Abseil is included as a submodule in clickhouse-cpp. You should just clone the clickhouse-cpp repo recursively, with submodules:

git clone --recursive https://github.com/ClickHouse/clickhouse-cpp.git

Can't find no .gitmodules in a root directory

Looks like git clone --recursive does not help. /usr/local/include/ does not contain contrtib/absl

(base) [guyos@tc build]$ sudo make install
[  5%] Built target lz4-lib
[  8%] Built target absl-lib
[ 11%] Built target cityhash-lib
[ 55%] Built target clickhouse-cpp-lib-static
[100%] Built target clickhouse-cpp-lib
Install the project...
-- Install configuration: "Release"
-- Installing: /usr/local/lib/libclickhouse-cpp-lib.so
-- Installing: /usr/local/lib/libclickhouse-cpp-lib-static.a
-- Installing: /usr/local/include/clickhouse/block.h
-- Installing: /usr/local/include/clickhouse/client.h
-- Installing: /usr/local/include/clickhouse/error_codes.h
-- Installing: /usr/local/include/clickhouse/exceptions.h
-- Installing: /usr/local/include/clickhouse/protocol.h
-- Installing: /usr/local/include/clickhouse/query.h
-- Installing: /usr/local/include/clickhouse/base/buffer.h
-- Installing: /usr/local/include/clickhouse/base/coded.h
-- Installing: /usr/local/include/clickhouse/base/compressed.h
-- Installing: /usr/local/include/clickhouse/base/input.h
-- Installing: /usr/local/include/clickhouse/base/output.h
-- Installing: /usr/local/include/clickhouse/base/platform.h
-- Installing: /usr/local/include/clickhouse/base/singleton.h
-- Installing: /usr/local/include/clickhouse/base/socket.h
-- Installing: /usr/local/include/clickhouse/base/string_utils.h
-- Installing: /usr/local/include/clickhouse/base/string_view.h
-- Installing: /usr/local/include/clickhouse/base/wire_format.h
-- Installing: /usr/local/include/clickhouse/columns/array.h
-- Installing: /usr/local/include/clickhouse/columns/column.h
-- Installing: /usr/local/include/clickhouse/columns/date.h
-- Installing: /usr/local/include/clickhouse/columns/decimal.h
-- Installing: /usr/local/include/clickhouse/columns/enum.h
-- Installing: /usr/local/include/clickhouse/columns/factory.h
-- Installing: /usr/local/include/clickhouse/columns/ip4.h
-- Installing: /usr/local/include/clickhouse/columns/ip6.h
-- Installing: /usr/local/include/clickhouse/columns/itemview.h
-- Installing: /usr/local/include/clickhouse/columns/lowcardinality.h
-- Installing: /usr/local/include/clickhouse/columns/nullable.h
-- Installing: /usr/local/include/clickhouse/columns/numeric.h
-- Installing: /usr/local/include/clickhouse/columns/string.h
-- Installing: /usr/local/include/clickhouse/columns/tuple.h
-- Installing: /usr/local/include/clickhouse/columns/utils.h
-- Installing: /usr/local/include/clickhouse/columns/uuid.h
-- Installing: /usr/local/include/clickhouse/types/type_parser.h
-- Installing: /usr/local/include/clickhouse/types/types.h
(base) [guyos@tc build]$ 

/usr/local/include/ does not contain contrtib/absl

/usr/local/include/ should not contain contrtib/absl. The goal is to build clickhouse-cpp, and the output you posted shows that it was successfully built and installed.

yes, it is successfully installed but can't be used.Try to run your example after fresh sudo make install

What do you mean it can't be used? How are you trying to use it exactly?

git clone --recursive https://github.com/ClickHouse/clickhouse-cpp.git
cd clickhouse-cpp/
mkdir build
cd build/
cmake -DCMAKE_BUILD_TYPE=Release ..
make -j8
sudo make install

This is my test project:

git clone https://github.com/kkonevets/test_clickhouse_cpp.git
cd test_clickhouse_cpp
mkdir build
cd build/
cmake -DCMAKE_BUILD_TYPE=Release ..
make

And this is what I get:

