[#BloombergLP-bsls-Log-stderrMessageHandler]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bsls.adoc[bsls]::xref:BloombergLP/bsls/Log.adoc[Log]::stderrMessageHandler
:relfileprefix: ../../../
:mrdocs:

Write, to the `stderr` output stream, a string composed of the specified `severity`, `file` name, `line` number, and the `message`. The behavior is undefined unless `0 <= line`. Note that this function provides an implementation of the `LogMessageHandler` function prototype, and will write the message irrespective of the current `severityThreshold`.

== Synopsis

Declared in `<bsls_log.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
void
stderrMessageHandler(
    xref:BloombergLP/bsls/LogSeverity/Enum.adoc[bsls::LogSeverity::Enum] severity,
    char const* file,
    int line,
    char const* message);
----


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