[dpdk-dev] [PATCH] eal: fix rte_memcpy build on ppc with gcc 9.3
David Christensen
drc at linux.vnet.ibm.com
Mon May 4 19:45:52 CEST 2020
Building DPDK on Ubuntu 20.04 with GCC 9.3.0 results in a "subscript is
outside array bounds" message in rte_memcpy function. The build error
is caused by an interaction between __builtin_constant_p and
"-Werror=array-bounds" as described in this bugzilla:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90387
Modify the code to disable the array-bounds check for GCC versions 9.0
to 9.3.
Signed-off-by: David Christensen <drc at linux.vnet.ibm.com>
---
lib/librte_eal/ppc/include/rte_memcpy.h | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/lib/librte_eal/ppc/include/rte_memcpy.h b/lib/librte_eal/ppc/include/rte_memcpy.h
index 25311ba1d..dce173d4b 100644
--- a/lib/librte_eal/ppc/include/rte_memcpy.h
+++ b/lib/librte_eal/ppc/include/rte_memcpy.h
@@ -8,8 +8,7 @@
#include <stdint.h>
#include <string.h>
-/*To include altivec.h, GCC version must >= 4.8 */
-#include <altivec.h>
+#include "rte_altivec.h"
#ifdef __cplusplus
extern "C" {
@@ -17,6 +16,11 @@ extern "C" {
#include "generic/rte_memcpy.h"
+#if (__GNUC__ == 9 && __GNUC_MINOR__ < 4)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Warray-bounds"
+#endif
+
static inline void
rte_mov16(uint8_t *dst, const uint8_t *src)
{
@@ -192,6 +196,10 @@ rte_memcpy_func(void *dst, const void *src, size_t n)
return ret;
}
+#if (__GNUC__ == 9 && __GNUC_MINOR__ < 4)
+#pragma GCC diagnostic pop
+#endif
+
#ifdef __cplusplus
}
#endif
--
2.18.1
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