[PATCH] libstdc++: Fix duplicated export on basic_string::_M_disjunct on Solaris.

[Jonathan Wakely]

On Thu, 9 Apr 2026 at 01:39, Tomasz Kamiński <tkaminsk@redhat.com> wrote:
>
> The patterns for cow_string that were split to exclude starts_with,
> ends_with, did not include name starting with _:
>  _ZNKSs[0-9][0-9][a-z]*;
>  _ZNKSbIwSt11char_traitsIwESaIwEE[0-9][0-9][a-z]*;
>
> This was not caught on x86_64-linux as _M_disjunt was already exported
> in 3.4 version (when HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT
> is defined).
>
> libstdc++-v3/ChangeLog:
>
>         * config/abi/pre/gnu.ver (GLIBCXX_3.4): Remove _ZNKSs11_[MS]_*
>         and _ZNKSbIwSt11char_traitsIwESaIwEE11_[MS]_* patterns.
> ---
> I got this patterns wrong, because SSO string pattern includes _M_disjunct,
> and I have seen this funciton being exported in 3.4 version on linux.
>
> Tested on x86_64-linux (check-abi and baseline). Rainer confirmed it fixes
> Solaris. OK for trunk?
>

OK

>  libstdc++-v3/config/abi/pre/gnu.ver | 2 --
>  1 file changed, 2 deletions(-)
>
> diff --git a/libstdc++-v3/config/abi/pre/gnu.ver b/libstdc++-v3/config/abi/pre/gnu.ver
> index 2ff2aa02383..624de951d41 100644
> --- a/libstdc++-v3/config/abi/pre/gnu.ver
> +++ b/libstdc++-v3/config/abi/pre/gnu.ver
> @@ -270,7 +270,6 @@ GLIBCXX_3.4 {
>      _ZNKSs[5-9][a-b]*;
>      _ZNKSs[0-8][d-e]*;
>      _ZNKSs[0-9][g-z]*;
> -    _ZNKSs11_[MS]_*;
>      _ZNKSs1[2-8][a-z]*;
>      _ZNKSs[2-9][0-9][a-z]*;
>      _ZNKSs4find*;
> @@ -343,7 +342,6 @@ GLIBCXX_3.4 {
>      _ZNKSbIwSt11char_traitsIwESaIwEE[5-9][a-b]*;
>      _ZNKSbIwSt11char_traitsIwESaIwEE[0-8][d-e]*;
>      _ZNKSbIwSt11char_traitsIwESaIwEE[0-9][g-z]*;
> -    _ZNKSbIwSt11char_traitsIwESaIwEE11_[MS]_*;
>      _ZNKSbIwSt11char_traitsIwESaIwEE1[2-8][a-z]*;
>      _ZNKSbIwSt11char_traitsIwESaIwEE[2-9][0-9][a-z]*;
>      _ZNKSbIwSt11char_traitsIwESaIwEE[abd-z]*;
> --
> 2.53.0
>