[Bug d/123045] gcc/gdc needs libstdc++ from bootstrap sources to link anything

[kirill at korins dot ky via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123045

--- Comment #3 from Kirill A. Korinsky <kirill at korins dot ky> ---
This patch is enough to pass make bootstrap2 -j2

Index: Makefile.in
--- Makefile.in.orig
+++ Makefile.in
@@ -54438,7 +54437,7 @@ configure-stage1-target-libphobos:
 maybe-configure-stage2-target-libphobos:
 @if target-libphobos-bootstrap
 maybe-configure-stage2-target-libphobos: configure-stage2-target-libphobos
-configure-stage2-target-libphobos:
+configure-stage2-target-libphobos: all-stage2-target-libstdc++-v3
        @[ $(current_stage) = stage2 ] || $(MAKE) stage2-start
        @$(SHELL) $(srcdir)/mkinstalldirs $(TARGET_SUBDIR)/libphobos
        @r=`${PWD_COMMAND}`; export r; \