diff --git a/.github/workflows/wide_integer.yml b/.github/workflows/wide_integer.yml
index 0800e1e..eb84ac7 100644
--- a/.github/workflows/wide_integer.yml
+++ b/.github/workflows/wide_integer.yml
@@ -605,7 +605,7 @@ jobs:
       - name: wide-integer-run
         run: bash -l -c 'cd $(cygpath -u "$GITHUB_WORKSPACE") && ./wide_integer.exe'
   gcc-arm-none-eabi:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     defaults:
       run:
         shell: bash
@@ -620,12 +620,12 @@ jobs:
           fetch-depth: '0'
       - name: update-tools
         run: |
-          sudo apt install libncurses5 libpython2.7
+          sudo apt install libncursesw5
           mkdir -p emu_env && cd emu_env
-          wget --no-check-certificate https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-rm/10.3-2021.10/gcc-arm-none-eabi-10.3-2021.10-x86_64-linux.tar.bz2
-          tar -xf gcc-arm-none-eabi-10.3-2021.10-x86_64-linux.tar.bz2
-          wget --no-check-certificate https://github.com/xpack-dev-tools/qemu-arm-xpack/releases/download/v7.1.0-1/xpack-qemu-arm-7.1.0-1-linux-x64.tar.gz
-          tar -xzf xpack-qemu-arm-7.1.0-1-linux-x64.tar.gz
+          wget --no-check-certificate https://developer.arm.com/-/media/Files/downloads/gnu/13.3.rel1/binrel/arm-gnu-toolchain-13.3.rel1-x86_64-arm-none-eabi.tar.xz
+          tar -xf arm-gnu-toolchain-13.3.rel1-x86_64-arm-none-eabi.tar.xz
+          wget --no-check-certificate https://github.com/xpack-dev-tools/qemu-arm-xpack/releases/download/v8.2.6-1/xpack-qemu-arm-8.2.6-1-linux-x64.tar.gz
+          tar -xzf xpack-qemu-arm-8.2.6-1-linux-x64.tar.gz
         working-directory: ./
       - id: upcase_my_example
         uses: ASzc/change-string-case-action@v6
@@ -633,21 +633,33 @@ jobs:
           string: ${{ matrix.example }}
       - name: build-example-stm32f429
         run: |
+          PATH="${{ runner.workspace }}/wide_integer/emu_env/arm-gnu-toolchain-13.3.rel1-x86_64-arm-none-eabi/bin:$PATH"
+          echo 'Query arm-none-eabi-g++ version'
+          echo
+          arm-none-eabi-g++ -v
+          echo
           mkdir -p bin
-          emu_env/gcc-arm-none-eabi-10.3-2021.10/bin/arm-none-eabi-g++ -std=${{ matrix.standard }} -Wall -Wextra -Wpedantic -pedantic -O0 -g -gdwarf-2 -ffunction-sections -fdata-sections -x c++ -fno-rtti -fno-use-cxa-atexit -fno-exceptions -fno-nonansi-builtins -fno-threadsafe-statics -fno-enforce-eh-specs -ftemplate-depth=32 -mcpu=cortex-m4 -mtune=cortex-m4 -mthumb -mfloat-abi=soft -mno-unaligned-access -mno-long-calls -I. -DWIDE_INTEGER_DISABLE_IOSTREAM -DWIDE_INTEGER_DISABLE_TO_STRING -DWIDE_INTEGER_DISABLE_TRIVIAL_COPY_AND_STD_LAYOUT_CHECKS -DWIDE_INTEGER_NAMESPACE=ckormanyos -DWIDE_INTEGER_STANDALONE_${{ steps.upcase_my_example.outputs.uppercase }} examples/${{ matrix.example }}.cpp ./target/micros/stm32f429/make/single/crt.cpp -nostartfiles -Wl,--gc-sections -Wl,-Map,./bin/${{ matrix.example }}.map -T ./target/micros/stm32f429/make/stm32f429.ld --specs=nano.specs --specs=nosys.specs -o ./bin/${{ matrix.example }}.elf
-          emu_env/gcc-arm-none-eabi-10.3-2021.10/bin/arm-none-eabi-objcopy ./bin/${{ matrix.example }}.elf -O ihex ./bin/${{ matrix.example }}.hex
+          arm-none-eabi-g++ -std=${{ matrix.standard }} -Werror -Wall -Wextra -Wpedantic -Wpedantic -Wconversion  -Wsign-conversion -O1 -g -gdwarf-2 -ffunction-sections -fdata-sections -x c++ -fno-rtti -fno-use-cxa-atexit -fno-exceptions -fno-nonansi-builtins -fno-threadsafe-statics -fno-enforce-eh-specs -ftemplate-depth=32 -mcpu=cortex-m4 -mtune=cortex-m4 -mthumb -mfloat-abi=soft -mno-unaligned-access -mno-long-calls -I. -DWIDE_INTEGER_DISABLE_IOSTREAM -DWIDE_INTEGER_DISABLE_TO_STRING -DWIDE_INTEGER_DISABLE_TRIVIAL_COPY_AND_STD_LAYOUT_CHECKS -DWIDE_INTEGER_NAMESPACE=ckormanyos -DWIDE_INTEGER_STANDALONE_${{ steps.upcase_my_example.outputs.uppercase }} examples/${{ matrix.example }}.cpp ./target/micros/stm32f429/make/single/crt.cpp -nostartfiles -Wl,--gc-sections -Wl,-Map,./bin/${{ matrix.example }}.map -T ./target/micros/stm32f429/make/stm32f429.ld --specs=nano.specs --specs=nosys.specs -o ./bin/${{ matrix.example }}.elf
