touch cmake_arm.sh
添加
cpp
rm -rf build
mkdir build
cd build
ARCH=aarch64.cmake
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=../$ARCH ..
make
touch cmake_arm.sh
添加
cpp
SET(CMAKE_SYSTEM_NAME Linux)
SET(CMAKE_C_COMPILER /home/yqw/MetaRTC/BC/stbgcc-6.3-1.1/bin/arm-linux-gcc)
SET(CMAKE_CXX_COMPILER /home/yqw/MetaRTC/BC/stbgcc-6.3-1.1/bin/arm-linux-g++)
将这两个文件放入libmetartc6
./cmake_arm.sh
srtp
cpp
./configure --prefix="/home/yqw/temp/ffmpeg-webrtc/FFmpeg-n4.3.3/metartc6/libsrtp-2-fit" --host="arm-linux" --enable-static --enable-shared CC=/home/yqw/MetaRTC/BC/stbgcc-6.3-1.1/bin/arm-linux-gcc
make -j20
RV32
cpp
export PATH=$PATH:/home/yqw/MetaRTC/RV/usr/bin
cpp
./configure --prefix="/home/yqw/temp/ffmpeg-webrtc/FFmpeg-n4.3.3/metartc6/libsrtp-2-fit" --host="arm-linux" --enable-static --enable-shared CC=arm-linux-gnueabihf-gcc
openssl
cpp
./config no-asm shared no-async --prefix=$(pwd)/build --cross-compile-prefix=/home/yqw/MetaRTC/BC/stbgcc-6.3-1.1/bin/arm-linux-
make -j20
sudo make install
RV32
cpp
export PATH=$PATH:/home/yqw/MetaRTC/RV/usr/bin
cpp
./config no-asm shared no-async --prefix=$(pwd)/build --cross-compile-prefix=arm-linux-gnueabihf-
然后把Makefile中的所有的-m64删去
在build中到.a
编译ffmpeg
cpp
./configure --cross-prefix=/home/yqw/MetaRTC/BC/stbgcc-6.3-1.1/bin/arm-linux- --enable-cross-compile --target-os=linux --cc=/home/yqw/MetaRTC/BC/stbgcc-6.3-1.1/bin/arm-linux-gcc --arch=arm --prefix=$(pwd)/build32 --disable-shared --enable-static --extra-libs='-L/home/yqw/temp/ffmpeg-webrtc/FFmpeg-n4.3.3/metartc6 -lmetartccore6 -lpthread -lsrtp2 -lssl -lcrypto -ldl'
RV32
cpp
./configure --cross-prefix=/home/yqw/MetaRTC/RV/bin/arm-linux-gnueabihf- --enable-cross-compile --target-os=linux --cc=arm-linux-gnueabihf-gcc --arch=arm --prefix=$(pwd)/build_RV32 --disable-shared --enable-static --extra-libs='-L/home/yqw/temp/ffmpeg-webrtc/FFmpeg-n4.3.3/metartc6 -lmetartccore6 -lpthread -lsrtp2 -lssl -lcrypto -ldl'
注意这里的dl和pthread是调用交叉编译工具链中的库;当写在同一个--extra-libs里时没有顺序之分,如果用两个--extra-libs,那么就有加载的顺序之分,比如crypto里要用到dl,那么dl就需要放在它的前面加载。
第二个注意点,无法把ffmepg编译成动态库,不然会报如下错误:
cpp
libmetartccore6.a(YangMetaConnection.c.o): relocation R_ARM_THM_MOVW_ABS_NC against `a local symbol' can not be used when making a shared object; recompile with -fPIC
/home/yqw/temp/ffmpeg-webrtc/FFmpeg-n4.3.3/metartc6/metartc6/include/yang_config.h
#define Yang_Enable_Dtls 1 //default:using dtls
#define Yang_Enable_Openssl 1
#define Yang_Enable_RTC_Video 0
metartc支持mips32位,支持arm64,不支持arm32位,在arm32下报下列错误,这个错误是对内存的越界操作,然后再free(),目前metartc6和7都不支持arm32。
webrtc init>>>>>>>>>>>>>>>>>>>http://192.168.100.77:1985/tc/v1/whip/?app=live\&stream=livestream
[webrtc @ 0x189c3c0] webrtc_open http://192.168.100.77:1985/tc/v1/whip/?app=live\&stream=livestream
srtp init success!
*** Error in `/usr/data/ffmpeg': free(): invalid next size (fast): 0x0189cd20 ***
Program received signal SIGABRT, Aborted.
0xb6e515f6 in ?? () from /lib/libc.so.6
(gdb) bt
#0 0xb6e515f6 in ?? () from /lib/libc.so.6
#1 0xb6e5f2ac in raise () from /lib/libc.so.6
#2 0xb6e5ff9a in abort () from /lib/libc.so.6
#3 0xb6e86bba in ?? () from /lib/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)