save-source-level-debug-info-switch

As with all compiler switch variables, the value of this variable can be t, nil, or a function object that accepts five arguments and returns t or nil. The arguments passed to the function will be the values of the safety, space, speed, debug, and compilation-speed optimization qualities, in that order. nil is equivalent to a function that always returns nil and t to a function that always returns t. When the value is a function and we say t (or true) or nil (or false) in the text below, we mean that the function returns, respectively, t or nil.

Bound to a function which, given safety, space, speed, debug, and compilation-speed, returns t if the compiler should save information in fasl files useful for source-level debugging (see The source stepper in debugging.htm) and for coverage analysis (see with-coverage).

Initially true if debug is greater than 2.

Note: when this switch is true, the compiler uses more stack. If you have problem compiling because of stack overflows, evaluate (setq comp:save-source-level-debug-info-switch nil) to suppress collection of the data.

See compiling.htm for information on the compiler.

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This page is new in the 8.2 release.
Created 2016.6.21.