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#### 15.1.1 List of Filename Extensions and Languages

If a source file name ends in one of the following extensions, then GDB infers that its language is the one indicated.

`.ada`
`.ads`
`.adb`
`.a`

  Ada source file.

`.c`

  C source file

`.C`
`.cc`
`.cp`
`.cpp`
`.cxx`
`.c++`

  C`++` source file

`.d`

  D source file

`.m`

  Objective-C source file

`.f`
`.F`

  Fortran source file

`.mod`

  Modula-2 source file

`.s`
`.S`

  Assembler source file. This actually behaves almost like C, but GDB does not skip over function prologues when stepping.

In addition, you may set the language associated with a filename extension. See Displaying the Language.