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annotate gcc/testsuite/gcc.dg/cpp/undef2.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children
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1 /* C99 6.10.8 para 4: None of [the predefined macro names] shall be
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2 the subject of a #define or an #undef preprocessing directive. */
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3
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4 /* { dg-do preprocess } */
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5
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6 #undef __DATE__ /* { dg-warning "-:undefining \"__DATE__\"" } */
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7 #undef __TIME__ /* { dg-warning "-:undefining \"__TIME__\"" } */
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8 #undef __FILE__ /* { dg-warning "-:undefining \"__FILE__\"" } */
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9 #undef __LINE__ /* { dg-warning "undefining \"__LINE__\"" } */
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10 #undef __STDC__ /* { dg-warning "undefining \"__STDC__\"" } */
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12 /* These should be protected from #undef, but aren't, because they
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13 are set with normal #define commands - and on top of that, some
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14 of them are library properties, outside our control. To consider:
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15 warn about undefining/redefining any identifier beginning with
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16 __STDC_ .
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17
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18 __STDC_HOSTED__
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19 __STDC_VERSION__
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20 __STDC_IEC_559__
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21 __STDC_IEC_559_COMPLEX__
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22 __STDC_ISO_10646__
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23 */