On 06/11/20 11:56 +0100, Rainer Orth wrote:
Hi Jonathan,
libstdc++-v3/ChangeLog:
PR libstdc++/97729
* config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add exports.
* src/c++20/sstream-inst.cc (basic_stringbuf): Instantiate
private constructor taking __xfer_bufptrs.
Tested powerpc64le-linux. Committed to trunk.
unfortunately, this broke Solaris bootstrap again:
ld: fatal: libstdc++-symbols.ver-sun: 7314: symbol
'_ZNSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEEC1EOS4_RKS3_ONS4_14__xfer_bufptrsE':
symbol version conflict
ld: fatal: libstdc++-symbols.ver-sun: 7315: symbol
'_ZNSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEEC2EOS4_RKS3_ONS4_14__xfer_bufptrsE':
symbol version conflict
ld: fatal: libstdc++-symbols.ver-sun: 7316: symbol
'_ZNSt7__cxx1115basic_stringbufIwSt11char_traitsIwESaIwEEC1EOS4_RKS3_ONS4_14__xfer_bufptrsE':
symbol version conflict
ld: fatal: libstdc++-symbols.ver-sun: 7317: symbol
'_ZNSt7__cxx1115basic_stringbufIwSt11char_traitsIwESaIwEEC2EOS4_RKS3_ONS4_14__xfer_bufptrsE':
symbol version conflict
Those are matched by both
##_ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EEC[12]EOS4_RKS3_ONS4_14__xfer_bufptrsE
(glob)
but also by the previous
##_ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]*__xfer_bufptrs*
(glob)
I do have a hacky patch to avoid this, but I guess I best leave it to
you how to best tighten the previous pattern.
It should be fixed at 887515acd27e49c176395ab76d5826959d89cb9b which
is the attached patch. Only tested on x86_64-linux, but my script no
longer shows the conflicts.
I'll try to incorporate that script into the testsuite for gcc-11, or
rewrite it as aprt of testsuite/util/testsuite_abi.cc
commit 887515acd27e49c176395ab76d5826959d89cb9b
Author: Jonathan Wakely <jwak...@redhat.com>
Date: Fri Nov 6 19:53:36 2020
libstdc++: Fix symbol version conflict in linker script
The change in r11-4748-50b840ac5e1d6534e345c3fee9a97ae45ced6bc7 causes
a build error on Solaris, due to the new explicit instantiation matching
patterns for two different symbol versions.
libstdc++-v3/ChangeLog:
* config/abi/pre/gnu.ver (GLIBCXX_3.4.21): Tighten up patterns
for basic_stringbuf that refer to __xfer_bufptrs.
diff --git a/libstdc++-v3/config/abi/pre/gnu.ver b/libstdc++-v3/config/abi/pre/gnu.ver
index ed68ffa28723..2d0f87aa7cc7 100644
--- a/libstdc++-v3/config/abi/pre/gnu.ver
+++ b/libstdc++-v3/config/abi/pre/gnu.ver
@@ -1774,7 +1774,8 @@ GLIBCXX_3.4.21 {
_ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EEC[12]ERKNS_12basic_stringI[cw]S2_S3_EESt13_Ios_Openmode;
_ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EEC[12]ESt13_Ios_Openmode;
_ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EED[012]Ev;
- _ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]*__xfer_bufptrs*;
+ _ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EEC[12]EOS4_ONS4_14__xfer_bufptrsE;
+ _ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]14__xfer_bufptrs[CD][12]*;
_ZNSt7__cxx1115basic_stringbufI[cw]St11char_traitsI[cw]ESaI[cw]EE[a1346789]*;
# _ZNSt7__cxx1118basic_stringstreamI[cw]St11char_traitsI[cw]*;
_ZNSt7__cxx1118basic_stringstreamI[cw]St11char_traitsI[cw]ESaI[cw]EEC[12]EOS4_;
