Hello all,
I'm trying to load/save protobuf format data directly in R, so writing
a R external function in C++. As visual studio doesn't support this
usage, I have to compile the code with Rtools (which is essentially
mingw and cygwin). However, when I try to compile it, I receive an
error because of including the protobuf header.
C:\t>R CMD SHLIB test.cpp
g++ -I"C:/PROGRA~1/R/R-211~1.1/include" -O2 -Wall -c test.cpp
-o test.o
In file included from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/bits/locale_facets.h:1536,
from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/bits/basic_ios.h:44,
from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/ios:50,
from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/ostream:45,
from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/iterator:70,
from C:/PROGRA~1/R/R-211~1.1/include/google/protobuf/
repeated_field.h:50,
from Person.pb.h:23,
from test.cpp:5:
c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-sjlj/include/c++/bits/
codecvt.h:219:45: error: macro "length" passed 4 arguments, but takes
just 1
test.cpp:108:4: warning: no newline at end of file
In file included from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/bits/locale_facets.h:1536,
from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/bits/basic_ios.h:44,
from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/ios:50,
from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/ostream:45,
from c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-
sjlj/include/c++/iterator:70,
from C:/PROGRA~1/R/R-211~1.1/include/google/protobuf/
repeated_field.h:50,
from Person.pb.h:23,
from test.cpp:5:
c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-sjlj/include/c++/bits/
codecvt.h:218: error: expected ';' before 'const'
c:\rtools\mingw\bin\../lib/gcc/mingw32/4.2.1-sjlj/include/c++/bits/
codecvt.h:222: error: expected `;' before 'int'
In file included from Person.pb.h:24,
from test.cpp:5:
C:/PROGRA~1/R/R-211~1.1/include/google/protobuf/extension_set.h:450:
error: expected identifier before '(' token
C:/PROGRA~1/R/R-211~1.1/include/google/protobuf/extension_set.h:450:
error: expected `)' before ',' token
test.cpp: In function 'void cpp_test(int*, double*, double*, int*,
double*, double*)':
make: *** [test.o] Error 1
The code in codecvt.h:219:45 is :
int
length(state_type& __state, const extern_type* __from,
const extern_type* __end, size_t __max) const
{ return this->do_length(__state, __from, __end, __max); }
The code in include/google/protobuf/extension_set.h:450 is:
int GetSize() const;
void Free();
int SpaceUsedExcludingSelf() const;
I'm using windows xp sp3, protobuf 2.3.0, g++ (GCC) 4.2.1-sjlj
(mingw32-2), R version 2.11.1.
I suspect the reason that protobuf is just not compatible with g++
version 4.2.1 or the g++ in Rtools is somewhat downgraded version of
full g++, thus does not match with protobuf.
Does anyone have same issues / know how to fix this? Thank you!
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