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FreeBSD_version.c
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Editing: FreeBSD_version.c
/* $FreeBSD$ */ #if __FreeBSD__ == 0 /* 1.0 did not define __FreeBSD__ */ #define __FreeBSD_version 199401 #elif __FreeBSD__ == 1 /* 1.1 defined it to be 1 */ #define __FreeBSD_version 199405 #else /* 2.0 and higher define it to be 2 */ #include <osreldate.h> /* and this works */ #endif #include <stdio.h> #include <unistd.h> int main(void) { printf("Compilation release date: %d\n", __FreeBSD_version); #if __FreeBSD_version >= 199408 printf("Execution environment release date: %d\n", getosreldate()); #else printf("Execution environment release date: can't tell\n"); #endif return (0); }
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