背景

英伟达平台搞osd时间戳，参考原海思，稍微麻烦了一点！
osd背景参考《海思OSD开发系列(一) SDL_TTF框架移植》

超快编译

我已经将所有资源整理上传到github/gitee

使用编译完成的库直接测试

所有编译好的库和文件都放在lib下面。

//git clone https://github.com/hayson/jetson_sdl_ttf.git
git clone https://gitee.com/hayson/jetson_sdl_ttf.git
cd jetson_sdl_ttf/sample
make;./run_test.sh

打开save.bmp即生成的osd位图。

重新编译

cd jetson_sdl_ttf/
./build.sh

编译过程记录

如果只是使用的话这里不用看了，记录遇到了问题，给别的平台移植参考。

SDL-1.2.15配置失败

主要原因是SDL-1.2.15版本比较老，config.guess里面没有支持当前arm版本这种build类型

• 出错记录1

checking build system type... ./build-scripts/config.guess: unable to guess system typeThis script, last modified 2009-09-18, has failed to recognize
the operating system you are using. It is advised that you
download the most up to date version of the config scripts fromhttp://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
andhttp://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEADIf the version you run (./build-scripts/config.guess) is already up to date, please
send the following data and any information you think might be
pertinent to  in order to provide the needed
information to handle your system.config.guess timestamp = 2009-09-18uname -m = aarch64
uname -r = 5.10.104-tegra
uname -s = Linux
uname -v = #8 SMP PREEMPT Wed Nov 9 05:59:23 UTC 2022/usr/bin/uname -p = aarch64
/bin/uname -X     = hostinfo               = 
/bin/universe          = 
/usr/bin/arch -k       = 
/bin/arch              = aarch64
/usr/bin/oslevel       = 
/usr/convex/getsysinfo = UNAME_MACHINE = aarch64
UNAME_RELEASE = 5.10.104-tegra
UNAME_SYSTEM  = Linux
UNAME_VERSION = #8 SMP PREEMPT Wed Nov 9 05:59:23 UTC 2022
configure: error: cannot guess build type; you must specify one

• 解决办法1
  下载最新github上sdl2的版本（SDL2-2.26.4.tar.gz），从里面拷贝最新的config.guess和config.sub替换即可。
  ps：出错提示下载的config.guess不行。
• 错误记录2

./src/video/x11/SDL_x11sym.h:168:17: error: conflicting types for ‘_XData32’168 | SDL_X11_SYM(int,_XData32,(Display *dpy,register long *data,unsigned len),(dpy,data,len),return)

一个type冲突，修改SDL_x11sym.h文件
替换168行
SDL_X11_SYM(int,_XData32,(Display *dpy,register _Xconst long *data,unsigned len),(dpy,data,len),return)

参考

freetype-SDL-SDL_TTL
《Jetson Xavier Nx安装SDL1.2.15》