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c2d17fd891
As of gcc version 5.1.1 a new boolean comparison warning has been introduced. This warning is harmless but is triggered several places in the ZFS code base. Because warnings are promoted to errors when building with debugging enabled it is necessary to disable the warning when using versions of gcc which automatically enabling this check. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
28 lines
695 B
Plaintext
28 lines
695 B
Plaintext
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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