Я пытаюсь скомпилировать код cpp, который использует libavcodec:
#include <libavcodec/avcodec.h>
Я перепробовал все варианты
find_package()
с именами типа ffmpeg
, для которых я получаю
CMake Warning at CMakeLists.txt:17 (find_package):
By not providing "Findffmpeg.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "ffmpeg", but
CMake did not find one.
Could not find a package configuration file provided by "ffmpeg" with any
of the following names:
ffmpegConfig.cmake
ffmpeg-config.cmake
Add the installation prefix of "ffmpeg" to CMAKE_PREFIX_PATH or set
"ffmpeg_DIR" to a directory containing one of the above files. If "ffmpeg"
provides a separate development package or SDK, be sure it has been
installed.
Кстати, я сделал sudo apt install -y ffmpeg
до всего этого.
Я компилирую с
add_executable(my_executable ${sources})
Минимальный рабочий пример
CMakeLists.txt
cmake_minimum_required(VERSION 3.1.0)
project(hello)
find_library(AVCODEC_LIBRARY avcodec)
add_executable(hello main.cpp)
target_link_libraries( hello PRIVATE ${AVCODEC_LIBRARY})
main.cpp
#include <iostream>
using namespace std;
int main()
{
cout << "Hello, World!";
return 0;
}
Вывод:
lz@vm:~/mcve$ cmake .
-- The C compiler identification is GNU 7.2.0
-- The CXX compiler identification is GNU 7.2.0
-- 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
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
AVCODEC_LIBRARY
linked by target "hello" in directory /home/lz/mcve
-- Configuring incomplete, errors occurred!
See also "/home/lz/mcve/CMakeFiles/CMakeOutput.log".