thepresent 发布的帖子

@ajian 没看到具体的错误信息。这是我根据文档修改的程序包，你对比一下。 lv2048.tar.gz

@ajian 两个Makefile都改了吗？如果已经都改了的话make clean一下再试试。如果还不行就上传一下错误截图看一下

@ajian 是不是直接复制的文档中的Makefile的内容，Makefile要求缩进必须是tab，不能是空格。你把makefile中的缩进全部删掉，然后改成tab试试。像下面这里：

%.o: %.c
	@$(CC)  $(CFLAGS) -c $< -o $@
	@echo "CC $<"

@wxid_disxysjskla
@wxid_disxysjskla 大佬，我下载了你的新的安装包，编译的时候提示

Package eyesee-mpp-external is missing dependencies for the following libraries:
libc.so.6
libm.so.6

我参考https://www.cnblogs.com/rockyching2009/p/10246438.html这里，修改了/openwrt/package/allwinner/eyesee-mpp/external/Makefile:

define Package/$(PKG_NAME)/install
        $(INSTALL_DIR) $(1)/usr/lib/eyesee-mpp
        $(INSTALL_DIR) $(1)/usr/bin
        $(CP) $(PKG_BUILD_DIR)/libc.so.6 $(1)
        $(CP) $(PKG_BUILD_DIR)/libm.so.6 $(1)
        ...

define Build/Prepare
        mkdir -p $(PKG_BUILD_DIR)
        if [ -d $(SRC_COMPILE_DIR) ]; then \
                rm -rf $(SRC_COMPILE_DIR); \
        fi
        cp -rf $(SRC_CODE_DIR) $(SRC_COMPILE_DIR)
        cp libc.so.6  $(PKG_BUILD_DIR)
        cp libm.so.6  $(PKG_BUILD_DIR)
endef

修改了之后可以编译了。然后又出现了下面这个错误

make[5]: Entering directory '.../out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libADAS'
make[5]: *** No rule to make target 'library/musl/libADAS.a', needed by 'out/libADAS.a'.  Stop.

我把编译配置里改成编译动态库之后，可以编译成功了。不过我选择编译mpp sample的时候，没有生成ipk。
麻烦问一下，
1：后面的libADAS.a的错误怎么解决？我看到eyesee-mpp-middleware里面的Readme文件里面提到了预编译库，麻烦问一下这个预编译库是怎么编译出来的？
2：我编译的mpp sample不能生成，麻烦看一下这是怎么回事啊。
谢谢大佬！！

@wxid_disxysjskla 你好，用了你这个包，编译不成功。其中有些静态库是在你自己的电脑上编译的，我编译的时候提示找不到路径。我把这些库删除掉之后，就无法生成sample了。

rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-system/.pkgdir/eyesee-mpp-system/usr/lib/eyesee-mpp/liblog.so
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-system/.pkgdir/eyesee-mpp-system/usr/lib/eyesee-mpp/libhwdisplay.so
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-system/.pkgdir/eyesee-mpp-system/usr/lib/eyesee-mpp/libion.so
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/libaw_mpp.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/stream/file/libcdx_file_stream.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/stream/base/libcdx_stream.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/parser/id3v2/libcdx_id3v2_parser.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/parser/wav/libcdx_wav_parser.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/parser/mov/libcdx_mov_parser.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/parser/base/libcdx_parser.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/parser/ts/libcdx_ts_parser.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/parser/aac/libcdx_aac_parser.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/parser/mpg/libcdx_mpg_parser.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-middleware/eyesee-mpp-middleware/media/LIBRARY/libcedarx/libcore/parser/mp3/libcdx_mp3_parser.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-framework/.pkgdir/eyesee-mpp-framework/usr/lib/eyesee-mpp/libcustomaw_media_utils.so
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-external/eyesee-mpp-external-1.0/jsoncpp-0.8.0/libjsoncpp0.8.a
rm -f ./out/v853/vision/openwrt/build_dir/target/eyesee-mpp-external/eyesee-mpp-external-1.0/lz4-1.7.5/liblz4.a
rm -f ./out/v853/vision/openwrt/staging_dir/target/usr/lib/eyesee-mpp/liblz4.a
rm -f ./out/v853/vision/openwrt/staging_dir/target/usr/lib/eyesee-mpp/libjsoncpp0.8.a
rm -f ./out/v853/vision/openwrt/staging_dir/target/usr/lib/eyesee-mpp/liblog.so
rm -f ./out/v853/vision/openwrt/staging_dir/target/usr/lib/eyesee-mpp/libhwdisplay.so
rm -f ./out/v853/vision/openwrt/staging_dir/target/usr/lib/eyesee-mpp/libcustomaw_media_utils.so
rm -f ./out/v853/vision/openwrt/staging_dir/target/usr/lib/eyesee-mpp/libion.so
rm -f ./out/v853/vision/openwrt/staging_dir/target/root-v853-vision/usr/lib/eyesee-mpp/liblog.so
rm -f ./out/v853/vision/openwrt/staging_dir/target/root-v853-vision/usr/lib/eyesee-mpp/libhwdisplay.so
rm -f ./out/v853/vision/openwrt/staging_dir/target/root-v853-vision/usr/lib/eyesee-mpp/libcustomaw_media_utils.so
rm -f ./out/v853/vision/openwrt/staging_dir/target/root-v853-vision/usr/lib/eyesee-mpp/libion.so
rm -f ./platform/allwinner/eyesee-mpp/framework/sun8iw21/utils/libcustomaw_media_utils.so
rm -f ./platform/allwinner/eyesee-mpp/system/private/onvif/libOnvif.a
rm -f ./platform/allwinner/eyesee-mpp/system/private/rtsp/libTinyServer.a
rm -f ./platform/allwinner/eyesee-mpp/system/public/display/libhwdisplay.so
rm -f ./platform/allwinner/eyesee-mpp/system/public/libion/libion.so
rm -f ./platform/allwinner/eyesee-mpp/system/public/liblog/liblog.so
rm -f ./platform/allwinner/eyesee-mpp/external/jsoncpp-0.8.0/libjsoncpp0.8.a
rm -f ./platform/allwinner/eyesee-mpp/external/lz4-1.7.5/liblz4.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/librender/libcedarxrender.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/utils/libmedia_utils.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/libaw_mpp.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/libaw_mpp.a.bak
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libstream/libcedarxstream.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarc/vdecoder/libvdecoder.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarc/base/libcdc_base.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarc/memory/libMemAdapter.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarc/vencoder/base/libvenc_base.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarc/vencoder/libvencoder.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libResample/libResample.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libfilerepair/libfilerepair.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libisp/out/library/musl/libisp_math.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libisp/libISP.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/stream/file/libcdx_file_stream.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/stream/base/libcdx_stream.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/common/libcdx_common.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/base/libcdx_base.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/parser/id3v2/libcdx_id3v2_parser.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/parser/wav/libcdx_wav_parser.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/parser/mov/libcdx_mov_parser.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/parser/base/libcdx_parser.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/parser/ts/libcdx_ts_parser.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/parser/aac/libcdx_aac_parser.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/parser/mpg/libcdx_mpg_parser.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/libcedarx/libcore/parser/mp3/libcdx_mp3_parser.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/AudioLib/midware/encoding/libcedarx_aencoder.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/media/LIBRARY/AudioLib/midware/decoding/libadecoder.a
rm -f ./platform/allwinner/eyesee-mpp/middleware/sun8iw21/sample/configfileparser/libsample_confparser.a

@caochenxin
sudo apt install libopencv-dev
然后执行
g++ --std=c++11 -Wfatal-errors -O3 xxx.cpp -o yyy $(pkg-config --cflags --libs opencv4)
其中xxx是上面的源码，yyy是输出的文件名。
在ubuntu20.04系统上使用g++9.4版本编译通过。