编译自己应用程序，1 在SDK的环境下进行链接编译。 2 知道应用程序需要哪些库文件和头文件，建立自己的工程环境。 这是两种是我自己经过实践摸索过来的。
怎么去快速编译自己应用程序，又不用关心库和头文件？
RKMedia提供了一种媒体处理方案，可支持应用软件快速开发。RKMedia在各模块基础API上做进一步封装，简化了应用开发难度。
自己编写应用程序，可以在buildroot/output/rockchip_rv1126_rv1109/build/rkmedia 这个目录下开发。
先看下这个目录下的CMakeLists.txt文件内容
# rkmedia_vi_venc_rtsp_test
#--------------------------
link_directories(${PROJECT_SOURCE_DIR}/librtsp/)
add_executable(rkmedia_vi_venc_rtsp_test rkmedia_vi_venc_rtsp_test.c ${COMMON_SRC})
add_dependencies(rkmedia_vi_venc_rtsp_test easymedia)
target_link_libraries(rkmedia_vi_venc_rtsp_test easymedia rtsp)
target_include_directories(rkmedia_vi_venc_rtsp_test PRIVATE ${CMAKE_SOURCE_DIR}/include)
install(TARGETS rkmedia_vi_venc_rtsp_test RUNTIME DESTINATION "bin")
.cmake已经帮我们做好了，指定需要的库和头文件，我们只需要照葫芦画瓢就行，
在后面添加想要编译程序
# your_app_rk_test\
....
link_directories(${PROJECT_SOURCE_DIR}/librtsp/)
add_executable(your_app_rk_test your_app_rk_test.c ${COMMON_SRC})
add_dependencies(your_app_rk_test easymedia)
target_link_libraries(your_app_rk_test easymedia rtsp)
target_include_directories(your_app_rk_test PRIVATE ${CMAKE_SOURCE_DIR}/include)
install(TARGETS your_app_rk_test RUNTIME DESTINATION "bin")
.....“cmake .” 生成Makefile文件。
"make " 编译即可得到可执行文件。
接下来，介绍怎么建立自己工程环境，这是今天重点想讲的。
建立自己的工程环境突破口：
cmake编译以后，可以看到CMakeFiles目录生成一些中间文件，着重看flags.make、build.make和link.txt， 这几个文件是重要的突破口。
找到rkmedia\examples\CMakeFiles\rkmedia_vi_vo_test.dir，有对rkmedia_vi_vo_test…c文件编译的依赖描述，编译命令等。
flags.make：主要添加头文件路径，以及预编译选项C_FLAGS
build.make：添加要一起编译的.c文件
link.txt：里面是编译生成可执行文件的命令。
flags.make 经过整理
# CMAKE generated file: DO NOT EDIT!
# Generated by "Unix Makefiles" Generator, CMake Version 3.10
# compile C with kk/bin/arm-linux-gnueabihf-gcc
C_FLAGS = -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DUSE_UPDATEENGINE=ON -DSUCCESSFUL_BOOT=ON -DNDEBUG -Wall -Wextra -Wshadow -ffast-math -fPIC -Werror -g -O0 -ggdb -gdwarf -funwind-tables -rdynamic
C_DEFINES = -DAUDIO_ALGORITHM_ENABLE -DLIBDRM -DRKAIQ
C_INCLUDES = -I/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/build/rkmedia/.
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/a3dlut
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/ablc
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/accm
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/acp
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/adebayer
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/adehaze
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/adpcc
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/ae
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/af
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/agamma
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/ahdr
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/aie
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/alsc
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/anr
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/aorb
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/asd
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/asharp
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos/awb
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/common
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/iq_parser
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/uAPI
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/xcore
-Ikk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/libdrm
-I/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/build/rkmedia/include/easymedia
-I/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/build/rkmedia/include/rkmedia
-I/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/build/rkmedia/include
-isystem kk/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq
只需知道需要用到哪些头文件以及头文件路径。
build.make:
...
