Hi there,
Lets start with some background. I'm building on an x86_64 linux server,
and the target platform is powerpc. So far I have generated the cpp files
from my proto files (on the linux machine using protoc) and now im trying
to compile the cpp code for powerpc platform.
Im using the "powerpc-eabi-g++" compiler, and the problem is that as soon
as i start compiling I get this error:-
In file included from
/home/esyishh/protobuf-2.5.0/src/google/protobuf/stubs/atomicops.h:59,
from
/home/esyishh/protobuf-2.5.0/src/google/protobuf/stubs/once.h:81,
from list_ue.pb.cc:10:
/home/esyishh/protobuf-2.5.0/src/google/protobuf/stubs/platform_macros.h:61:2:
error: #error Host architecture was not detected as supported by protobuf
When I check the contents of platform_macros.h file, it has the following
platforms supported:-
#if defined(_M_X64) || defined(__x86_64__)
#define GOOGLE_PROTOBUF_ARCH_X64 1
#define GOOGLE_PROTOBUF_ARCH_64_BIT 1
#elif defined(_M_IX86) || defined(__i386__)
#define GOOGLE_PROTOBUF_ARCH_IA32 1
#define GOOGLE_PROTOBUF_ARCH_32_BIT 1
#elif defined(__QNX__)
#define GOOGLE_PROTOBUF_ARCH_ARM_QNX 1
#define GOOGLE_PROTOBUF_ARCH_32_BIT 1
#elif defined(__ARMEL__)
#define GOOGLE_PROTOBUF_ARCH_ARM 1
#define GOOGLE_PROTOBUF_ARCH_32_BIT 1
#elif defined(__MIPSEL__)
#define GOOGLE_PROTOBUF_ARCH_MIPS 1
#define GOOGLE_PROTOBUF_ARCH_32_BIT 1
#elif defined(__pnacl__)
#define GOOGLE_PROTOBUF_ARCH_32_BIT 1
#elif defined(__ppc__)
#define GOOGLE_PROTOBUF_ARCH_PPC 1
#define GOOGLE_PROTOBUF_ARCH_32_BIT 1
#else
#error Host architecture was not detected as supported by protobuf
#endif
So I get the idea that ppc *is *supported. Here is what my compiler says:-
-> echo | powerpc-eabi-g++ -E -dM - | grep -i ppc
#define _ARCH_PPC 1
#define __PPC__ 1
#define __PPC 1
#define PPC 1
I thought that it was simply a problem with lowercase Vs uppercase so I
tried to modify the platform_macros.h file and now it contains something
like this:-
#elif defined(__PPC__) //changed ppc from lower case to uppercase to match
the compiler
#define GOOGLE_PROTOBUF_ARCH_PPC 1
#define GOOGLE_PROTOBUF_ARCH_32_BIT 1
and then the compilation goes further but then I end up into some missing
header files issues. Before I try to dig deeper, I wanted to get some
advice from you guys.
Do you think this problem is related to the fact that I didnt compile
protocol buffer libraries for powerpc & instead I just compiled them for
the build host environment (x86_64).
Would compiling protocol buffers for powerpc architecture help? (I tried
doing that but ran once again into 'undefined reference' issues, so
probably i will need to tweak the makefile a bit).
Regards,
Safi
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