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<chapter id="regress">

<title id="regress-title">Regression Tests</title>

<para>

Each line in the mapping file is of the form

<synopsis>

testname/platformnamepattern=comparisonfilename

testname/platformpattern=comparisonfilename

</synopsis>

The test name is just the name of the particular regression test

module. The platform name pattern is a pattern in the style of

expr(1) (that is, a regular expression with an implicit ^ anchor

module. The platform pattern is a pattern in the style of

expr(1) (that is, a regular expression with an implicit

<literal>^</literal> anchor

at the start). It is matched against the platform name as printed

by <filename>config.guess</filename>with an appended

by <filename>config.guess</filename>followed by

<literal>:gcc</literal> or <literal>:cc</literal>, depending on

whether you use the GNU compiler or the system's native compiler

(on systems where there is a difference). The comparison file

Each line in the mapping file is of the form

testname/platformnamepattern=comparisonfilename

testname/platformpattern=comparisonfilename

The test name is just the name of the particular regression test

module. The platform name pattern is a pattern in the style of expr(1)

(that is, a regular expression with an implicit ^ anchor at the

start). It is matched against the platform name as printed by

config.guess. The comparison file name is the name of the substitute

result comparison file.

module. The platform pattern is a pattern in the style of expr(1)

(that is, a regular expression with an implicit ^ anchor at the start).

It is matched against the platform name as printed by config.guess

followed by ":gcc" or ":cc", depending on whether you use the GNU compiler

or the system's native compiler (on systems where there is a difference).

The comparison file name is the name of the substitute result comparison

file.

For example: the int2 regress test includes a deliberate entry of a

value that is too large to fit in int2. The specific error message