GNU Make: Difference between revisions
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==.DELETE_ON_ERROR== | ==Important [http://www.gnu.org/software/autoconf/manual/make/Special-Targets.html#Special-Targets Special Targets]== | ||
===.DELETE_ON_ERROR=== | |||
* Generally, if make fails to build a target, and the target corresponds to a file, you want that file removed. | * Generally, if make fails to build a target, and the target corresponds to a file, you want that file removed. | ||
** Why might this happen? Ctrl-c being pressed during a build. Multiple statements in a build recipe. Memory allocation failure during build. Any number of things. | ** Why might this happen? Ctrl-c being pressed during a build. Multiple statements in a build recipe. Memory allocation failure during build. Any number of things. | ||
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** <tt>kill -9</tt>'ing <tt>make</tt> will prevent this from happening! :/ | ** <tt>kill -9</tt>'ing <tt>make</tt> will prevent this from happening! :/ | ||
* [[gcc]] and some other tools will clean up on error, for some cases. Use <tt>.DELETE_ON_ERROR</tt> to be safe. | * [[gcc]] and some other tools will clean up on error, for some cases. Use <tt>.DELETE_ON_ERROR</tt> to be safe. | ||
===.PHONY:=== | |||
* GNU Make manual section 4.6, "[http://www.gnu.org/software/autoconf/manual/make/Phony-Targets.html#Phony-Targets Phony Targets]" | |||
* <tt>clean</tt>, <tt>all</tt>, <tt>test</tt> targets ought almost always be <tt>.PHONY</tt> | |||
===.DEFAULT:=== | |||
* GNU Make manual section 10.6, "[http://www.gnu.org/software/autoconf/manual/make/Last-Resort.html Defining Last Resort Rules]" | |||
==Make and [[subversion]]== | ==Make and [[subversion]]== | ||