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-x

Specifies the language of source files.

-x language

Where:

language

Specifies the language of subsequent source files, one of the following:

c: C code.
c++: C++ code.
assembler-with-cpp: Assembly code containing C directives that require the C preprocessor.
assembler: Assembly code that does not require the C preprocessor.

Usage

-x overrides the default language standard for the subsequent input files that follow it on the command-line. For example:

armclang inputfile1.s -xc inputfile2.s inputfile3.s

In this example, armclang treats the input files as follows:

inputfile1.s appears before the -xc option, so armclang treats it as assembly code because of the .s suffix.
inputfile2.s and inputfile3.s appear after the -xc option, so armclang treats them as C code.

Use -std to set the default language standard.

By default the compiler determines the source file language from the filename suffix, as follows:

.cpp, .cxx, .c++, .cc, and .CC indicate C++, equivalent to -x c++.
.c indicates C, equivalent to -x c.
.s (lower-case) indicates assembly code that does not require preprocessing, equivalent to -x assembler.
.S (upper-case) indicates assembly code that requires preprocessing, equivalent to -x assembler-with-cpp.

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