Re: OpenBSD/Sparc status
От | Tom Lane |
---|---|
Тема | Re: OpenBSD/Sparc status |
Дата | |
Msg-id | 7361.1100890533@sss.pgh.pa.us обсуждение исходный текст |
Ответ на | OpenBSD/Sparc status (Andrew Dunstan <andrew@dunslane.net>) |
Ответы |
Re: OpenBSD/Sparc status
Re: OpenBSD/Sparc status |
Список | pgsql-hackers |
The answer is: it's a gcc bug. The attached program should print x = 12.3 y = 12.3 but if compiled with -O or -O2 on Stefan's machine, I get garbage: $ gcc -O ftest.c $ ./a.out x = 12.3 y = 1.47203e-39 $ gcc -v Reading specs from /usr/lib/gcc-lib/sparc64-unknown-openbsd3.6/3.3.2/specs Configured with: Thread model: single gcc version 3.3.2 (propolice) $ regards, tom lane #include <stdio.h> float returnfloat(float *x) {return *x; } int main() {float x = 12.3;union { float f; char *t;} y; y.f = returnfloat(&x); printf("x = %g\n", x);printf("y = %g\n", y.f); return 0; }
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