version 1.21, 2014/04/30 06:06:09 |
version 1.22, 2014/05/03 14:13:52 |
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.Fl U |
.Fl U |
command line options or in |
command line options or in |
.Fl f |
.Fl f |
definitions files. |
definition files. |
A directive is processed |
A directive is processed |
if the macro specifications are sufficient to provide |
if the macro specifications are sufficient to provide |
a definite value for its control expression. |
a definite value for its control expression. |
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.Ic #define |
.Ic #define |
in a |
in a |
.Fl f |
.Fl f |
definitions file, |
definition file, |
its arguments are ignored. |
its arguments are ignored. |
If a macro is explicitly undefined on the command line with the |
If a macro is explicitly undefined on the command line with the |
.Fl U |
.Fl U |
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.Ic #undef |
.Ic #undef |
in a |
in a |
.Fl f |
.Fl f |
definitions file, |
definition file, |
it may not have any arguments since this leads to a syntax error. |
it may not have any arguments since this leads to a syntax error. |
.Pp |
.Pp |
The |
The |
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The |
The |
.Nm |
.Nm |
utility works nicely with the |
utility works nicely with the |
.Fl D Ns Ar sym |
.Fl D |
option of |
option of |
.Xr diff 1 . |
.Xr diff 1 . |
.Sh EXIT STATUS |
.Sh EXIT STATUS |