D50544.id157008.diff
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D50544.id157008.diff
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	diff --git a/usr.sbin/config/config.5 b/usr.sbin/config/config.5
	--- a/usr.sbin/config/config.5
	+++ b/usr.sbin/config/config.5
	@@ -316,11 +316,28 @@
	.Ar value
	is assumed to be the empty string.
	.Pp
	+Note that, as the common makefiles overwrite the
	+.Va CFLAGS
	+variable after having processed the configuration file,
	+customizing
	+.Va CFLAGS
	+directly via
	+.Ic makeoptions
	+is not possible.
	+Nonetheless, custom compiler flags can be specified using the
	+.Va CONF_CFLAGS
	+variable instead.
	+Its content is appended to
	+.Va CFLAGS
	+after the common makefiles have set the latter, allowing to override their
	+compilation flags.
	+.Pp
	Example:
	.Bd -literal -offset indent -compact
	makeoptions MYMAKEOPTION="foo"
	makeoptions MYMAKEOPTION+="bar"
	makeoptions MYNULLMAKEOPTION
	+makeoptions CONF_CFLAGS+="-DSOME_CONTROLLING_MACRO"
	.Ed
	.\" -------- MAXUSERS --------
	.Pp