[bug #68546] bytecode-interpreter: pt-bytecode-vm.cc uses methods removed in C++20

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URL:=0A  <https://savannah.gnu.org/bugs/?68546>=0A=0A                 Summa=
ry: bytecode-interpreter: pt-bytecode-vm.cc uses methods=0Aremoved in C++20=
=0A                   Group: GNU Octave=0A               Submitter: daserga=
tskov=0A               Submitted: Wed 22 Jul 2026 04:23:50 PM UTC=0A       =
         Category: Interpreter=0A                Severity: 3 - Normal=0A   =
             Priority: 5 - Normal=0A              Item Group: Build Failure=
=0A                  Status: None=0A             Assigned to: None=0A      =
   Originator Name:=0A        Originator Email:=0A             Open/Closed:=
 Open=0A         Discussion Lock: Unlocked=0A                 Release: byte=
code-evaluator=0A        Operating System: Mac OS=0A           Fixed Releas=
e: None=0A         Planned Release: None=0A=0A=0A    ______________________=
_________________________________=0A=0AFollow-up Comments:=0A=0A=0A--------=
-----------------------------------------------=0ADate: Wed 22 Jul 2026 04:=
23:50 PM UTC By: Dmitri A. Sergatskov <dasergatskov>=0ATrying to compile Oc=
tave-12 bytecode-interpreter branch on macOS:=0A=0Alibtool: compile:  clang=
++ -std=3Dgnu++20 -DHAVE_CONFIG_H -I. -I..=0A-DOCTINTERP_DLL -Iliboctinterp=
 -I../liboctinterp -I../liboctinterp/corefcn=0A-Iliboctinterp/corefcn/numer=
ic -I../liboctinterp/corefcn/numeric=0A-I../liboctinterp/corefcn/system -Il=
iboctinterp/corefcn/util=0A-I../liboctinterp/corefcn/util -Iliboctinterp/gr=
aphics=0A-I../liboctinterp/graphics -Iliboctinterp/interp -I../liboctinterp=
/interp=0A-I../liboctinterp/load-save -I../liboctinterp/octave-value=0A-I..=
/liboctinterp/operators -Iliboctinterp/parse-tree=0A-I../liboctinterp/parse=
-tree -I../liboctinterp/stream=0A-I../liboctinterp/template-inst -Iliboctav=
e -I../liboctave=0A-I../liboctave/array -Iliboctave/numeric -I../liboctave/=
numeric=0A-Iliboctave/operators -I../liboctave/operators -I../liboctave/sys=
tem=0A-I../liboctave/util -I../liboctave/wrappers=0A-I/opt/homebrew/Cellar/=
hdf5/2.1.1/include -I/opt/homebrew/opt/openjdk/include=0A-I/opt/homebrew/op=
t/openjdk/include/darwin=0A-I/opt/homebrew/opt/libiconv/include -I/opt/home=
brew/include=0A-I/opt/homebrew/opt/readline/include -fPIC -pthread -Wall -W=
 -Wshadow=0A-Woverloaded-virtual -Wold-style-cast -Wformat -Wpointer-arith =
-Wwrite-strings=0A-Wcast-align -Wcast-qual -g3 -O3 -march=3Dnative -flto=3D=
thin=0A-Wno-deprecated-declarations -Wno-old-style-cast -MT=0Aliboctinterp/=
octave-value/liboctave_value_la-ov-oncleanup.lo -MD -MP -MF=0Aliboctinterp/=
octave-value/.deps/liboctave_value_la-ov-oncleanup.Tpo -c=0A../liboctinterp=
/octave-value/ov-oncleanup.cc  -fno-common -DPIC -o=0Aliboctinterp/octave-v=
alue/.libs/liboctave_value_la-ov-oncleanup.o=0A../liboctinterp/parse-tree/p=
t-bytecode-vm.cc:1586:12: error: no member named=0A'unique' in 'std::shared=
_ptr<octave::stack_frame>'=0A 1586 |     if (fp.unique () && m_frame_ptr_ca=
che.size () < 8 && !=0Afp->is_closure_context () =0A      |         ~~ ^=0A=
../liboctinterp/parse-tree/pt-bytecode-vm.cc:6630:12: error: no member name=
d=0A'unique' in 'std::shared_ptr<octave::stack_frame>'=0A 6630 |     if (fp=
.unique () && m_frame_ptr_cache.size () < 8)=0A      |         ~~ ^=0A2 err=
ors generated.=0A=0Astd::shared_ptr::unique has been deprecated in C++17 an=
d removed in C++20.=0AApparently GNU libstdc++ keeps it as extension, but A=
pple's libc++ does not. =0AI will have a patch shortly.=0A=0ADmitri.=0A-- =
=0A=0A=0A=0A=0A=0A=0A=0A=0A    ____________________________________________=
___________=0A=0AReply to this item at:=0A=0A  <https://savannah.gnu.org/bu=
gs/?68546>=0A=0A_______________________________________________=0AMessage s=
ent via Savannah=0Ahttps://savannah.gnu.org/=0A
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