$(POSTSTAGE1_CXX_EXPORT) \
$(LTO_EXPORTS) \
GDC="$$r/$(HOST_SUBDIR)/prev-gcc/gdc$(exeext) -B$$r/$(HOST_SUBDIR)/prev-gcc/ \
- -B$(build_tooldir)/bin/ $(GDC_FLAGS_FOR_TARGET) \
+ -B$(build_tooldir)/bin/ $(GDCFLAGS_FOR_TARGET) \
+ -B$$r/prev-$(TARGET_SUBDIR)/libphobos/libdruntime/gcc \
-B$$r/prev-$(TARGET_SUBDIR)/libphobos/src \
+ -B$$r/prev-$(TARGET_SUBDIR)/libphobos/src/.libs \
-I$$r/prev-$(TARGET_SUBDIR)/libphobos/libdruntime -I$$s/libphobos/libdruntime \
-L$$r/prev-$(TARGET_SUBDIR)/libphobos/src/.libs \
- -L$$r/prev-$(TARGET_SUBDIR)/libphobos/libdruntime/.libs"; \
+ -B$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/src/.libs \
+ -L$$r/prev-$(TARGET_SUBDIR)/libstdc++-v3/src/.libs"; \
export GDC; \
GDC_FOR_BUILD="$$GDC"; export GDC_FOR_BUILD; \
GNATBIND="$$r/$(HOST_SUBDIR)/prev-gcc/gnatbind"; export GNATBIND; \
--disable-coverage --enable-languages="$(STAGE1_LANGUAGES)" \
--disable-build-format-warnings
+@if target-libphobos-bootstrap
+STAGE1_CONFIGURE_FLAGS += --with-libphobos-druntime-only
+STAGE2_CONFIGURE_FLAGS += --with-libphobos-druntime-only
+@endif target-libphobos-bootstrap
+
# When using the slow stage1 compiler disable IL verification and forcefully
# enable it when using the stage2 compiler instead. As we later compare
# stage2 and stage3 we are merely avoid doing redundant work, plus we apply