老文存檔，有時間補全
http://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html
http://cgit.openembedded.org/meta-openembedded/tree/meta-webserver/recipes-httpd/nginx/files/nginx-cross.patch
https://stackoverflow.com/questions/4357570/use-file-offset64-vs-file-offset-bits-64
https://digital-domain.net/largefiles.html
https://stackoverflow.com/questions/35575749/how-to-define-file-offset-bits-large-files-macro-for-solaris-and-hp-aix
http://users.suse.com/~aj/linux_lfs.html
