gcc/clang/valgrind

gcc-clang-checks.txt

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+-Wall
+-Wextra
+-Wpedantic
+-Wshadow
+-Wconversion
+-fsanitize=address

valgrind_notes.txt

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+valgrind \
+  --leak-check=full \
+  --show-leak-kinds=all \
+  --track-origins=yes \
+  ./test_app