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28 lines
695 B
Plaintext
28 lines
695 B
Plaintext
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dnl #
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dnl # Check if gcc supports -Wno-bool-compare option.
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dnl #
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dnl # We actually invoke gcc with the -Wbool-compare option
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dnl # and infer the 'no-' version does or doesn't exist based upon
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dnl # the results. This is required because when checking any of
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dnl # no- prefixed options gcc always returns success.
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dnl #
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AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_NO_BOOL_COMPARE], [
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AC_MSG_CHECKING([for -Wno-bool-compare support])
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saved_flags="$CFLAGS"
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CFLAGS="$CFLAGS -Wbool-compare"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])],
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[
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NO_BOOL_COMPARE=-Wno-bool-compare
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AC_MSG_RESULT([yes])
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],
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[
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NO_BOOL_COMPARE=
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AC_MSG_RESULT([no])
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])
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CFLAGS="$saved_flags"
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AC_SUBST([NO_BOOL_COMPARE])
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])
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