--- a/compiler-rt/lib/xray/xray_powerpc64.inc
+++ b/compiler-rt/lib/xray/xray_powerpc64.inc
@@ -12,7 +12,13 @@
 
 #include <cstdint>
 #include <mutex>
+#ifdef __GLIBC__
 #include <sys/platform/ppc.h>
+#else
+#include <cctype>
+#include <cstring>
+#include <cstdlib>
+#endif
 
 #include "xray_defs.h"
 
@@ -20,13 +26,45 @@ namespace __xray {
 
 ALWAYS_INLINE uint64_t readTSC(uint8_t &CPU) XRAY_NEVER_INSTRUMENT {
   CPU = 0;
+#ifdef __GLIBC__
   return __ppc_get_timebase();
+#else
+  return __builtin_ppc_get_timebase();
+#endif
 }
 
 inline uint64_t getTSCFrequency() XRAY_NEVER_INSTRUMENT {
   static std::mutex M;
   std::lock_guard<std::mutex> Guard(M);
+#ifdef __GLIBC__
   return __ppc_get_timebase_freq();
+#else
+  /* FIXME: a less dirty implementation? */
+  static uint64_t base;
+  if (!base) {
+    FILE *f = fopen("/proc/cpuinfo", "rb");
+    if (f) {
+      ssize_t nr;
+      /* virtually always big enough to hold the line */
+      char buf[512];
+      while (fgets(buf, sizeof(buf), f)) {
+        char *ret = strstr(buf, "timebase");
+        if (!ret) {
+          continue;
+        }
+        ret += sizeof("timebase") - 1;
+        ret = strchr(ret, ':');
+        if (!ret) {
+          continue;
+        }
+        base = strtoul(ret + 1, nullptr, 10);
+        break;
+      }
+      fclose(f);
+    }
+  }
+  return base;
+#endif
 }
 
 inline bool probeRequiredCPUFeatures() XRAY_NEVER_INSTRUMENT {
