From: David Woodhouse > Sent: 30 October 2023 09:46 > > On Sun, 2023-10-29 at 21:13 +0000, David Laight wrote: > > From: David Woodhouse > > > Sent: 28 October 2023 20:35 > > > > > > Using -MD without -MP causes build failures when a header file is deleted > > > or moved. With -MP, the compiler will emit phony targets for the header > > > files it lists as dependencies, and the Makefiles won't refuse to attempt > > > to rebuild a C unit which no longer includes the deleted header. > > > > Won't a phony target stop a header being built if there is > > an actual rule to build it? > > It probably would have taken you about the same time to find the answer > for yourself, as it took to write that email. Why don't you try it? I was sure that just adding foo.h: would generate a 'no rules to build' error. Maybe that was BSD make or SYS-V make. But calling the 'phony' is probably wrong. PHONY has a very specific meaning to make - and these aren't PHONY. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