[guyos@tc build]$ make
Scanning dependencies of target main
[ 50%] Building CXX object CMakeFiles/main.dir/main.cpp.o
In file included from /usr/local/include/clickhouse/columns/column.h:5,
                 from /usr/local/include/clickhouse/block.h:3,
                 from /usr/local/include/clickhouse/query.h:3,
                 from /usr/local/include/clickhouse/client.h:3,
                 from /home/guyos/Documents/test_clickhouse_cpp/main.cpp:1:
/usr/local/include/clickhouse/types/types.h:3:10: fatal error: absl/numeric/int128.h: No such file or directory
    3 | #include "absl/numeric/int128.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/main.dir/build.make:82: CMakeFiles/main.dir/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:95: CMakeFiles/main.dir/all] Error 2
make: *** [Makefile:103: all] Error 2

You have 2 options:

• install abseil in your system
• add clickhouse-cpp as a submodule in your repo and add it as a subproject in your cmake configs, and then link with clickhouse-cpp library in cmake. That will bring the internal abseil library to your project as a transitive dependency.

The first option will not work, because you make a relative include #include "absl/numeric/int128.h",
something like #include <absl/numeric/int128.h> would work. The second option is not convenient, I don't want to grow my code base unnecessarily.

P.S.: now I got the impression about the library :)

#include "absl/numeric/int128.h" should still be able to locate the system-wide installed abseil.
You can also try an older version of sources, the v1.4.1 tag - it should be free of abseil dependency.

Yes, I confirm that #include "absl/numeric/int128.h" will work if one sets CMAKE_PREFIX_PATH to abseil install path. But then in my opinion directorycontrib/absl is redundant and confuses a user and it would be nice to add info about abseil installation option to a README.

Thanks for your input. If you have any specific improvement on you mind, feel free to open a PR with proposed changes. Meanwhile, I am sure the maintainers will look into improving this at some point.

i am having the same problem. What should I do? can you help me

@kkonevets can you help me solve your problem ?

@kkonevets can you help me solve your problem ?

Didn't try to compile the fresh version of the code, as I wrote set CMAKE_PREFIX_PATH to abseil install path and it should work

@kkonevets
I was able to build but I couldn't run
i run the code like this -> g++ -std=c++17 example.cpp , Do I need to give a different parameter?

yes, try g++ -I /path/to/abseil -std=c++17 example.cpp

Why you are not able to run the example if you could build it? @frkn4129
g++ -std=c++17 example.cpp - this is a build procedure, not a run. To run you use an executable that you get from g++, do not confuse this things

i can't understand
my code :
#include <clickhouse/client.h>

using namespace clickhouse;

/// Initialize client connection.
Client client(ClientOptions().SetHost("localhost"));
.
.
.

i run -> g++ -I /usr/local/include/absl -std=c++17 deneme.cpp
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o: in function _start': (.text+0x24): undefined reference to main'
/usr/bin/ld: /tmp/ccD9lgR9.o: in function __static_initialization_and_destruction_0(int, int)': deneme.cpp:(.text+0x50): undefined reference to clickhouse::NetrworkInitializer::NetrworkInitializer()'
/usr/bin/ld: deneme.cpp:(.text+0xca): undefined reference to clickhouse::Client::Client(clickhouse::ClientOptions const&)' /usr/bin/ld: deneme.cpp:(.text+0x10c): undefined reference to clickhouse::Client::~Client()'
collect2: error: ld returned 1 exit status
this error. @kkonevets

you should also link with ClickHouse lib, g++ -Ldir -lLIBRARY -std=c++17 deneme.cpp

read this

i can try g++ -L/usr/local/lib -lclickhouse-cpp-lib -I /usr/local/include/absl -std=c++17 deneme.cpp but again this error

/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o: in function _start': (.text+0x24): undefined reference to main'
/usr/bin/ld: /tmp/cctXGpYn.o: in function __static_initialization_and_destruction_0(int, int)': deneme.cpp:(.text+0x50): undefined reference to clickhouse::NetrworkInitializer::NetrworkInitializer()'
/usr/bin/ld: deneme.cpp:(.text+0xca): undefined reference to clickhouse::Client::Client(clickhouse::ClientOptions const&)' /usr/bin/ld: deneme.cpp:(.text+0x10c): undefined reference to clickhouse::Client::~Client()'
collect2: error: ld returned 1 exit status

First of all, why do you use sudo to compile? Then, you don't need -L/usr/local/lib because /usr/local/lib is a standard lookup dir. Then looks like you don't have a main function in your example or it is misspelled.
I guess this is not a place to ask questions like this, go ask stack overflow, your questions have nothing related to current issue.