+          arm-none-eabi-objcopy ./bin/${{ matrix.example }}.elf -O ihex ./bin/${{ matrix.example }}.hex
           ls -la ./bin/${{ matrix.example }}.elf ./bin/${{ matrix.example }}.hex ./bin/${{ matrix.example }}.map
         working-directory: ./
       - name: emulate-target stm32f429
         run: |
-          ./emu_env/xpack-qemu-arm-7.1.0-1/bin/qemu-system-gnuarmeclipse --verbose --mcu STM32F429ZI --nographic --gdb tcp::9999 -d unimp,guest_errors &
+          PATH="${{ runner.workspace }}/wide_integer/emu_env/xpack-qemu-arm-8.2.6-1/bin:$PATH"
+          qemu-system-gnuarmeclipse --verbose --mcu STM32F429ZI --nographic --gdb tcp::9999 -d unimp,guest_errors &
+          sleep 2
         working-directory: ./
       - name: run-test-on-target
         run: |
-          ./emu_env/gcc-arm-none-eabi-10.3-2021.10/bin/arm-none-eabi-gdb-py ./bin/${{ matrix.example }}.elf -x ./target/build/test_examples_emulator.py
-          qemu_result=$?
-          echo "qemu_result" "$qemu_result"
-          echo "qemu_result" "$qemu_result" | grep 'qemu_result 0'
+          sleep 2
+          PATH="${{ runner.workspace }}/wide_integer/emu_env/arm-gnu-toolchain-13.3.rel1-x86_64-arm-none-eabi/bin:$PATH"
+          echo 'Run test on target'
+          echo
+          arm-none-eabi-gdb ./bin/${{ matrix.example }}.elf -x ./target/build/test_app_benchmarks_emulator.gdb > ./${{ matrix.example }}.txt
+          cat ./${{ matrix.example }}.txt
+          echo
+          echo 'We will now grep for the right answer...'
+          grep 'value 0xF00DCAFE' ./${{ matrix.example }}.txt
         working-directory: ./
   gcc-avr:
     runs-on: ubuntu-latest
@@ -678,8 +690,8 @@ jobs:
           mkdir bin
           echo ${{ steps.upcase_my_example.outputs.uppercase }}
           echo 'compile examples/${{ matrix.example }}.cpp with:'
-          echo 'avr-g++ -x c++ -std=${{ matrix.standard }} -Os -Werror -Wall -Wextra -Wpedantic -pedantic -Wmain -Wundef -Wconversion -Wsign-conversion -Wunused-parameter -Wuninitialized -Wmissing-declarations -Wshadow -Wunreachable-code -Wswitch-default -Wswitch-enum -Wcast-align -Wmissing-include-dirs -Winit-self -Wfloat-equal -Wdouble-promotion -mmcu=atmega328p -mrelax -finline-functions -finline-limit=32 -fsigned-char -g -gdwarf-2 -fno-exceptions -ffunction-sections -fdata-sections -fno-rtti -fno-use-cxa-atexit -fno-exceptions -fno-threadsafe-statics -fno-enforce-eh-specs -ftemplate-depth=32 -Wzero-as-null-pointer-constant -I. -I../real-time-cpp-root/ref_app/src -I../real-time-cpp-root/ref_app/src/util/STL -DWIDE_INTEGER_DISABLE_IOSTREAM -DWIDE_INTEGER_DISABLE_TO_STRING -DWIDE_INTEGER_DISABLE_TRIVIAL_COPY_AND_STD_LAYOUT_CHECKS -DWIDE_INTEGER_DISABLE_IMPLEMENT_UTIL_DYNAMIC_ARRAY -DWIDE_INTEGER_NAMESPACE=ckormanyos -DWIDE_INTEGER_STANDALONE_${{ steps.upcase_my_example.outputs.uppercase }} examples/${{ matrix.example }}.cpp -Wl,--gc-sections -Wl,-Map,./bin/${{ matrix.example }}.map -o bin/${{ matrix.example }}.elf'
