protocol buffers - protobuf common.h "No such file" -

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i trying install caffe, , running frustrating error. when run make following:

cxx .build_release/src/caffe/proto/caffe.pb.cc in file included .build_release/src/caffe/proto/caffe.pb.cc:5:0: .build_release/src/caffe/proto/caffe.pb.h:9:42: fatal error: google/protobuf/stubs/common.h: no such file or directory compilation terminated. make: *** [.build_release/src/caffe/proto/caffe.pb.o] error 1

i using google protocol buffer 2.6.1 (https://developers.google.com/protocol-buffers/docs/downloads), , have indeed added directory path. common.h file there in directory (i see own eyes), somehow unable detect it. have no clue do, , solutions this issue don't seem work me.

any insight appreciated. suspect neglecting step somewhere, rather new linux.

thank much.

path tells shell search commands. not tell compiler search headers. tell compiler find headers in particular directory, need use -i flag. example:

g++ -i/path/to/protobuf/include -c my-source.cc

you need convince build system add flag compiler command-line. reasonable build systems have way this, details vary. autoconf can specify when run configure:

./configure cxxflags=-i/path/to/protobuf/include

for cmake think can (not tested):

cmake -dcmake_cxx_flags=-i/path/to/protobuf/include

alternatively, not have problem if installed protobuf standard location -- either /usr or /usr/local (hence placing headers in /usr/include/google/protobuf or /usr/local/include/google/protobuf).

also note linux distributions have protobuf package, , should use rather installing protobuf source code. need -dev or -devel package in order headers. on debian/ubuntu:

sudo apt-get install libprotobuf-dev protobuf-compiler

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