This basic tutorial shows you how to compile and run a very basic Elektra application. For this tutorial we assume that you installed Elektra and CMake on your machine. We also assume that you work a Unix based OS like Linux or macOS.
- Create a folder called
Hello
somewhere on your disk
- Copy the file
examples/helloElektra.c
to the folder Hello
you just created
- Save a file with the following content
cmake_minimum_required(VERSION 3.0)
find_package(Elektra REQUIRED)
if (ELEKTRA_FOUND)
message (STATUS "Elektra ${ELEKTRA_VERSION} found")
include_directories (${ELEKTRA_INCLUDE_DIR})
add_executable (hello helloElektra.c)
target_link_libraries (hello ${ELEKTRA_LIBRARIES})
else (ELEKTRA_FOUND)
message (FATAL_ERROR "Elektra not found")
endif (ELEKTRA_FOUND)
as CMakeLists.txt
in the folder Hello
.
- Open a shell and change into the directory
Hello
- Create a build directory inside
Hello
, change into the build directory, and run Cmake:
mkdir build
cd build
cmake ..
. If everything worked until now, then CMake should print messages that look something like this:
-- The C compiler identification is AppleClang 8.1.0.8020042
-- The CXX compiler identification is AppleClang 8.1.0.8020042
-- Check for working C compiler: usr/bin/cc
-- Check for working C compiler: usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: usr/bin/c++
-- Check for working CXX compiler: usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Elektra 0.9.2 found
-- Configuring done
-- Generating done
-- Build files have been written to: Hello/build
- Now it’s time to build your application. For that step run
make
inside the folder Hello/build
:
. If the last step completed successfully, then the build directory now contains the application hello
.
- You can now run your Elektra application by calling
./hello
inside the build directory. The output of the application should look something like this:
Open key database
Retrieve key set
Number of key-value pairs: 0
Add key user/test/hello
Number of key-value pairs: 1
hello, elektra
Delete key-value pairs inside memory
Close key database
- You can now change the content of
helloElektra.c
. If you want to compile and execute the updated code, then repeat steps 6 and 7.