user@user-pc:~/Downloads/oomd-memory_reclaim_stat$ meson build && ninja -C build
The Meson build system
Version: 0.49.0
Source dir: /home/user/Downloads/oomd-memory_reclaim_stat
Build dir: /home/user/Downloads/oomd-memory_reclaim_stat/build
Build type: native build
Project name: oomd
Project version: 0.1.0
Native C++ compiler: c++ (gcc 8.3.0 "c++ (Ubuntu 8.3.0-6ubuntu1) 8.3.0")
Build machine cpu family: x86_64
Build machine cpu: x86_64
Found pkg-config: /usr/bin/pkg-config (0.29.1)
Dependency jsoncpp found: YES 1.7.4
Dependency threads found: YES 
Found CMake: /usr/bin/cmake (3.13.4)
Dependency libsystemd found: NO (tried pkgconfig and cmake)
Dependency GTest found: NO (tried pkgconfig and system)
Dependency GMock found: NO (tried pkgconfig and system)
Build targets in project: 2
Found ninja-1.8.2 at /usr/bin/ninja
ninja: Entering directory `build'
[1/33] Compiling C++ object 'oomd@sha/OomdContext.cpp.o'.
FAILED: oomd@sha/OomdContext.cpp.o 
c++ -Ioomd@sha -I. -I.. -I../include -I../util -I../ -I../.. -I/usr/include/jsoncpp -fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wnon-virtual-dtor -g -fPIC -pthread -std=c++17 -g -rdynamic  -MD -MQ 'oomd@sha/OomdContext.cpp.o' -MF 'oomd@sha/OomdContext.cpp.o.d' -o 'oomd@sha/OomdContext.cpp.o' -c ../OomdContext.cpp
../OomdContext.cpp:18:10: fatal error: oomd/OomdContext.h: No such file or directory
 #include "oomd/OomdContext.h"
          ^~~~~~~~~~~~~~~~~~~~
compilation terminated.
[2/33] Compiling C++ object 'oomd@sha/Log.cpp.o'.
FAILED: oomd@sha/Log.cpp.o 
c++ -Ioomd@sha -I. -I.. -I../include -I../util -I../ -I../.. -I/usr/include/jsoncpp -fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wnon-virtual-dtor -g -fPIC -pthread -std=c++17 -g -rdynamic  -MD -MQ 'oomd@sha/Log.cpp.o' -MF 'oomd@sha/Log.cpp.o.d' -o 'oomd@sha/Log.cpp.o' -c ../Log.cpp
../Log.cpp:18:10: fatal error: oomd/Log.h: No such file or directory
 #include "oomd/Log.h"
          ^~~~~~~~~~~~
compilation terminated.
[3/33] Compiling C++ object 'oomd@sha/Oomd.cpp.o'.
FAILED: oomd@sha/Oomd.cpp.o 
c++ -Ioomd@sha -I. -I.. -I../include -I../util -I../ -I../.. -I/usr/include/jsoncpp -fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wnon-virtual-dtor -g -fPIC -pthread -std=c++17 -g -rdynamic  -MD -MQ 'oomd@sha/Oomd.cpp.o' -MF 'oomd@sha/Oomd.cpp.o.d' -o 'oomd@sha/Oomd.cpp.o' -c ../Oomd.cpp
../Oomd.cpp:18:10: fatal error: oomd/Oomd.h: No such file or directory
 #include "oomd/Oomd.h"
          ^~~~~~~~~~~~~
compilation terminated.
ninja: build stopped: subcommand failed.