On Sat, Jan 22, 2022 at 05:05:00PM +0800, Xi Ruoyao wrote:
> On Sat, 2022-01-22 at 16:56 +0800, 程璐璐 wrote:
>
> > Under the MIPS architecture, *.opt files are also generated in
> > $(srcdir).
>
> Well, but then you should put the commands for generating those files
> into contrib/gcc_update instead of Makefile.in, just like MIPS.
The MIPS does it wrong too. If the generated file is checked into the
tree as in the mips case, such a make rule can be there, but it
should be wrapped with
ifeq($(ENABLE_MAINTAINER_RULES),true)
...
endif
or so.
The point is, when not --enable-maintainer-mode, the gcc tree can be stored
on read-only filesystem.
When adding new CPUs, one just uses --enable-maintainer-mode and regenates
the generated but committed files and commits them together with the
changes.
There are many other examples of such generated files, configure,
Makefile.in from Makefile.am, etc.
Jakub
