I want to include spdlog into one of my project. It is a header only library. The project that i am building is using cmake. Currently i am using
include_directories('src/logger/spdlog/')
in cmake and including the library as
#include <spdlog/spdlog.h>
in logs.h inside logger folder. I am getting fatal error no such file or directory. What is the correct way to include the same library in my application.
You are probably off one directory. Try either
include_directories("src/logger")
in the CMakeLists.txt
, or
#include <spdlog.h>
in the source code.
Cmake provides interface library specifically for "header-only library". I would suggest to do the following:
third-party\spdlog\include
include
directory with the name spdlog
third-party\\spdlog\\CMakeLists.txt
with the following contentfind_package(Threads REQUIRED)
add_library(${TARGET_LOGGER} INTERFACE)
# add_library(spdlog::spdlog_header_only ALIAS ${TARGET_LOGGER})
target_include_directories(${TARGET_LOGGER} INTERFACE "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
"$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
target_link_libraries(${TARGET_LOGGER} INTERFACE Threads::Threads)
target_link_libraries(${TARGET_PROJECT} LINK_PUBLIC ${TARGET_LOGGER})
. Also don't forget toadd_subdirectory(
third-party\spdlog
)
Then, in your project, you can use #include "spdlog/spdlog.h"
to include the library
First, don't use single quotes '
but double quotes "
or just plain strings if they don't contain spaces.
I would advice you to use find_path
instead of adding includes directly. There you can add PATH_SUFFIXES
. You get a message during configuration if the header is not found, which makes it easier to spot errors.
Documentation: https://cmake.org/cmake/help/v3.6/command/find_path.html
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