Re: [dpdk-dev] [PATCH] ppc64le: fix build with Clang and without glibc

[David Christensen]

On 5/5/21 3:39 PM, Piotr Kubaj wrote:

diff --git a/lib/librte_eal/ppc/include/rte_altivec.h 
b/lib/librte_eal/ppc/include/rte_altivec.h
index 1551a9454..3fcc819c1 100644
--- a/lib/librte_eal/ppc/include/rte_altivec.h
+++ b/lib/librte_eal/ppc/include/rte_altivec.h
@@ -7,6 +7,9 @@
  #define_RTE_ALTIVEC_H_

  /* To include altivec.h, GCC version must be >= 4.8 */
+#ifdef __clang__
+#define vector __vector
+#endif
  #include <altivec.h>

  /*
diff --git a/lib/librte_eal/ppc/include/rte_cycles.h 
b/lib/librte_eal/ppc/include/rte_cycles.h
index 5585f9273..a8307ceaf 100644
--- a/lib/librte_eal/ppc/include/rte_cycles.h
+++ b/lib/librte_eal/ppc/include/rte_cycles.h
@@ -10,7 +10,13 @@
  extern "C" {
  #endif

+#ifdef linux
+#include <features.h>
+#endif
+
+#ifdef __GLIBC__
  #include <sys/platform/ppc.h>
+#endif

  #include "generic/rte_cycles.h"

@@ -26,7 +32,13 @@ extern "C" {
  static inline uint64_t
  rte_rdtsc(void)
  {
+#ifdef __GLIBC__
         return __ppc_get_timebase();
+#else
+       uint64_t __tb;
+       __asm__ volatile ("mfspr %0, 268" : "=r" (__tb));
+       return __tb;
+#endif
  }

  static inline uint64_t
diff --git a/lib/librte_eal/ppc/rte_cycles.c b/lib/librte_eal/ppc/rte_cycles.c
index 3180adb0f..48545c4d6 100644
--- a/lib/librte_eal/ppc/rte_cycles.c
+++ b/lib/librte_eal/ppc/rte_cycles.c
@@ -2,12 +2,28 @@
   * Copyright (C) IBM Corporation 2019.
   */

+#ifdef linux
+#include <features.h>
+#elif defined(__FreeBSD__)
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#endif
+
+#ifdef __GLIBC__
  #include <sys/platform/ppc.h>
+#endif

  #include "eal_private.h"

  uint64_t
  get_tsc_freq_arch(void)
  {
+#ifdef __GLIBC__
         return __ppc_get_timebase_freq();
+#elif defined(__FreeBSD__)
+       uint64_t freq;
+       size_t length = sizeof(freq);
+       sysctlbyname("kern.timecounter.tc.timebase.frequency", &freq, &length, 
NULL, 0);
+       return freq;
+#endif
  }
--
2.31.0

Reviewed-by: David Christensen <d...@linux.vnet.ibm.com>