Please cross-reference against issue 37210 if/when merging, if it hasn't already been: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37210
On Fri, Dec 1, 2023 at 2:15 AM Richard Biener <richard.guent...@gmail.com> wrote: > > On Thu, Nov 30, 2023 at 2:42 PM Xi Ruoyao <xry...@xry111.site> wrote: > > > > Recently there are some people building GCC with srcdir == objdir and > > the attempts just failed [1]. So stop to say "it should work". OTOH > > objdir as a subdirectory of srcdir works: we've built GCC in LFS [2] > > and BLFS [3] this way for decades and this is confirmed during the > > review of a previous version of this patch [4]. > > > > [1]: https://gcc.gnu.org/pipermail/gcc-help/2023-November/143068.html > > [2]: https://www.linuxfromscratch.org/lfs/view/12.0/chapter08/gcc.html > > [3]: https://www.linuxfromscratch.org/blfs/view/12.0/general/gcc.html > > [4]: https://gcc.gnu.org/pipermail/gcc-patches/2023-November/638760.html> > > > gcc/ChangeLog: > > > > * doc/install.texi: Deem srcdir == objdir broken, but objdir > > as a subdirectory of srcdir fine. > > --- > > > > Superseds > > https://gcc.gnu.org/pipermail/gcc-patches/2023-November/638728.html. > > > > Ok for trunk? > > OK. > > Thanks, > Richard. > > > gcc/doc/install.texi | 5 ++--- > > 1 file changed, 2 insertions(+), 3 deletions(-) > > > > diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi > > index c1ccb8ba02d..c1128d9274c 100644 > > --- a/gcc/doc/install.texi > > +++ b/gcc/doc/install.texi > > @@ -697,9 +697,8 @@ phases. > > First, we @strong{highly} recommend that GCC be built into a > > separate directory from the sources which does @strong{not} reside > > within the source tree. This is how we generally build GCC; building > > -where @var{srcdir} == @var{objdir} should still work, but doesn't > > -get extensive testing; building where @var{objdir} is a subdirectory > > -of @var{srcdir} is unsupported. > > +where @var{objdir} is a subdirectory of @var{srcdir} should work as well; > > +building where @var{objdir} == @var{srcdir} is unsupported. > > > > If you have previously built GCC in the same directory for a > > different target machine, do @samp{make distclean} to delete all files > > -- > > 2.43.0 > >
