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build: Restrict check for CRC32C intrinsic to aarch64 #2544

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Jul 20, 2022
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build: Restrict check for CRC32C intrinsic to aarch64 #2544

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6 changes: 5 additions & 1 deletion configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -367,13 +367,17 @@ AX_CHECK_COMPILE_FLAG([-march=armv8-a+crc+crypto],[[ARM_CRC_CXXFLAGS="-march=arm

TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS $ARM_CRC_CXXFLAGS"
AC_MSG_CHECKING(for ARM CRC32 intrinsics)
AC_MSG_CHECKING(for AArch64 CRC32 intrinsics)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <arm_acle.h>
#include <arm_neon.h>
]],[[
#ifdef __aarch64__
__crc32cb(0, 0); __crc32ch(0, 0); __crc32cw(0, 0); __crc32cd(0, 0);
vmull_p64(0, 0);
#else
#error "crc32c library does not support hardware acceleration on 32-bit ARM"
#endif
]])],
[ AC_MSG_RESULT(yes); enable_arm_crc=yes; ],
[ AC_MSG_RESULT(no)]
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