build: work around ccache/autotools warning-spamming bug
When using clang and ccache, builds spew lots of: Clang: warning: argument unused during compilation Upstream bug: https://bugzilla.samba.org/show_bug.cgi?id=8118 This is harmless, bug annoying. If ccache is being used and the -Qunused-arguments flag is supported (clang), use it.
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@ -656,6 +656,9 @@ if test "x$use_ccache" != "xno"; then
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fi
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AC_MSG_RESULT($use_ccache)
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fi
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if test "x$use_ccache" = "xyes"; then
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AX_CHECK_PREPROC_FLAG([-Qunused-arguments],[CPPFLAGS="-Qunused-arguments $CPPFLAGS"])
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fi
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dnl enable wallet
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AC_MSG_CHECKING([if wallet should be enabled])
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