Intel® oneAPI DPC++/C++ Compiler Developer Guide and Reference

Development Reference Guides

Contents

Invoke the Compiler

Requirements Before Using the Command Line

You may need to set certain environment variables before using the command line. For more information, see .

Different Compilers and Drivers

The table below provides the different compiler front-end and driver information.
Compiler
Notes
Linux Driver
Windows Driver
Intel® DPC++ Compiler
A C++ and SYCL compiler with a Clang front-end.
To use Microsoft Visual C++ (MSVC) compatible options, use
dpcpp-cl
.
dpcpp
dpcpp
 (
clang
 compatible)
dpcpp-cl
 (
clang-cl
 compatible)
Intel® C++ Compiler
A C++ compiler with a Clang front-end, that supports an OpenMP offload.
icx
 for C
icpx
 for C++
icx

Use the Compiler from the Command Line

Use the compiler with the OS/language specific invocations below.
Linux
Invoke the compiler using
icx
/
icpx
 or
dpcpp
 to compile C/C++
/DPC++
 source files.
  • When you invoke the compiler with
    dpcpp
     the compiler builds C++ source files with SYCL using SYCL libraries and SYCL include files. If you use
    dpcpp
     with a C source file, it is compiled as a SYCL file. Use
    dpcpp
     to link SYCL object files.
  • When you invoke the compiler with
    icx
     the compiler builds C source files using LLVM C libraries and C include files. If you use
    icx
    with a C++ source file, it is compiled as a C++ file. Use
    icx
     to link C object files.
  • When you invoke the compiler with
    icpx
     the compiler builds C++ source files using C++ libraries and C++ include files. If you use
    icpx
     with a C source file, it is compiled as an C++ file. Use
    icpx
     to link C++ object files.
The
icx
,
icpx
, or
dpcpp
 command:
  • Compiles and links the input source file(s).
  • Produces one executable file,
    a.out
    , in the current directory.
Windows
You can invoke the compiler on the command line using
icx
 or
dpcpp-cl
. This command:
  • Compiles and links the input source file(s).
  • Produces object file(s) and assigns the names of the respective source file(s), but with a
    .obj
     extension.
  • Produces one executable file and assigns it the name of the first input file on the command line, but with a
    .exe
     extension.
  • Places all the files in the current directory.
When compilation occurs with the compiler, many tools may be called to complete the task that may reproduce diagnostics unique to the given tool. For instance, the linker may return a message if it cannot resolve a global reference.

Command Line Syntax

The syntax to invoke the compiler is:
Linux
icpx [option] file1 [file2...]
Windows
icx [option] file1 [file2...]
Argument
Description
option
Indicates one or more command line options.
On Linux systems, the compiler recognizes one or more letters preceded by a hyphen (
-
).
On Windows, options are preceded by a hyphen (
-
) or slash (
/
). This includes linker options.
Options are not required when invoking the compiler. The default behavior of the compiler implies that some options are ON by default when invoking compiler.
file1, file2...
Indicates one or more files to be processed by the compiler.
/link
 (Windows)
All options following
/link
 are passed to the linker. Compiler options must precede
link
if they are not to be passed to the linker.

Other Methods for Using the Command Line to Invoke the Compiler

  • Using makefiles from the Command Line:
     Use makefiles to specify a number of files with various paths and to save this information for multiple compilations. For more information on using makefiles, see .
  • Using a Batch File from the Command Line:
     Create and use a
    .bat
     file to execute the compiler with a desired set of options instead of retyping the command each time you need to recompile.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.