examples/rkmedia_vi_vo_test: examples/CMakeFiles/rkmedia_vi_vo_test.dir/rkmedia_vi_vo_test.c.o
examples/rkmedia_vi_vo_test: examples/CMakeFiles/rkmedia_vi_vo_test.dir/common/sample_common_isp.c.o
examples/rkmedia_vi_vo_test: examples/CMakeFiles/rkmedia_vi_vo_test.dir/common/sample_fake_isp.c.o
examples/rkmedia_vi_vo_test: examples/CMakeFiles/rkmedia_vi_vo_test.dir/build.make
examples/rkmedia_vi_vo_test: src/libeasymedia.so.1.0.1
examples/rkmedia_vi_vo_test: /home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libliveMedia.so
examples/rkmedia_vi_vo_test: /home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgroupsock.so
examples/rkmedia_vi_vo_test: /home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libBasicUsageEnvironment.so
examples/rkmedia_vi_vo_test: /home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libUsageEnvironment.so
examples/rkmedia_vi_vo_test: /home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/librkaiq.so
....link.txt，经过整理
/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/bin/arm-linux-gnueabihf-gcc
--sysroot=/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/arm-buildroot-linux-gnueabihf/sysroot
-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -DUSE_UPDATEENGINE=ON -DSUCCESSFUL_BOOT=ON -DNDEBUG -rdynamic
CMakeFiles/rkmedia_vi_vo_test.dir/rkmedia_vi_vo_test.c.o
CMakeFiles/rkmedia_vi_vo_test.dir/common/sample_common_isp.c.o
CMakeFiles/rkmedia_vi_vo_test.dir/common/sample_fake_isp.c.o -o rkmedia_vi_vo_test
-L/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/build/rkmedia/examples/librtsp
-Wl,-rpath,/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/build/rkmedia/examples/librtsp:
/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/build/rkmedia/src:
../src/libeasymedia.so.1.0.1 -ldrm -lrockchip_mpp -lliveMedia -lgroupsock -lBasicUsageEnvironment -lUsageEnvironment -lpthread -lasound -lRKAP_3A -lRKAP_ANR -lRKAP_Common -lv4l2 -lrga -lRKAP_3A -lRKAP_ANR -lRKAP_Common -lv4l2 -lrga -lrknn_runtime -lrknn_api -lrockface -lsqlite3 -lmd_share -lod_share -lrockx
/home/zhao-debug/1126rv/0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/librkaiq.so
这里需要有一个注意就是 --sysroot= ，加入这个选项，编译器会在这个目录的./usr/lib 和 ./usr/include 找对应的库和头文件。
整理，我们大概知道需要用到哪些库以及头文件。
库路径:
sysroot/usr/lib
rkmedia/src
需要的库：
libeasymedia.so.1.0.1
-lUsageEnvironment -lpthread -lasound -lRKAP_3A -lRKAP_ANR
-lRKAP_Common -lv4l2 -lrga -lRKAP_3A -lRKAP_ANR -lRKAP_Common
-lv4l2 -lrga -lrknn_runtime -lrknn_api -lrockface -lsqlite3 -lmd_share
-lod_share -lrockx
/usr/lib/librkaiq.so
额外目标文件:
sample_common_isp.c.o sample_fake_isp.c.o
头文件路径：
sysroot/usr/include
sysroot/usr/include/rkaiq/common
sysroot/usr/include/rkaiq/iq_parser
sysroot/usr/include/rkaiq/uAPI
sysroot/usr/include/rkaiq/xcore
sysroot/usr/include/libdrm
rkmedia/include/easymedia
include/rkmedia
rkmedia/include
编译器路径是
buildroot/output/rockchip_rv1126_rv1109/host/bin/arm-linux-gnueabihf-gcc大部分库路径和头文件在下面目录的lib和库
0.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host/arm-buildroot-linux-gnueabihf/sysroot简单粗暴点，直接打包压缩.2.20_SDK/buildroot/output/rockchip_rv1126_rv1109/host目录
tar zcvf host.tar.gz host
将压缩包放在/opt
sudo mv host.tar.gz /opt
//解压
tar zxvf host.tar.gz建立工程：
Makefile 内容
hide := @
ECHO := echo
G++ := /opt/host/bin/arm-linux-gnueabihf-g++
#/opt/rv1126_gcc/prebuilts/gcc/linux-x86/arm/gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf/bin/arm-linux-gnueabihf-g++
#/opt/host/bin/arm-linux-gnueabihf-g++
#/opt/host/bin/arm-linux-gnueabihf-g++
#--sysroot=/opt/host/arm-buildroot-linux-gnueabihf/sysroot
SYSROOT := --sysroot=/opt/host/arm-buildroot-linux-gnueabihf/sysroot
SOURCEAPP := rkmedia_vi_venc_test.cpp
LINKAPP := sample_common_isp.c
TARGETAPP := rkmedia_vi_venc_test
CFLAGS := -I./include/rkmedia \
-I./common \
-I/opt/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/easymedia \
-I/opt/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/common \
-I/opt/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/xcore \
-I/opt/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/uAPI \
-I/opt/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/algos \
-I/opt/host/arm-buildroot-linux-gnueabihf/sysroot/usr/include/rkaiq/iq_parser \
LIB_FILES :=
LD_FLAGS := -leasymedia -ldrm -lrockchip_mpp -lpthread -lasound \
-lRKAP_3A -lRKAP_ANR -lRKAP_Common -lv4l2 \
-lv4lconvert -lrga -lrknn_api -lrockface \
-lsqlite3 -lmd_share -lod_share -lrockx -lrkaiq \
DCFLAGS += -DRKAIQ
all:
$(G++) $(SYSROOT) $(DCFLAGS) $(SOURCEAPP) $(LINKAPP) -o $(TARGETAPP) $(CFLAGS) $(LIB_FILES) $(LD_FLAGS)
@echo $(ADD_CO)
$(hide)$(ECHO) "Build Done ..."
make编译
可以通过交叉编译器来查看可执行文件依赖哪些文件？
使用工具查看可执行文件 依赖哪些库文件，因为这里编译的可执行文件是arm，所以要选择交叉编译工具，prebuilts/gcc/linux-x86/arm/gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf/bin/arm-linux-gnueabihf-readelf
工程模板 rv1126工程模板
需要sdk，关注 小昭debug
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