c - 如何找到我当前的编译器标准，例如是否是 C90 等

Question

我正在 Linux 机器上工作。是否有任何系统命令可以查找我正在使用的 C 编译器遵循的标准？

Answer 1

这取决于编译器，我假设您使用的是 GCC。 您可以使用以下命令检查编译器定义的宏:

gcc -dM -E - < /dev/null

检查manual about the flags ，特别是:

###__STDC_VERSION__####

This macro expands to the C Standard's version number, a long integer constant of the form yyyymmL where yyyy and mm are the year and month of the Standard version. This signifies which version of the C Standard the compiler conforms to. Like __STDC__, this is not necessarily accurate for the entire implementation, unless GNU CPP is being used with GCC.

The value 199409L signifies the 1989 C standard as amended in 1994, which is the current default; the value 199901L signifies the 1999 revision of the C standard. Support for the 1999 revision is not yet complete.

This macro is not defined if the -traditional-cpp option is used, nor when compiling C++ or Objective-C.

在 this site你可以找到很多这方面的信息。参见表格here .