I'm not sure if this would necessarily change anything, but I should 
mention that I'm running all of this through the *Cygwin* application, 
which came with cmake, make, and g++ (which is how I compiled the library 
in teh first place). 

On Tuesday, July 2, 2019 at 5:26:48 PM UTC-7, Ricardo Iglesias wrote:
>
> Good evening. I'm currently attempting to integrate the protocol buffer 
> library into an embedded code project I'm assigned to, which uses Windows 7 
> to flash code onto hardware. 
>
> I have followed this guide <http://goog_1006182188> to installing the 
> protocol buffer libraries/binaries on windows, and believe I am very close 
> to getting my project to compile. Currently, I have the following directory 
> structure:
>
> Desktop
>   install
>     bin
>     include
>     lib
>   ProtoTest
>     data_revised.pb.h
>     data_revised.pb.cc
>     main.cc
>
>
> Where ProtoTest is where the code I want to compile resides, and the 
> *install* folder resulting from the compilation contains the binary for 
> the protobuffer compiler, as well as the includes and libraries. 
>
> I wish to run the following command: 
>
> g++ -std=c++14 -L/cygdrive/c/Users/<username>/Desktop/install/lib/ \
>               -lprotobuf \
>               -I/cygdrive/c/Users/<username>/Desktop/install/include \
>                ProtoTest/data_revised.pb.cc ProtoTest/main.cc
>
>
> However, when I run it, I get errors of this form: 
>  g++ -std=c++14 -L/cygdrive/c/Users/solarcar/Desktop/install/lib/ 
> -lprotobuf -I/cygdrive/c/Users/solarcar/Desktop/install/include ProtoTest/
> data_revised.pb.cc ProtoTest/main.cc
>
> In file included from ProtoTest/data_revised.pb.cc:4:0:
> ProtoTest/data_revised.pb.h:181:8: error: 'void 
> IntTriplet::SerializeWithCachedSizes(google::protobuf::io::CodedOutputStream*)
>  
> const' marked 'final', but is not virtual
>    void SerializeWithCachedSizes(
>         ^~~~~~~~~~~~~~~~~~~~~~~~
> ProtoTest/data_revised.pb.h:183:35: error: 'google::protobuf::uint8* 
> IntTriplet::InternalSerializeWithCachedSizesToArray(google::protobuf::uint8*) 
> const' marked 'final', but is not virtual
>    ::PROTOBUF_NAMESPACE_ID::uint8* InternalSerializeWithCachedSizesToArray(
>    
>
> If I recompile the protocol buffer I'm using, I get slightly different 
> errors:
> /tmp/ccRjenfk.o:data_revised.pb.cc:(.text+0x22): undefined reference to 
> google::protobuf::internal::VerifyVersion(int, int, char const*)
> or
> ...:data_revised.pb.cc:...:undefined reference to 
> "google::protobuf::Message::SpaceUsedLong() const"
>
>
> I'm a bit more lost as to how to fix this more recent error, since I am 
> (hopefully) including the libraries correctly.
>
> Is there any way I can verify the library is indeed being installed 
> correctly? 
>

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