED TRUE
CACHE BOOL "Whether to check integer architecture")
endfunction()
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