X-Git-Url: https://gerrit.fd.io/r/gitweb?p=deb_dpdk.git;a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Finclude%2Frte_common.h;h=db5ac91c6100fb02ec35145e2cf1cf01ec75dc4d;hp=332f2a439e657bf542d9a5a2750da2eb8a6055a9;hb=6b3e017e5d25f15da73f7700f7f2ac553ef1a2e9;hpb=32e04ea00cd159613e04acef75e52bfca6eeff2f

diff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h
index 332f2a43..db5ac91c 100644
--- a/lib/librte_eal/common/include/rte_common.h
+++ b/lib/librte_eal/common/include/rte_common.h
@@ -59,6 +59,13 @@ extern "C" {
 #define asm __asm__
 #endif
 
+/** C extension macro for environments lacking C11 features. */
+#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L
+#define RTE_STD_C11 __extension__
+#else
+#define RTE_STD_C11
+#endif
+
 #ifdef RTE_ARCH_STRICT_ALIGN
 typedef uint64_t unaligned_uint64_t __attribute__ ((aligned(1)));
 typedef uint32_t unaligned_uint32_t __attribute__ ((aligned(1)));
@@ -268,7 +275,8 @@ rte_align64pow2(uint64_t v)
 /**
  * Macro to return the minimum of two numbers
  */
-#define RTE_MIN(a, b) ({ \
+#define RTE_MIN(a, b) \
+	__extension__ ({ \
 		typeof (a) _a = (a); \
 		typeof (b) _b = (b); \
 		_a < _b ? _a : _b; \
@@ -277,7 +285,8 @@ rte_align64pow2(uint64_t v)
 /**
  * Macro to return the maximum of two numbers
  */
-#define RTE_MAX(a, b) ({ \
+#define RTE_MAX(a, b) \
+	__extension__ ({ \
 		typeof (a) _a = (a); \
 		typeof (b) _b = (b); \
 		_a > _b ? _a : _b; \
@@ -326,6 +335,15 @@ rte_bsf32(uint32_t v)
 /** Take a macro value and get a string version of it */
 #define RTE_STR(x) _RTE_STR(x)
 
+/**
+ * ISO C helpers to modify format strings using variadic macros.
+ * This is a replacement for the ", ## __VA_ARGS__" GNU extension.
+ * An empty %s argument is appended to avoid a dangling comma.
+ */
+#define RTE_FMT(fmt, ...) fmt "%.0s", __VA_ARGS__ ""
+#define RTE_FMT_HEAD(fmt, ...) fmt
+#define RTE_FMT_TAIL(fmt, ...) __VA_ARGS__
+
 /** Mask value of type "tp" for the first "ln" bit set. */
 #define	RTE_LEN2MASK(ln, tp)	\
 	((tp)((uint64_t)-1 >> (sizeof(uint64_t) * CHAR_BIT - (ln))))