diag, Qdiag

Controls the display of diagnostic information during compilation.

Syntax

Linux and macOS:

-diag-type=diag-list

Windows:

/Qdiag-type:diag-list

Arguments

type

Is an action to perform on diagnostics. Possible values are:

enable	Enables a diagnostic message or a group of messages. If you specify -diag-enable=all (Linux* and OS X) or /Qdiag-enable:all (Windows), all diagnostic messages shown in `diag-list` are enabled.
disable	Disables a diagnostic message or a group of messages. If you specify -diag-disable=all (Linux* and OS X) or /Qdiag-disable:all (Windows), all diagnostic messages shown in `diag-list` are disabled.
error	Tells the compiler to change diagnostics to errors.
warning	Tells the compiler to change diagnostics to warnings.
remark	Tells the compiler to change diagnostics to remarks (comments).

diag-list

Is a diagnostic group or ID value. Possible values are:

driver	Specifies diagnostic messages issued by the compiler driver.
vec	Specifies diagnostic messages issued by the vectorizer.
par	Specifies diagnostic messages issued by the auto-parallelizer (parallel optimizer).
openmp	Specifies diagnostic messages issued by the OpenMP* parallelizer.
warn	Specifies diagnostic messages that have a "warning" severity level.
error	Specifies diagnostic messages that have an "error" severity level.
remark	Specifies diagnostic messages that are remarks or comments.
cpu-dispatch	Specifies the CPU dispatch remarks for diagnostic messages. These remarks are enabled by default.
id[,id,...]	Specifies the ID number of one or more messages. If you specify more than one message number, they must be separated by commas. There can be no intervening white space between each id.
tag[,tag,...]	Specifies the mnemonic name of one or more messages. If you specify more than one mnemonic name, they must be separated by commas. There can be no intervening white space between each tag.

The diagnostic messages generated can be affected by certain options, such as [Q]x, /arch (Windows) or -m (Linux and OS X).

Default

OFF	The compiler issues certain diagnostic messages by default.

Description

This option controls the display of diagnostic information during compilation. Diagnostic messages are output to stderr unless the [Q]diag-file option is specified.

Note

The [Q]diag options do not control diagnostics emitted at run-time. For more information about run-time errors and diagnostics, see Handling Run-Time Errors.

To control the diagnostic information reported by the vectorizer, use options [q or Q]opt-report and [q or Q]opt-report-phase, phase vec.

To control the diagnostic information reported by the auto-parallelizer, use options [q or Q]opt-report and [q or Q]opt-report-phase, phase par.

IDE Equivalent

Visual Studio: Diagnostics > Disable Specific Diagnostics

Eclipse: None

Xcode: Diagnostics > Disable Specific Diagnostics

Alternate Options

enable vec	Linux and OS X: -qopt-report; -qopt-report -qopt-report-phase=vec Windows: /Qopt-report; /Qopt-report /Qopt-report-phase:vec
disable vec	Linux and OS X: -qopt-report=0 -qopt-report-phase=vec Windows: /Qopt-report:0 /Qopt-report-phase:vec
enable par	Linux and OS X: -qopt-report; -qopt-report -qopt-report-phase=par Windows: /Qopt-report; /Qopt-report /Qopt-report-phase:par
disable par	Linux and OS X: -qopt-report=0 -qopt-report-phase=par Windows: /Qopt-report:0 /Qopt-report-phase:par

Example

The following example shows how to enable diagnostic IDs 117, 230 and 450:

-diag-enable=117,230,450     ! Linux and OS X systems
/Qdiag-enable:117,230,450    ! Windows systems

The following example shows how to change vectorizer diagnostic messages to warnings:

-diag-enable=vec -diag-warning=vec      ! Linux and OS X systems
/Qdiag-enable:vec /Qdiag-warning:vec    ! Windows systems

Note that you need to enable the vectorizer diagnostics before you can change them to warnings.

The following example shows how to disable all auto-parallelizer diagnostic messages:

-diag-disable=par     ! Linux and OS X systems
/Qdiag-disable:par    ! Windows systems

The following example shows how to change all diagnostic warnings and remarks to errors:

-diag-error=warn,remark    ! Linux and OS X systems
/Qdiag-error:warn,remark   ! Windows systems

The following example shows how to get a list of only vectorization diagnostics:

-diag-dump -diag-disable=all -diag-enable=vec        ! Linux and OS X systems
/Qdiag-dump /Qdiag-disable:all /Qdiag-enable:vec     ! Windows systems