so, suppose I have a file file.c, and a file anothr.c. I would like to set the compilation command for each of those files separately, say: gcc -Wall -O3 -o f file.c, and gcc -Wall -std=c99 -o a another.c. How can I set the gcc command for that buffer so that every time I open it, it knows how to compile it? Is there something with the // -*- directive or something like that? Thanks.
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Dervin Thunk
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2 Answers
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Yes, you can use the directive in the file, and also set other value. Try this in line one or two:
// -*- compile-command: "gcc -Wall -O3 -o f file.c" -*-
and then re-load the file with C-x v so that the setting takes effect.
I sometimes set things like c-indent-level: 4; c-basic-offset: 4; in there too.
Dirk Eddelbuettel
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`C-x v` apparently means `revert-buffer`. Not a default binding for me. – Felipe Cortez Nov 29 '20 at 13:00
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1It might be mode dependent. I think I (decades ago) set programming mode to derive from text mode. – Dirk Eddelbuettel Nov 29 '20 at 14:56
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What you're looking for are called file local variables, or sometimes just "local variables", per the in-comment declarative format described here.
In addition to the syntax given in Dirk's answer, you can write a "local variables" block at the end of your file:
/* Local Variables: */
/* compile-command:"gcc -Wall -O3 -o f file.c" */
/* End: */
You can use the interactive function add-file-local-variable to help maintain this list if you don't want to type each entry manually.
