On Fri, Apr 17, 2015 at 4:59 AM, Jakub Jelinek <ja...@redhat.com> wrote: > On Fri, Apr 17, 2015 at 04:48:48AM -0700, H.J. Lu wrote: >> > I don't like it. Nonshared libgcc is libgcc.a, period. No sense in >> > creating yet another library for that. >> > So, IMHO beyond making the __cpu* entrypoints compat symbols only (@ >> > instead >> > of @@ symbol versions) the right fix is simply tweak init_gcc_spec, so that >> > static_name is always linked in, in the switch combinations that it isn't >> > right now of course after shared_name rather than before that. >> > I thought we've fixed that years ago... >> > >> >> We never pass -lgcc to linker when building C++ DSO: >> >> /usr/libexec/gcc/x86_64-redhat-linux/4.9.2/collect2 -plugin >> /usr/libexec/gcc/x86_64-redhat-linux/4.9.2/liblto_plugin.so >> -plugin-opt=/usr/libexec/gcc/x86_64-redhat-linux/4.9.2/lto-wrapper >> -plugin-opt=-fresolution=/tmp/ccZC7iqy.res >> -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc >> -plugin-opt=-pass-through=-lgcc_s --build-id --no-add-needed >> --eh-frame-hdr --hash-style=gnu -m elf_x86_64 -shared >> /usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../lib64/crti.o >> /usr/lib/gcc/x86_64-redhat-linux/4.9.2/crtbeginS.o >> -L/usr/lib/gcc/x86_64-redhat-linux/4.9.2 >> -L/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../lib64 >> -L/lib/../lib64 -L/usr/lib/../lib64 >> -L/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../.. x.o -lstdc++ -lm >> -lgcc_s -lc -lgcc_s /usr/lib/gcc/x86_64-redhat-linux/4.9.2/crtendS.o >> /usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../lib64/crtn.o >> [hjl@gnu-32 tmp]$ >> >> That is why libgcc_nonshared.a is needed. > > See what I wrote. I think it is a bug that we don't do that, in your case > we should pass -lgcc_s -lgcc -lc -lgcc_s -lgcc. > Or, if you don't want to change that, as the multi-versioning change is > i386/x86_64 only change, just ensure that those targets have > t-slibgcc-libgcc in libgcc/config.host and thus behave like most other linux > targets where -lgcc is linked in always after -lgcc_s. > > Jakub
This patch works for me. OK for trunk? gcc/testsuite/ PR target/65612 * g++.dg/ext/mv18.C: New test. * g++.dg/ext/mv19.C: Likewise. * g++.dg/ext/mv20.C: Likewise. * g++.dg/ext/mv21.C: Likewise. * g++.dg/ext/mv22.C: Likewise. * g++.dg/ext/mv23.C: Likewise. libgcc/ PR target/65612 * config.host (tmake_file): Add t-slibgcc-libgcc for Linux/x86. * config/i386/cpuinfo.c (__cpu_model): Initialize. (__cpu_indicator_init@GCC_4.8.0): New. (__cpu_model@GCC_4.8.0): Likewise. * config/i386/t-linux (HOST_LIBGCC2_CFLAGS): Add -DUSE_ELF_SYMVER. Thanks. -- H.J.
0001-Hide-__cpu_indicator_init-__cpu_model-from-linker.patch
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