Paul Smith wrote: > I do not > usually recommend this method of clearing the default rules. There are > issues with modifying MAKEFLAGS, especially with some older versions of > GNU Make. And also, in some older versions setting MAKEFLAGS in the > makefile doesn't actually take effect anyway: it only helps for sub- > makes.
Thanks for the clarification. > My recommendation has been to disable the built-in rules directly, if > you don't need them. For example you can use: > > .SUFFIXES: > > to disable most of the built in rules (this is a POSIX standard > facility so it's helpful even for other versions of make). That's nice, because as a developer I don't want to have to test my Makefiles with GNU make and with non-GNU make separately. > Unfortunately that doesn't fix all problems because GNU Make also has a > few built-in rules that are defined using pattern rules (because suffix > rules are not powerful enough). So a full list of "turn it all off" > would be this: > > .SUFFIXES: > %:: %,v > %:: RCS/%,v > %:: RCS/% > %:: s.% > %:: SCCS/s.% > > Hopefully these are just considered funnily-named targets and won't > hurt anything, when used in non-GNU Make versions of make. > > I admit this is annoying since it's possible that the catalog of built- > in rules could change in the future. It's also annyoing because it does not work portably: On FreeBSD and NetBSD, 'make' gives an error: make: don't know how to make %,v. Stop Similarly on OpenBSD: make: don't know how to make %,v (prerequisite of: %) Can we get a syntax to clear all built-in rules that works portably? For example, such as: .SUFFIXES: .GNUSUFFIXES: Bruno
