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aarch64: use compiler flag outline-atomics if available

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outline-atomics compilation flag changes behaviour of builtin_atomics,
by adding runtime detection of LSE atomics. If these are supported, they
will be used. This gains LSE atomics use without hurting compatibility
with older aarch64 machines.
This commit is contained in:
Tzachi Zidenberg
2020-07-05 15:21:43 +03:00
parent c76b45a524
commit f843e215f3
1 changed files with 5 additions and 0 deletions
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5
configure.cmake
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@@ -69,6 +69,11 @@ IF(CMAKE_SYSTEM_PROCESSOR STREQUAL "i686" AND CMAKE_COMPILER_IS_GNUCC AND
SET(PLUGIN_QUERY_RESPONSE_TIME NO CACHE BOOL "Disabled, gcc is too old")
ENDIF()
# use runtime atomic-support detection in aarch64
IF(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64")
MY_CHECK_AND_SET_COMPILER_FLAG("-moutline-atomics")
ENDIF()
IF(WITHOUT_DYNAMIC_PLUGINS)
MESSAGE("Dynamic plugins are disabled.")
ENDIF(WITHOUT_DYNAMIC_PLUGINS)