[dpdk-dev] Issues with rte_hash_crc.h when compiling with C++

[Pavel Odintsov]

Hello!

Could anybody help me with this issue? :(

In this file widely used enum forward declarations which completely
incompatible with C++ and need some rewrite.

On Wed, Apr 29, 2015 at 3:17 PM, Pavel Odintsov
<pavel.odintsov at gmail.com> wrote:
> Hello!
>
> I have C++ application compiles and works nice. But when I include
> rte_hash_crc.h header everything goes away.
>
>   CC main.o
> In file included from
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/rte_cpuflags.h:46:0,
>                  from
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/rte_hash_crc.h:48,
>                  from /root/interceptor/main.cpp:25:
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/generic/rte_cpuflags.h:50:6:
> error: use of enum ‘rte_cpu_flag_t’ without previous declaration
>  enum rte_cpu_flag_t;
>       ^
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/generic/rte_cpuflags.h:55:6:
> error: use of enum ‘cpu_register_t’ without previous declaration
>  enum cpu_register_t;
>       ^
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/generic/rte_cpuflags.h:79:35:
> error: uninitialized const ‘cpu_feature_table’ [-fpermissive]
>  static const struct feature_entry cpu_feature_table[];
>                                    ^
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/generic/rte_cpuflags.h:64:8:
> note: ‘const struct feature_entry’ has no user-provided default
> constructor
>  struct feature_entry {
>         ^
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/generic/rte_cpuflags.h:65:11:
> note: and the implicitly-defined constructor does not initialize
> ‘uint32_t feature_entry::leaf’
>   uint32_t leaf;    /**< cpuid leaf */
>            ^
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/generic/rte_cpuflags.h:79:53:
> error: storage size of ‘cpu_feature_table’ isn’t known
>  static const struct feature_entry cpu_feature_table[];
>                                                      ^
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/generic/rte_cpuflags.h:101:31:
> error: use of enum ‘rte_cpu_flag_t’ without previous declaration
>  rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature);
>                                ^
> In file included from
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/rte_hash_crc.h:48:0,
>                  from /root/interceptor/main.cpp:25:
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/rte_cpuflags.h:
> In function ‘int rte_cpu_get_flag_enabled(rte_cpu_flag_t)’:
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/rte_cpuflags.h:278:53:
> error: conflicting declaration of C function ‘int
> rte_cpu_get_flag_enabled(rte_cpu_flag_t)’
>  rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature)
>                                                      ^
> In file included from
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/rte_cpuflags.h:46:0,
>                  from
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/rte_hash_crc.h:48,
>                  from /root/interceptor/main.cpp:25:
> /usr/src/dpdk-2.0.0/x86_64-native-linuxapp-gcc/include/generic/rte_cpuflags.h:101:1:
> note: previous declaration ‘int rte_cpu_get_flag_enabled(int)’
>  rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature);
>  ^
> /usr/src/dpdk-2.0.0/mk/internal/rte.compile-pre.mk:145: recipe for
> target 'main.o' failed
> make[1]: *** [main.o] Error 1
> /usr/src/dpdk-2.0.0/mk/rte.extapp.mk:42: recipe for target 'all' failed
> make: *** [all] Error 2
>
> I prepared my environment with this manual:
> http://www.stableit.ru/2015/04/how-to-code-for-dpdk-with-c.html
>
> Could anybody help me with this header file and C++?
>
> --
> Sincerely yours, Pavel Odintsov



-- 
Sincerely yours, Pavel Odintsov