eal: fix C++ app build

 * Forward declaration of enum in C++ requires explicit underlying
   type definitions.

 * This fixes the issue at:
   http://dpdk.org/ml/archives/dev/2015-April/017065.html

include/generic/rte_cpuflags.h:50:6:
error: use of enum ‘rte_cpu_flag_t’ without previous declaration
 enum rte_cpu_flag_t;

include/generic/rte_cpuflags.h:55:6:
error: use of enum ‘cpu_register_t’ without previous declaration
 enum cpu_register_t;

Signed-off-by: Joongi Kim <joongi@an.kaist.ac.kr>
[Thomas: fix extended to ppc and tile]

diff --git a/lib/librte_eal/common/include/arch/ppc_64/rte_cpuflags.h b/lib/librte_eal/common/include/arch/ppc_64/rte_cpuflags.h
index df45047..f1cfc4f 100644 (file)
--- a/lib/librte_eal/common/include/arch/ppc_64/rte_cpuflags.h
+++ b/lib/librte_eal/common/include/arch/ppc_64/rte_cpuflags.h
@@ -49,7 +49,7 @@ extern "C" {
 #define AT_HWCAP2 26
 
 /* software based registers */
-enum cpu_register_t {
+enum cpu_register_t __RTE_REGISTER_UNDERLYING_TYPE {
        REG_HWCAP = 0,
        REG_HWCAP2,
 };
@@ -57,7 +57,7 @@ enum cpu_register_t {
 /**
  * Enumeration of all CPU features supported
  */
-enum rte_cpu_flag_t {
+enum rte_cpu_flag_t __RTE_CPUFLAG_UNDERLYING_TYPE {
        RTE_CPUFLAG_PPC_LE = 0,
        RTE_CPUFLAG_TRUE_LE,
        RTE_CPUFLAG_PSERIES_PERFMON_COMPAT,

diff --git a/lib/librte_eal/common/include/arch/tile/rte_cpuflags.h b/lib/librte_eal/common/include/arch/tile/rte_cpuflags.h
index 08aa957..d6696d3 100644 (file)
--- a/lib/librte_eal/common/include/arch/tile/rte_cpuflags.h
+++ b/lib/librte_eal/common/include/arch/tile/rte_cpuflags.h
@@ -45,14 +45,14 @@ extern "C" {
 #include "generic/rte_cpuflags.h"
 
 /* software based registers */
-enum cpu_register_t {
+enum cpu_register_t __RTE_REGISTER_UNDERLYING_TYPE {
        REG_DUMMY = 0
 };
 
 /**
  * Enumeration of all CPU features supported
  */
-enum rte_cpu_flag_t {
+enum rte_cpu_flag_t __RTE_CPUFLAG_UNDERLYING_TYPE {
        RTE_CPUFLAG_NUMFLAGS /**< This should always be the last! */
 };
 

diff --git a/lib/librte_eal/common/include/arch/x86/rte_cpuflags.h b/lib/librte_eal/common/include/arch/x86/rte_cpuflags.h
index dd56553..df1834c 100644 (file)
--- a/lib/librte_eal/common/include/arch/x86/rte_cpuflags.h
+++ b/lib/librte_eal/common/include/arch/x86/rte_cpuflags.h
@@ -45,7 +45,7 @@ extern "C" {
 
 #include "generic/rte_cpuflags.h"
 
-enum rte_cpu_flag_t {
+enum rte_cpu_flag_t __RTE_CPUFLAG_UNDERLYING_TYPE {
        /* (EAX 01h) ECX features*/
        RTE_CPUFLAG_SSE3 = 0,               /**< SSE3 */
        RTE_CPUFLAG_PCLMULQDQ,              /**< PCLMULQDQ */
@@ -150,7 +150,7 @@ enum rte_cpu_flag_t {
        RTE_CPUFLAG_NUMFLAGS,               /**< This should always be the last! */
 };
 
-enum cpu_register_t {
+enum cpu_register_t __RTE_REGISTER_UNDERLYING_TYPE {
        RTE_REG_EAX = 0,
        RTE_REG_EBX,
        RTE_REG_ECX,

diff --git a/lib/librte_eal/common/include/generic/rte_cpuflags.h b/lib/librte_eal/common/include/generic/rte_cpuflags.h
index 61c4db1..5352cbc 100644 (file)
--- a/lib/librte_eal/common/include/generic/rte_cpuflags.h
+++ b/lib/librte_eal/common/include/generic/rte_cpuflags.h
@@ -44,15 +44,23 @@
 #include <errno.h>
 #include <stdint.h>
 
+#ifdef __cplusplus
+#define __RTE_CPUFLAG_UNDERLYING_TYPE  : unsigned int
+#define __RTE_REGISTER_UNDERLYING_TYPE : unsigned int
+#else
+#define __RTE_CPUFLAG_UNDERLYING_TYPE
+#define __RTE_REGISTER_UNDERLYING_TYPE
+#endif
+
 /**
  * Enumeration of all CPU features supported
  */
-enum rte_cpu_flag_t;
+enum rte_cpu_flag_t __RTE_CPUFLAG_UNDERLYING_TYPE;
 
 /**
  * Enumeration of CPU registers
  */
-enum cpu_register_t;
+enum cpu_register_t __RTE_REGISTER_UNDERLYING_TYPE;
 
 typedef uint32_t cpuid_registers_t[4];