| // RUN: %clang -O2 %s -o %t && %run %t | |
| // UNSUPPORTED: android netbsd darwin solaris | |
| // | |
| #include <sys/types.h> | |
| #if !defined(__GLIBC_PREREQ) | |
| #define __GLIBC_PREREQ(a, b) 0 | |
| #endif | |
| #if (defined(__linux__) && __GLIBC_PREREQ(2, 25)) || defined(__FreeBSD__) | |
| #define HAS_GETRANDOM | |
| #endif | |
| #if defined(HAS_GETRANDOM) | |
| #include <sys/random.h> | |
| #endif | |
| int main() { | |
| char buf[16]; | |
| ssize_t n = 1; | |
| #if defined(HAS_GETRANDOM) | |
| n = getrandom(buf, sizeof(buf), 0); | |
| #endif | |
| return (int)(n <= 0); | |
| } |