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34 lines
818 B
Plaintext
34 lines
818 B
Plaintext
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dnl # SPDX-License-Identifier: CDDL-1.0
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dnl #
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dnl # Check whether assembler supports .cfi_negate_ra_state on AArch64.
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dnl #
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AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_CFI_PSEUDO_OP], [
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case "$host_cpu" in
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aarch64*)
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AC_CACHE_CHECK([whether assembler supports .cfi_negate_ra_state],
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[zfs_cv_as_cfi_pseudo_op], [
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cat > conftest.S <<_ACEOF
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.text
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conftest:
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.cfi_startproc
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.cfi_negate_ra_state
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ret
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.cfi_endproc
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_ACEOF
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if AC_TRY_COMMAND([$CC -c $CFLAGS $CPPFLAGS conftest.S -o conftest.o]) >/dev/null 2>&1; then
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zfs_cv_as_cfi_pseudo_op=yes
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else
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zfs_cv_as_cfi_pseudo_op=no
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fi
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rm -f conftest.S conftest.o
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])
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AS_IF([test "x$zfs_cv_as_cfi_pseudo_op" = xyes], [
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AC_DEFINE([HAVE_AS_CFI_PSEUDO_OP], 1,
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[Define if your assembler supports .cfi_negate_ra_state.])
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])
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;;
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esac
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])
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