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bug #891: Determine sizeof(void*) via CMAKE variable instead of test program

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(transplanted from 0ec1fc9e11
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This commit is contained in:
Christoph Hertzberg 2014-10-14 14:14:25 +02:00
parent aadbfe78c2
commit 9b79607579
1 changed files with 5 additions and 13 deletions
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18
cmake/EigenTesting.cmake
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@ -452,20 +452,12 @@ macro(ei_set_build_string)
endmacro(ei_set_build_string) endmacro(ei_set_build_string)
macro(ei_is_64bit_env VAR) macro(ei_is_64bit_env VAR)
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/is64.cpp"
"int main() { return (sizeof(int*) == 8 ? 1 : 0); }
")
try_run(run_res compile_res
${CMAKE_CURRENT_BINARY_DIR} "${CMAKE_CURRENT_BINARY_DIR}/is64.cpp"
RUN_OUTPUT_VARIABLE run_output)
if(compile_res AND run_res)
set(${VAR} ${run_res})
elseif(CMAKE_CL_64)
set(${VAR} 1)
elseif("$ENV{Platform}" STREQUAL "X64") # nmake 64 bit
set(${VAR} 1) set(${VAR} 1)
elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
set(${VAR} 0)
else()
message(WARNING "Unsupported pointer size. Please contact the authors.")
endif() endif()
endmacro(ei_is_64bit_env) endmacro(ei_is_64bit_env)