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Diffstat (limited to '')
| -rw-r--r-- | configure.ac | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 36ceeef3..4476c8b4 100644 --- a/configure.ac +++ b/configure.ac @@ -1104,6 +1104,14 @@ AC_MSG_CHECKING([if ARM64 CRC32 instruction is usable]) AS_IF([test "x$enable_arm64_crc32" = xno], [ AC_MSG_RESULT([no, --disable-arm64-crc32 was used]) ], [ + # Set -Werror here because some versions of Clang (14 and older) + # do not report the unsupported __attribute__((__target__("+crc"))) + # or __crc32d() as an error, only as a warning. This does not need + # to be done with CMake because tests will attempt to link and the + # error will be reported then. + OLD_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Werror" + AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ #include <arm_acle.h> #include <stdint.h> @@ -1124,6 +1132,8 @@ uint32_t my_crc(uint32_t a, uint64_t b) enable_arm64_crc32=no ]) AC_MSG_RESULT([$enable_arm64_crc32]) + + CFLAGS="$OLD_CFLAGS" ]) # Check for ARM64 CRC32 instruction runtime detection. |