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Enable large arrays: Build octave such that it can use arrays larger than 2Gb.: Difference between revisions
Enable large arrays: Build octave such that it can use arrays larger than 2Gb. (edit)
Revision as of 14:19, 14 October 2019
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===Versions prior to Octave 4.4=== | ===Versions prior to Octave 4.4=== | ||
On previous versions of Octave, the default is that the size of a single Octave array cannot | On previous versions of Octave, the default is that the size of a single Octave array cannot have more than approximately 2^31 elements, even on systems that use 64-bit pointers. This is because array indices were limited to 32-bit signed integers by default. Trying to create one will produce the following error: | ||
<pre> | <pre> | ||
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</pre> | </pre> | ||
You will obtain this error even if your system has enough RAM to create this array ( | You will obtain this error even if your system has enough RAM to create this array (3 GB in the above case). | ||
To use arrays with more than (approximately) <math>2^{31}</math> elements, Octave has to be configured with the option <code>--enable-64</code>. This option is experimental and you are (as always) encouraged to submit bug reports if you find a problem. | To use arrays with more than (approximately) <math>2^{31}</math> elements, Octave has to be configured with the option <code>--enable-64</code>. This option is experimental and you are (as always) encouraged to submit bug reports if you find a problem. | ||