Setting Compile-Time Environment Variables

The following table shows the compile-time environment variables that affect the Intel® Fortran Compiler:

Environment Variable Description

IFORTCFG

Specifies a configuration file that the compiler should use instead of the default configuration file.

By default, the compiler uses the default configuration file (ifort.cfg) from the same directory where the compiler executable resides.

Note: On Windows* systems, this environment variable cannot be set from the IDE.

INTEL_LICENSE_FILE

Specifies the location of the product license file.

PATH

Specifies the directory path for the compiler executable files.

TMP, TMPDIR, TEMP

Specifies the directory in which to store temporary files. See Temporary Files Created by the Compiler or Linker.

Note: For Windows, this environment variable cannot be set from the IDE.

FPATH

The path for include and module files.

GCCROOT
(Linux* and Mac OS*)

Specifies the location of the gcc binaries. Set this variable only when the compiler cannot locate the gcc binaries when using the -gcc-name option.

GXX_INCLUDE
(Linux and Mac OS)

The location of the gcc headers. Set this variable to specify the locations of the GCC installed files when the compiler does not find the needed values as specified by the use of -gcc-name=directory-name/gcc.

GXX_ROOT
(Linux and Mac OS)

The location of the gcc binaries. Set this variable to specify the locations of the GCC installed files when the compiler does not find the needed values as specified by the use of -gcc-name=directory-name/gcc.

LD_LIBRARY_PATH (Linux)

 

The path for shared (.so) library files.

DYLD_LIBRARY_PATH (Mac OS)

The path for dynamic libraries.

INCLUDE (Windows)

Specifies the directory path for the include files (files included by an INCLUDE statement, #include files, RC INCLUDE files, and module files referenced by a USE statement).

LIB (Windows)

Specifies the directory path for .LIB (library) files, which the linker links in. If the LIB environment variable is not set, the linker looks for .LIB files in the current directory.

Additionally, there are a number of run-time environment variables that you can set. For a list of environment variables recognized at run time and information on setting and viewing environment variables, see Run-Time Environment Variables.

You can use the SET command at the command prompt to set environment variables. Depending on your operating system, there are additional ways to set environment variables.

Setting Environment Variables (Linux and Mac OS)

You can set environment variables by using the ifortvars.csh and ifortvars.sh files to set several at a time. The files are found in the product's bin directory. See Using the ifortvars File to Specify Location of Components.

Within the C Shell, use the setenv command to set an environment variable:

setenv FORT9 /usr/users/smith/test.dat

To remove the association of an environment variable and its value within the C shell, use the unsetenv command.

unsetenv FORT9

Within the Bourne* shell (sh), the Korn shell (ksh), and the bash shell, use the export command and assignment command to set the environment variable:

export FORT9

FORT9=/usr/users/smith/test.dat

To remove the association of an environment variable and its value within the Bourne* shell, the Korn shell, or the bash shell, use the unset command:

unset FORT9

 

Setting Environment Variables (Windows)

Certain environment variables specifying path, library, and include directories can be defined in the IDE on a per user basis using Tools>Options... from the menu bar. For more information, see Specifying Path, Library, and Include Directories.

Additionally, you can set the environment variables needed by Intel Fortran  using the ifortvars.bat file. See Using the ifortvars File to Specify Location of Components.

Note

If you specify devenv/useenv on the command line to start the IDE, the IDE uses the PATH, INCLUDE, and LIB environment variables defined for that command line when performing a build. It uses these values instead of the values defined using Tool>Options.  

For more information on the devenv command, see the devenv description in the Microsoft Visual Studio* documentation.

During installation, the Intel Fortran compiler may modify certain system-wide environment variables, depending on your installation choices. (For more information, see the install.htm file.)

To view or change these environment variable settings, do the following:

On Windows* 2000, Windows NT* 4, or Windows XP* systems:

  1. Log into an account with Administrator privilege.

  2. Open the Control panel (Start>Settings>Control panel).

  3. Click System.

  4. On Windows 2000 and Windows XP systems: Click the Advanced tab and then click the Environment Variables button. On Windows NT 4 systems: Click the Environment tab.

  5. View or change the displayed environment variables.

  6. To have any environment variable changes take effect immediately, click Apply.

  7. Click OK.

Note

Changing system-wide environment variables affects command line builds (those done without IDE involvement), but not builds done through the IDE. IDE builds are managed by the environment variables set in the IDE Using Tools>Options. An exception to this is an IDE build (devenv) done from the command line that specifies the /useenv option. In this case, the IDE uses the PATH, INCLUDE, and LIB environment variables defined for that command line.

You can set an environment variable from within a program by calling the SETENVQQ routine. For example:

USE IFPORT

 LOGICAL(4) success

 success = SETENVQQ("PATH=c:\mydir\tmp")

 success = &

 SETENVQQ("LIB=c:\mylib\bessel.lib;c:\math\difq.lib")