-          avr-g++ -x c++ -std=${{ matrix.standard }} -Os -Werror -Wall -Wextra -Wpedantic -pedantic -Wmain -Wundef -Wconversion -Wsign-conversion -Wunused-parameter -Wuninitialized -Wmissing-declarations -Wshadow -Wunreachable-code -Wswitch-default -Wswitch-enum -Wcast-align -Wmissing-include-dirs -Winit-self -Wfloat-equal -Wdouble-promotion -mmcu=atmega328p -mrelax -finline-functions -finline-limit=32 -fsigned-char -g -gdwarf-2 -fno-exceptions -ffunction-sections -fdata-sections -fno-rtti -fno-use-cxa-atexit -fno-exceptions -fno-threadsafe-statics -fno-enforce-eh-specs -ftemplate-depth=32 -Wzero-as-null-pointer-constant -I. -I../real-time-cpp-root/ref_app/src -I../real-time-cpp-root/ref_app/src/util/STL -DWIDE_INTEGER_DISABLE_IOSTREAM -DWIDE_INTEGER_DISABLE_TO_STRING -DWIDE_INTEGER_DISABLE_TRIVIAL_COPY_AND_STD_LAYOUT_CHECKS -DWIDE_INTEGER_DISABLE_IMPLEMENT_UTIL_DYNAMIC_ARRAY -DWIDE_INTEGER_NAMESPACE=ckormanyos -DWIDE_INTEGER_STANDALONE_${{ steps.upcase_my_example.outputs.uppercase }} examples/${{ matrix.example }}.cpp -Wl,--gc-sections -Wl,-Map,./bin/${{ matrix.example }}.map -o bin/${{ matrix.example }}.elf
+          echo 'avr-g++ -x c++ -std=${{ matrix.standard }} -Os -Werror -Wall -Wextra -Wpedantic -Wpedantic -Wmain -Wundef -Wconversion -Wsign-conversion -Wunused-parameter -Wuninitialized -Wmissing-declarations -Wshadow -Wunreachable-code -Wswitch-default -Wswitch-enum -Wcast-align -Wmissing-include-dirs -Winit-self -Wfloat-equal -Wdouble-promotion -mmcu=atmega328p -mrelax -finline-functions -finline-limit=32 -fsigned-char -g -gdwarf-2 -fno-exceptions -ffunction-sections -fdata-sections -fno-rtti -fno-use-cxa-atexit -fno-exceptions -fno-threadsafe-statics -fno-enforce-eh-specs -ftemplate-depth=32 -Wzero-as-null-pointer-constant -I. -I../real-time-cpp-root/ref_app/src -I../real-time-cpp-root/ref_app/src/util/STL -DWIDE_INTEGER_DISABLE_IOSTREAM -DWIDE_INTEGER_DISABLE_TO_STRING -DWIDE_INTEGER_DISABLE_TRIVIAL_COPY_AND_STD_LAYOUT_CHECKS -DWIDE_INTEGER_DISABLE_IMPLEMENT_UTIL_DYNAMIC_ARRAY -DWIDE_INTEGER_NAMESPACE=ckormanyos -DWIDE_INTEGER_STANDALONE_${{ steps.upcase_my_example.outputs.uppercase }} examples/${{ matrix.example }}.cpp -Wl,--gc-sections -Wl,-Map,./bin/${{ matrix.example }}.map -o bin/${{ matrix.example }}.elf'
+          avr-g++ -x c++ -std=${{ matrix.standard }} -Os -Werror -Wall -Wextra -Wpedantic -Wpedantic -Wmain -Wundef -Wconversion -Wsign-conversion -Wunused-parameter -Wuninitialized -Wmissing-declarations -Wshadow -Wunreachable-code -Wswitch-default -Wswitch-enum -Wcast-align -Wmissing-include-dirs -Winit-self -Wfloat-equal -Wdouble-promotion -mmcu=atmega328p -mrelax -finline-functions -finline-limit=32 -fsigned-char -g -gdwarf-2 -fno-exceptions -ffunction-sections -fdata-sections -fno-rtti -fno-use-cxa-atexit -fno-exceptions -fno-threadsafe-statics -fno-enforce-eh-specs -ftemplate-depth=32 -Wzero-as-null-pointer-constant -I. -I../real-time-cpp-root/ref_app/src -I../real-time-cpp-root/ref_app/src/util/STL -DWIDE_INTEGER_DISABLE_IOSTREAM -DWIDE_INTEGER_DISABLE_TO_STRING -DWIDE_INTEGER_DISABLE_TRIVIAL_COPY_AND_STD_LAYOUT_CHECKS -DWIDE_INTEGER_DISABLE_IMPLEMENT_UTIL_DYNAMIC_ARRAY -DWIDE_INTEGER_NAMESPACE=ckormanyos -DWIDE_INTEGER_STANDALONE_${{ steps.upcase_my_example.outputs.uppercase }} examples/${{ matrix.example }}.cpp -Wl,--gc-sections -Wl,-Map,./bin/${{ matrix.example }}.map -o bin/${{ matrix.example }}.elf
           echo
           echo 'run objcopy with:'
           echo 'avr-objcopy bin/${{ matrix.example }}.elf -O ihex bin/${{ matrix.example }}.hex'
diff --git a/test/stopwatch.h b/test/stopwatch.h
index e1ab5ec..f3f0bb0 100644
--- a/test/stopwatch.h
+++ b/test/stopwatch.h
@@ -61,7 +61,9 @@
 
       timespec ts { };
 
-      timespec_get(&ts, TIME_UTC);
+      const int ntsp { timespec_get(&ts, TIME_UTC) };
+
+      static_cast<void>(ntsp);
 
       return
         static_cast<time_point_type>