[mosh-users] why i failed to build mosh? i have installed protobuf, but configure said it cannot find it, why?

[wowmailman]

i have tried lots of options, and all failed to build mosh.
the main part of error message is as follows:


./configure CFLAGS=-I/home/bigforest/ins_t/include LDFLAGS=-L/home/bigforest/ins_t/lib --prefix=$HOME/ins_t
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking for ranlib... ranlib
checking for protoc... no
configure: error: cannot find protoc, the Protocol Buffers compiler




./configure --libdir=$HOME/ins_t/lib --includedir=$HOME/ins_t/include   failed with the same error
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