# pkgconfig

**Repository Path**: dong2/pkgconfig

## Basic Information

- **Project Name**: pkgconfig
- **Description**: Makefile cmake pkgconfig
- **Primary Language**: C
- **License**: GPL-3.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-07-03
- **Last Updated**: 2021-07-03

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# pkgconfig

opencv example: Makefile cmake pkgconfig

#### build.sh

```
cmake ../ \
-DCMAKE_C_COMPILER=mips-linux-gnu-gcc \
-DCMAKE_CXX_COMPILER=mips-linux-gnu-g++ \
-DOPENCV_FORCE_3RDPARTY_BUILD=ON \
-DBUILD_ZLIB=ON -DWITH_GTK=OFF -DWITH_GTK=OFF \
-DWITH_GTK_2_X=OFF -DWITH_CUDA=OFF -DWITH_IPP=OFF \
-DWITH_OPENCL=OFF -DWITH_OPENCLAMDBLAS=OFF \
-DWITH_QUIRC=OFF -DWITH_OPENCLAMDFFT=OFF \
-DWITH_1394=OFF -DWITH_FFMPEG=OFF -DWITH_WEBP=OFF \
-DWITH_TIFF=OFF -DWITH_OPENEXR=OFF -DWITH_PNG=OFF \
-DWITH_PROTOBUF=OFF -DWITH_GSTREAMER=OFF -DWITH_IMGCODEC_SUNRASTER=OFF \
-DBUILD_SHARED_LIBS=OFF -DBUILD_opencv_ts=OFF \
-DBUILD_opencv_shape=OFF -DBUILD_opencv_stitching=OFF \
-DBUILD_opencv_apps=OFF -DBUILD_opencv_calib3d=OFF \
-DBUILD_opencv_dnn=OFF -DBUILD_opencv_features2d=OFF \
-DBUILD_opencv_flann=OFF -DBUILD_opencv_highgui=OFF \
-DBUILD_opencv_ml=OFF -DBUILD_opencv_objdetect=OFF \
-DBUILD_opencv_photo=OFF -DBUILD_opencv_video=OFF \
-DBUILD_opencv_videoio=OFF -DBUILD_opencv_videostab=OFF \
-DCMAKE_BUILD_TYPE=RELEASE \
-DCMAKE_INSTALL_PREFIX=../output \
-DCMAKE_C_FLAGS=-m64 -DCMAKE_CXX_FLAGS=-m64 \
-DCMAKE_CXX_FLAGS="-s -Os" -DCMAKE_C_FLAGS="-s -Os"

```

#### opencv.pc

```
# Package Information for pkg-config

prefix=/home/zhoudd/2021/202107/cv/opencv-3.4.9/output
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir_old=${prefix}/include/opencv
includedir_new=${prefix}/include

Name: OpenCV
Description: Open Source Computer Vision Library
Version: 3.4.9
Libs: -L${exec_prefix}/lib -lopencv_imgcodecs -lopencv_imgproc -lopencv_core
Libs.private: -L${exec_prefix}/share/OpenCV/3rdparty/lib -lzlib -littnotify -llibjpeg-turbo -llibjasper -ldl -lm -lpthread -lrt
Cflags: -I${includedir_old} -I${includedir_new}

```

#### .bashrc

```
export LD_LIBRARY_PATH=/home/zhoudd/2021/202107/cv/opencv-3.4.9/output/lib:$LD_LIBRARY_PATH
export PKG_CONFIG_PATH=/home/zhoudd/2021/202107/cv/opencv-3.4.9/output/lib/pkgconfig:$PKG_CONFIG_PATH
```

#### Makefile
cd opencv-3.4.9/samples/cpp/example_cmake
```
CXX = mips-linux-gnu-g++

CXXFLAGS += -c -Wall $(shell pkg-config --cflags opencv)
LDFLAGS += $(shell pkg-config --libs --static opencv)

all: opencv_example

opencv_example: example.o; $(CXX) $< -o $@ $(LDFLAGS)

%.o: %.cpp; $(CXX) $< -o $@ $(CXXFLAGS)

clean: ; rm -f example.o opencv_example

```

#### cmake
cd opencv-3.4.9/samples/cpp/example_cmake

```
# cmake needs this line
cmake_minimum_required(VERSION 2.8)

# Define project name
project(opencv_example_project)

# Find OpenCV, you may need to set OpenCV_DIR variable
# to the absolute path to the directory containing OpenCVConfig.cmake file
# via the command line or GUI
find_package(OpenCV REQUIRED)

# If the package has been found, several variables will
# be set, you can find the full list with descriptions
# in the OpenCVConfig.cmake file.
# Print some message showing some of them
message(STATUS "OpenCV library status:")
message(STATUS "    version: ${OpenCV_VERSION}")
message(STATUS "    libraries: ${OpenCV_LIBS}")
message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")

if(CMAKE_VERSION VERSION_LESS "2.8.11")
  # Add OpenCV headers location to your include paths
  include_directories(${OpenCV_INCLUDE_DIRS})
endif()

# Declare the executable target built from your sources
add_executable(opencv_example example.cpp)

# Link your application with OpenCV libraries
target_link_libraries(opencv_example PRIVATE ${OpenCV_LIBS})

```