-#else /* !PIPE_OS_APPLE */
- /* not on Apple/Darwin, do it the brute-force way */
+#elif defined(PIPE_OS_LINUX) /* !PIPE_OS_APPLE */
+#if defined(PIPE_ARCH_PPC_64)
+ Elf64_auxv_t aux;
+#else
+ Elf32_auxv_t aux;
+#endif
+ int fd = open("/proc/self/auxv", O_RDONLY | O_CLOEXEC);
+ if (fd >= 0) {
+ while (read(fd, &aux, sizeof(aux)) == sizeof(aux)) {
+ if (aux.a_type == AT_HWCAP) {
+ char *env_vsx = getenv("GALLIVM_VSX");
+ uint64_t hwcap = aux.a_un.a_val;
+ util_cpu_caps.has_altivec = (hwcap >> 28) & 1;
+ if (!env_vsx || env_vsx[0] != '0') {
+ util_cpu_caps.has_vsx = (hwcap >> 7) & 1;
+ }
+ break;
+ }
+ }
+ close(fd);
+ }
+#else /* !PIPE_OS_APPLE && !PIPE_OS_LINUX */
+ /* not on Apple/Darwin or Linux, do it the brute-force way */