Difference between revisions of "Creating pattern rules"
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[[Main Page|Home]] > [[CentOS]] > [[CentOS 6.x]] > [[Programming tools]] > [[Makefile]] > [[Creating pattern rules]] | |||
Make supports implicit pattern rules for creating .o files from .c files. It is possible to extend the rule-set and create more rules to create user-defined rules. To create own rules the target must contain exactly one % character which will match with any string or length one or more. Example pattern rule is: | Make supports implicit pattern rules for creating .o files from .c files. It is possible to extend the rule-set and create more rules to create user-defined rules. To create own rules the target must contain exactly one % character which will match with any string or length one or more. Example pattern rule is: | ||
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Note the use of special variables $< and $@ which refer to source and target respectively in creation of pattern. Also note that pattern rule has two patterns separated by ':' then a recipe at the end separated from second pattern by ';'. This pattern rule will allow creation of .svg files from .dot files | Note the use of special variables $< and $@ which refer to source and target respectively in creation of pattern. Also note that pattern rule has two patterns separated by ':' then a recipe at the end separated from second pattern by ';'. This pattern rule will allow creation of .svg files from .dot files | ||
[[Main Page|Home]] > [[CentOS]] > [[CentOS 6.x]] > [[Programming tools]] > [[Makefile]] > [[Creating pattern rules]] | |||
Latest revision as of 15:55, 24 August 2022
Home > CentOS > CentOS 6.x > Programming tools > Makefile > Creating pattern rules
Make supports implicit pattern rules for creating .o files from .c files. It is possible to extend the rule-set and create more rules to create user-defined rules. To create own rules the target must contain exactly one % character which will match with any string or length one or more. Example pattern rule is:
%.svg : %.dot ; dot -Tsvg $< > $@
Note the use of special variables $< and $@ which refer to source and target respectively in creation of pattern. Also note that pattern rule has two patterns separated by ':' then a recipe at the end separated from second pattern by ';'. This pattern rule will allow creation of .svg files from .dot files
Home > CentOS > CentOS 6.x > Programming tools > Makefile > Creating pattern rules
