When Should the \'-stdlib=libstdc \' Flag Be Used with GCC?

When to Use the '-stdlib=libstdc ' Flag with GCC

When compiling with gcc, the '-stdlib=libstdc ' flag is necessary to specify the use of the GNU Standard C Library (libstdc ) as the runtime library.

Does the Compiler Automatically Use libstdc ?

No. Depending on the operating system and the specific GCC version, the compiler may default to a different runtime library.

When to Use the '-stdlib=libstdc ' Flag

Here are some scenarios where using the '-stdlib=libstdc ' flag is necessary:

• On Linux: While most Linux distributions use libstdc by default, specifying the flag explicitly can ensure compatibility across different versions.
• On macOS before Mavericks: Before macOS Mavericks, the default runtime library was Apple's older version of libstdc . To use libc (which supports C 11), the '-stdlib=libc ' flag must be used.
• On macOS since Mavericks: Since macOS Mavericks, libc has become the default and the '-stdlib=libstdc ' flag should not be used.

Compilation Commands

To compile C 11 code with libstdc on different operating systems, use the following commands:

• Linux: g -std=c 11 -stdlib=libstdc input.cxx -o a.out
• macOS before Mavericks: g -std=c 11 -stdlib=libc input.cxx -o a.out
• macOS since Mavericks: clang -std=c 11 input.cxx -o a.out

The above is the detailed content of When Should the \'-stdlib=libstdc \' Flag Be Used with GCC?. For more information, please follow other related articles on the PHP Chinese website!