===> Building for btop-1.4.6
 
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 ╚═════╝    ╚═╝    ╚═════╝ ╚═╝      Makefile v1.6
PLATFORM     ?| macos
ARCH         ?| arm64
GPU_SUPPORT  :| false
CXX          ?| clang++ (15.0.0)
THREADS      :| 10
REQFLAGS     !| -std=c++23
WARNFLAGS    :| -Wall -Wextra -pedantic
OPTFLAGS     :| -O2 
LDCXXFLAGS   :| -pthread -DFMT_HEADER_ONLY -D_GLIBCXX_ASSERTIONS -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG -D_FILE_OFFSET_BITS=64 -fexceptions -fstack-clash-protection  -s -framework IOKit -framework CoreFoundation -Wno-format-truncation
CXXFLAGS     +| $(REQFLAGS) $(LDCXXFLAGS) $(OPTFLAGS) $(WARNFLAGS) -pipe -Os -I/opt/pkg/include -DNDEBUG
LDFLAGS      +| $(LDCXXFLAGS) $(OPTFLAGS) $(WARNFLAGS) -L/opt/pkg/lib

Building btop++ (v1.4.6) macos arm64
mkdir -p bin
mkdir -p obj/osx

Generating man page btop.1...
Configuring obj/config.h
sed -e "s|@GIT_COMMIT@||" -e "s|@CONFIGURE_COMMAND@|/opt/pkg/bin/gmake STATIC=|" -e "s|@COMPILER@|clang++|" -e "s|@COMPILER_VERSION@|15.0.0|" src/config.h.in | tee obj/config.h > /dev/null
Compiling src/btop.cpp
clang++ -pipe -Os -I/opt/pkg/include -DNDEBUG -std=c++23 -pthread -DFMT_HEADER_ONLY -D_GLIBCXX_ASSERTIONS -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG -D_FILE_OFFSET_BITS=64 -fexceptions -fstack-clash-protection  -s -framework IOKit -framework CoreFoundation -Wno-format-truncation -O2  -Wall -Wextra -pedantic -isystem include -Isrc -Iobj -MMD -c -o obj/btop.o src/btop.cpp
clang: warning: -framework IOKit: 'linker' input unused [-Wunused-command-line-argument]
clang: warning: -framework CoreFoundation: 'linker' input unused [-Wunused-command-line-argument]
clang: warning: argument unused during compilation: '-fstack-clash-protection' [-Wunused-command-line-argument]
clang: warning: argument unused during compilation: '-s' [-Wunused-command-line-argument]
warning: unknown warning option '-Wno-format-truncation' [-Wunknown-warning-option]
error: invalid value 'c++23' in '-std=c++23'
note: use 'c++98' or 'c++03' for 'ISO C++ 1998 with amendments' standard
note: use 'gnu++98' or 'gnu++03' for 'ISO C++ 1998 with amendments and GNU extensions' standard
note: use 'c++11' for 'ISO C++ 2011 with amendments' standard
note: use 'gnu++11' for 'ISO C++ 2011 with amendments and GNU extensions' standard
note: use 'c++14' for 'ISO C++ 2014 with amendments' standard
note: use 'gnu++14' for 'ISO C++ 2014 with amendments and GNU extensions' standard
note: use 'c++17' for 'ISO C++ 2017 with amendments' standard
note: use 'gnu++17' for 'ISO C++ 2017 with amendments and GNU extensions' standard
note: use 'c++20' for 'ISO C++ 2020 DIS' standard
note: use 'gnu++20' for 'ISO C++ 2020 DIS with GNU extensions' standard
note: use 'c++2b' for 'Working draft for ISO C++ 2023 DIS' standard
note: use 'gnu++2b' for 'Working draft for ISO C++ 2023 DIS with GNU extensions' standard
gmake: *** [Makefile:397: obj/btop.o] Error 1
*** Error code 2

Stop.
bmake[1]: stopped making "all" in /Volumes/data/jenkins/workspace/pkgsrc-macos-trunk-arm64/sysutils/btop
*** Error code 1

Stop.
bmake: stopped making "all" in /Volumes/data/jenkins/workspace/pkgsrc-macos-trunk-arm64/sysutils/btop