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源代码在线查看： redef1.c
/* Test for redefining macros with insignificant (i.e. whitespace) differences. */ /* { dg-do preprocess } */ #define foo bar #define /* x */ foo /* x */ bar /* x */ #define quux(thud) a one and a thud and a two #define /**/ quux( thud ) /**/ a one and a /**/ thud /**/ and /**/ a two #define quux(thud) a one and a thud and a two /* bah */ /* { dg-bogus "redefined" "foo redefined" { target *-*-* } 7 } */ /* { dg-bogus "redefined" "quux redefined" { target *-*-* } 10 } */ /* { dg-bogus "redefined" "quux redefined" { target *-*-* } 11 } */ /* { dg-bogus "previous def" "foo prev def" { target *-*-* } 6 } */ /* { dg-bogus "previous def" "quux prev def" { target *-*-* } 9 } */ /* { dg-bogus "previous def" "quux prev def" { target *-*-* } 10 } */
