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jeremybenn |
/* C99 6.10.8 para 4: None of [the predefined macro names] shall be
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the subject of a #define or an #undef preprocessing directive. We
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pass -fno-show-column as otherwise dejagnu gets confused. */
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/* { dg-do preprocess } */
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/* { dg-options "-fno-show-column" } */
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#undef __DATE__ /* { dg-warning "undefining" "__DATE__" } */
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#undef __TIME__ /* { dg-warning "undefining" "__TIME__" } */
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#undef __FILE__ /* { dg-warning "undefining" "__FILE__" } */
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#undef __LINE__ /* { dg-warning "undefining" "__LINE__" } */
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#undef __STDC__ /* { dg-warning "undefining" "__STDC__" } */
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/* These should be protected from #undef, but aren't, because they
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are set with normal #define commands - and on top of that, some
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of them are library properties, outside our control. To consider:
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warn about undefining/redefining any identifier beginning with
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__STDC_ .
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__STDC_HOSTED__
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__STDC_VERSION__
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__STDC_IEC_559__
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__STDC_IEC_559_COMPLEX__
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__STDC_ISO_10646__
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*/
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