[Bug target/71767] Endless stream of warnings when using GCC with -Wa,-q and Clang Integrated Assembler

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71767

--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Test failures with the patch in comment 4

FAIL: g++.old-deja/g++.pt/static11.C  -std=c++11 (test for excess errors)
FAIL: g++.old-deja/g++.pt/static11.C  -std=c++14 (test for excess errors)
FAIL: g++.old-deja/g++.pt/static11.C  -std=c++98 (test for excess errors)

-m32 only

FAIL: obj-c++.dg/qual-types-1.mm -fgnu-runtime (test for excess errors)

for both -m32 and -m64

FAIL: libgomp.c++/taskloop-6.C (test for excess errors)

-m32 only

                === libstdc++ tests ===


Running target unix/-m32
FAIL: 20_util/scoped_allocator/1.cc (test for excess errors)
FAIL: 20_util/scoped_allocator/2.cc (test for excess errors)
FAIL: 21_strings/basic_string/allocator/char/copy.cc (test for excess errors)
...
FAIL: tr1/6_containers/unordered_set/swap/1.cc (test for excess errors)
FAIL: tr1/6_containers/unordered_set/swap/2.cc (test for excess errors)

                === libstdc++ Summary for unix/-m32 ===

# of expected passes            9965
# of unexpected failures        426
# of expected failures          65
# of unsupported tests          663

Running target unix/-m64

                === libstdc++ Summary for unix/-m64 ===

# of expected passes            10389
# of expected failures          65
# of unsupported tests          664

                === libstdc++ Summary ===

# of expected passes            20354
# of unexpected failures        426
# of expected failures          130
# of unsupported tests          1327

The failures are of the kind

[Book15] f90/bug% /opt/gcc/gcc7w/bin/g++
/opt/gcc/_clean/gcc/testsuite/g++.old-deja/g++.pt/static11.C -std=c++98 -m32
ld: warning: direct access in function
'__static_initialization_and_destruction_0(int, int)' from file
'/var/folders/8q/sh_swgz96r7f5vnn08f7fxr00000gn/T//ccPdDjOW.o' to global weak
symbol 'guard variable for C<int>::a' from file
'/var/folders/8q/sh_swgz96r7f5vnn08f7fxr00000gn/T//ccPdDjOW.o' means the weak
symbol cannot be overridden at runtime. This was likely caused by different
translation units being compiled with different visibility settings.