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Can a variable number of arguments be passed to a function?
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What does -D_XOPEN_SOURCE do/mean?
...erent versions of the standard.
500 - X/Open 5, incorporating POSIX 1995
600 - X/Open 6, incorporating POSIX 2004
700 - X/Open 7, incorporating POSIX 2008
You can tell which one you need (if any) by looking at the man page for each function you call.
For example, man strdup says:
Feature Te...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
..._US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules.cache
head /usr/lib/locale/locale-archive
head /usr/share/locale/locale.alias
head /usr/lib/locale/en_US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules....
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
..._US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules.cache
head /usr/lib/locale/locale-archive
head /usr/share/locale/locale.alias
head /usr/lib/locale/en_US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules....
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
..._US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules.cache
head /usr/lib/locale/locale-archive
head /usr/share/locale/locale.alias
head /usr/lib/locale/en_US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules....
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
..._US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules.cache
head /usr/lib/locale/locale-archive
head /usr/share/locale/locale.alias
head /usr/lib/locale/en_US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules....
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
..._US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules.cache
head /usr/lib/locale/locale-archive
head /usr/share/locale/locale.alias
head /usr/lib/locale/en_US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules....
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
..._US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules.cache
head /usr/lib/locale/locale-archive
head /usr/share/locale/locale.alias
head /usr/lib/locale/en_US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules....
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
..._US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules.cache
head /usr/lib/locale/locale-archive
head /usr/share/locale/locale.alias
head /usr/lib/locale/en_US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules....
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
..._US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules.cache
head /usr/lib/locale/locale-archive
head /usr/share/locale/locale.alias
head /usr/lib/locale/en_US.UTF-8/LC_CTYPE
head /usr/lib/locale/en_US.utf8/LC_CTYPE
head /usr/lib64/gconv/gconv-modules....