This patch is to fix PR 99172. Currently when GCC is configured with --enable-vtable-verify, the libstdc++-v3 Makefiles add "-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" to libtool link commands. The "-fvtable-verify=std" piece causes alternate versions of libtool (such as slibtool) to fail, unable to find "-lvtv" (GNU libtool just removes that piece).
This patch updates the libstdc++-v3 Makefiles to not pass
"-fvtable-verify=std" to the libtool link commands, while continuing
to pass the rest of the VTV flags (which are necessary for VTV to
work).
I tested this by configuring with --enable-vtable-verify, boostrapping
the compiler, and running all the regression testsuites (including
libvtv & libstdc++) without any regressions. I only ran it on a linux
system, on an x86_64 machine.
I also gave a copy of the patch to the person who reported the bug,
and they verified that the patch fixes their issue.
Is this ok to commit?
-- Caroline Tice
cmt...@google.com
libstdc++-v3/ChangeLog
2021-03-10 Caroline Tice <cmt...@google.com>
PR libstdc++/99172
* Makefile.in: Regenerate.
* acinclude.m4: Add definitions for VTV_CXXFLAGS_LT.
* configure: Regenerate.
* doc/Makefile.in: Regenerate.
* include/Maefile.in: Regenerate.
* libsupc++/Makefile.in: Regenerate.
* po/Makefile.in: Regenerate.
* python/Makefile.in: Regenerate.
* src/Makefile.am (AM_CXXFLAGS_LT): New definition.
(CXXLINK): Update to use AM_CXXFLAGS_LT instead of AM_CXXFLAGS.
* src/Makefile.in: Regenerate.
* src/c++11/Makefile.in: Regenerate.
* src/c++17/Makefile.in: Regenerate.
* src/c++20/Makefile.in: Regenerate.
* src/c++98/Makefile.in: Regenerate.
* src/filesystem/Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.
v1-0001-libstdc-v3-Update-VTV-vars-for-libtool-link-comma.patch
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