[Bug d/122924] New: make install after make bootstrap2 missed dlang's std when make boostrap works as expected

[kirill at korins dot ky via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122924

            Bug ID: 122924
           Summary: make install after make bootstrap2 missed dlang's std
                    when make boostrap works as expected
           Product: gcc
           Version: 15.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: kirill at korins dot ky
  Target Milestone: ---

When I build gcc-15.2.0 as make bootstrap2 it misses dlang's std when I make
make install after make bootstrap2, but when I used make boostrap it works as
expected

I see in Makefile.in that code

@if target-libphobos-bootstrap
STAGE1_CONFIGURE_FLAGS += --with-libphobos-druntime-only
STAGE2_CONFIGURE_FLAGS += --with-libphobos-druntime-only
@endif target-libphobos-bootstrap

and if I nuke

STAGE2_CONFIGURE_FLAGS += --with-libphobos-druntime-only

it works as expected.