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Fix openmp CMake build on non-Linux AArch64 systems.

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This just checks for `/proc/cpuinfo` existing before reading it.

Tested on an ARM macOS machine.
This commit is contained in:
Chandler Carruth 2021-01-17 16:17:07 -08:00
parent 95d146182f
commit f855751c12
1 changed files with 8 additions and 6 deletions
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14
openmp/runtime/cmake/LibompGetArchitecture.cmake
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@ -71,13 +71,15 @@ function(libomp_get_architecture return_arch)
endfunction()
function(libomp_is_aarch64_a64fx return_is_aarch64_a64fx)
file(READ "/proc/cpuinfo" cpu_info_content)
string(REGEX MATCH "CPU implementer[ \t]*: 0x46\n" cpu_implementer ${cpu_info_content})
string(REGEX MATCH "CPU architecture[ \t]*: 8\n" cpu_architecture ${cpu_info_content})
set(is_aarch64_a64fx FALSE)
if (cpu_architecture AND cpu_implementer)
set(is_aarch64_a64fx TRUE)
if (EXISTS "/proc/cpuinfo")
file(READ "/proc/cpuinfo" cpu_info_content)
string(REGEX MATCH "CPU implementer[ \t]*: 0x46\n" cpu_implementer ${cpu_info_content})
string(REGEX MATCH "CPU architecture[ \t]*: 8\n" cpu_architecture ${cpu_info_content})
if (cpu_architecture AND cpu_implementer)
set(is_aarch64_a64fx TRUE)
endif()
endif()
set(${return_is_aarch64_a64fx} "${is_aarch64_a64fx}" PARENT_SCOPE)