https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63310
Bug ID: 63310
Summary: Ada bootstrap error with -fcompare-debug
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
CC: charlet at gcc dot gnu.org, ebotcazou at gcc dot gnu.org
My:
../configure --enable-languages=all,ada,obj-c++,lto,go
--enable-checking=release; GCC_COMPARE_DEBUG=1 make -j48 bootstrap > LOG 2>&1
&& GCC_COMPARE_DEBUG=1 make -j48 -k check > LOGC 2>&1; ../contrib/test_summary
> LOGT 2>&1
bootstrap on x86_64 failed with:
xgcc: error: a-rttiev.adb: -fcompare-debug failure
It seems this is caused by gnat_write_global_declarations, which creates
dummy_global decl AND corresponding varpool node for it (the former is not a
problem I think, we only require that decls that are created for both -g and
-g0 sort by DECL_UIDs the same (i.e. -g can have bigger gaps in the uids than
-g0), but for cgraph nodes e.g. node->order is visible in the dumps), and for
-g0
used_types_insert doesn't emit anything into types_used_by_cur_var_decl vector,
while for -g if there are global vars it sometimes does.
I have no idea what is dummy_global good for, but if you need it, it probably
has to be created regardless of whether types_used_by_cur_var_decl vector is
empty or not.
