Unable to Compile Protobuf for QNX aarch64

[bosssaurav]

What version of protobuf and what language are you using?
Version: master
Language: C++

What operating system (Linux, Windows, ...) and version?
Linux x86
Target OS : QNX aarch64

What runtime / compiler are you using (e.g., python version or gcc version)
CC=ntoaarch64-g++-5.4.0
CXX=ntoaarch64-gcc-5.4.0

What did you do?
Try to cross- compile protobuf for aarch64
Steps to reproduce the behavior:

1. Command run : ../configure --host=aarch64 --prefix=$HOME/google/qnx_arm64 --with-protoc=$HOME/google/x86_64_pb_install/bin/protoc

Executed Successfully.

2. Command 2: make

   See error

What did you expect to see
> Protobuf libraries for aarch64 qnx
What did you see instead?

libtool: compile: ntoaarch64-g++-5.4.0 -std=c++11 -DHAVE_CONFIG_H -I. -I../../src -I.. -DHAVE_PTHREAD=1 -DHAVE_ZLIB=1 -Wall -Wno-sign-compare -O2 -g -DNDEBUG -MT google/protobuf/io/zero_copy_stream_impl.lo -MD -MP -MF google/protobuf/io/.deps/zero_copy_stream_impl.Tpo -c ../../src/google/protobuf/io/zero_copy_stream_impl.cc -o google/protobuf/io/zero_copy_stream_impl.o
../../src/google/protobuf/io/zero_copy_stream_impl.cc: In function 'int google::protobuf::io::{anonymous}::close_no_eintr(int)':
../../src/google/protobuf/io/zero_copy_stream_impl.cc:75:22: error: 'close' was not declared in this scope
result = close(fd);
^
../../src/google/protobuf/io/zero_copy_stream_impl.cc: In member function 'virtual int google::protobuf::io::FileInputStream::CopyingFileInputStream::Read(void*, int)':
../../src/google/protobuf/io/zero_copy_stream_impl.cc:147:38: error: 'read' was not declared in this scope
result = read(file_, buffer, size);
^
../../src/google/protobuf/io/zero_copy_stream_impl.cc: In member function 'virtual int google::protobuf::io::FileInputStream::CopyingFileInputStream::Skip(int)':
../../src/google/protobuf/io/zero_copy_stream_impl.cc:162:35: error: 'lseek' was not declared in this scope
lseek(file_, count, SEEK_CUR) != (off_t)-1) {
^
../../src/google/protobuf/io/zero_copy_stream_impl.cc: In member function 'virtual bool google::protobuf::io::FileOutputStream::CopyingFileOutputStream::Write(const void*, int)':
../../src/google/protobuf/io/zero_copy_stream_impl.cc:250:77: error: 'write' was not declared in this scope
bytes = write(file_, buffer_base + total_written, size - total_written);
^
../../src/google/protobuf/io/zero_copy_stream_impl.cc: In member function 'virtual int google::protobuf::io::FileInputStream::CopyingFileInputStream::Skip(int)':
../../src/google/protobuf/io/zero_copy_stream_impl.cc:175:1: warning: control reaches end of non-void function [-Wreturn-type]

Anything else we should know about your project / environment
CC=ntoaarch64-g++-5.4.0
CXX=ntoaarch64-gcc-5.4.0

[TeBoring]

Sorry, I think this is not our officially supported platform. Could you help send a fix?

[journey175]

I got the same question when cross-compile protobuf c++ 3.11.4 for arm-linux,
it describe the error : ./.libs/libprotoc.so : error: undefined reference to 'scc_info_FileDescriptorProto_google_2fprotobuf_2fdescriptor_2eproto', I met the simliar question in other bloack , but it can not fix my question

[bosssaurav]

@TeBoring
Maybe I could find a fix. You should invite me for an interview though ;)

[xuwenping]

@bosssaurav @journey175 I got the same question, I have fixed.

1. imput input configure cmd
   ./configure --prefix=/home/protobuf --host=arm --build=i686-pc-linux CC=/qnx700/host/linux/x86_64/usr/bin/ntoaarch64-gcc CXX=/qnx700/host/linux/x86_64/usr/bin/ntoaarch64-g++ --with-protoc=protoc --enable-shared=yes --enable-static=no
2. modify src/makefile, on 1119 line
   the old content is :
   LTCXXCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CXX $(AM_LIBTOOLFLAGS)
   $(LIBTOOLFLAGS) --mode=compile $(CXX) $(DEFS)
   $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS)
   $(AM_CXXFLAGS) $(CXXFLAGS)
   after modification:
   LTCXXCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CXX $(AM_LIBTOOLFLAGS)
   $(LIBTOOLFLAGS) --mode=compile $(CXX) $(DEFS)
   $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS)
   $(AM_CXXFLAGS) $(CXXFLAGS) -D_XOPEN_SOURCE=500

the reason can see https://stackoverflow.com/questions/5378778/what-does-d-xopen-source-do-mean

[bosssaurav]

@xuwenping
Your method : 👍
Although it generates the protoc of aarch64 type, it does not produce libprotobuf.so.*

In my method :
At the last stage : "it doesnot generate libprotobuf.so.*"

by giving follow error:
libtool: link: /root/Out/ML-examples/opt/qnx700_2/host/linux/x86_64/usr/bin/ntoaarch64-c++-5.4.0 -DHAVE_PTHREAD=1 -Wall -Wno-sign-compare -E -std=c++11 -Wall -pedantic -Wno-sign-compare -o protoc google/protobuf/compiler/main.o ./.libs/libprotobuf.a ./.libs/libprotoc.a /root/google/protobuf-3.5.1/qnx_build/src/.libs/libprotobuf.a
/usr/bin/install -c -m 644 ../../src/google/protobuf/compiler/php/php_generator.h '/root/armnn-devenv/google/qnx_arm64/include/google/protobuf/compiler/php'
ntoaarch64-c++-5.4.0: warning: google/protobuf/compiler/main.o: linker input file unused because linking not done
ntoaarch64-c++-5.4.0: warning: ./.libs/libprotobuf.a: linker input file unused because linking not done
ntoaarch64-c++-5.4.0: warning: ./.libs/libprotoc.a: linker input file unused because linking not done
ntoaarch64-c++-5.4.0: warning: /root/google/protobuf-3.5.1/qnx_build/src/.libs/libprotobuf.a: linker input file unused because linking not done

Any work around this ?

[xuwenping]

@bosssaurav
I have not encountered this error，
I run this command:
./configure CFLAGS='-fPIC' CXXFLAGS='-fPIC' --prefix=/home/xuwenping/qnx700/protobuf --host=aarch64-unknown-nto-qnx7.0.0 --build=i686-pc-linux CC=/home/xuwenping/qnx700/host/linux/x86_64/usr/bin/aarch64-unknown-nto-qnx7.0.0-gcc CXX=/home/xuwenping/qnx700/host/linux/x86_64/usr/bin/aarch64-unknown-nto-qnx7.0.0-g++ CPPFLAGS='-D_XOPEN_SOURCE=500'
then execute: make and make install, can genereate .so and .a

[jtattermusch]

was this fixed by #8637?

[deannagarcia]

Closing due to no response, feel free to reopen if you are still seeing this issue.