switch to vcpkg+cmake, add debian build to workflows

using lionkor's template (MIT licensed)

This is a combination of 64 commits.

cmake/CompilerWarnings.cmake

@@ -0,0 +1,115 @@
+# from here:
+#
+# https://github.com/lefticus/cppbestpractices/blob/master/02-Use_the_Tools_Available.md
+# Courtesy of Jason Turner
+# License here: https://github.com/cpp-best-practices/cppbestpractices/blob/master/LICENSE
+# 
+# This version has been modified by the owners of the current respository.
+# Modifications have mostly been marked with "modified" or similar, though this is not 
+# strictly required.
+
+function(set_project_warnings project_name)
+    set(MSVC_WARNINGS
+            /W4         # Baseline reasonable warnings
+            /w14242 # 'identifier': conversion from 'type1' to 'type1', possible loss
+                            # of data
+            /w14254 # 'operator': conversion from 'type1:field_bits' to
+                            # 'type2:field_bits', possible loss of data
+            /w14263 # 'function': member function does not override any base class
+                            # virtual member function
+            /w14265 # 'classname': class has virtual functions, but destructor is not
+                            # virtual instances of this class may not be destructed correctly
+            /w14287 # 'operator': unsigned/negative constant mismatch
+            /we4289 # nonstandard extension used: 'variable': loop control variable
+                            # declared in the for-loop is used outside the for-loop scope
+            /w14296 # 'operator': expression is always 'boolean_value'
+            /w14311 # 'variable': pointer truncation from 'type1' to 'type2'
+            /w14545 # expression before comma evaluates to a function which is missing
+                            # an argument list
+            /w14546 # function call before comma missing argument list
+            /w14547 # 'operator': operator before comma has no effect; expected
+                            # operator with side-effect
+            /w14549 # 'operator': operator before comma has no effect; did you intend
+                            # 'operator'?
+            /w14555 # expression has no effect; expected expression with side- effect
+            /w14619 # pragma warning: there is no warning number 'number'
+            /w14640 # Enable warning on thread un-safe static member initialization
+            /w14826 # Conversion from 'type1' to 'type_2' is sign-extended. This may
+                            # cause unexpected runtime behavior.
+            /w14905 # wide string literal cast to 'LPSTR'
+            /w14906 # string literal cast to 'LPWSTR'
+            /w14928 # illegal copy-initialization; more than one user-defined
+                            # conversion has been implicitly applied
+            /permissive- # standards conformance mode for MSVC compiler.
+    )
+
+    set(CLANG_WARNINGS
+            -Wall
+            -Wextra    # reasonable and standard
+            -Wshadow # warn the user if a variable declaration shadows one from a
+                             # parent context
+            -Wnon-virtual-dtor # warn the user if a class with virtual functions has a
+                                                 # non-virtual destructor. This helps catch hard to
+                                                 # track down memory errors
+            -Wold-style-cast # warn for c-style casts
+            -Wcast-align         # warn for potential performance problem casts
+            -Wunused                 # warn on anything being unused
+            -Woverloaded-virtual # warn if you overload (not override) a virtual
+                                                     # function
+            -Wpedantic     # warn if non-standard C++ is used
+            -Wconversion # warn on type conversions that may lose data
+            -Wsign-conversion    # warn on sign conversions
+            -Wnull-dereference # warn if a null dereference is detected
+            -Wdouble-promotion # warn if float is implicit promoted to double
+            -Wformat=2 # warn on security issues around functions that format output
+                                 # (ie printf)
+            # modified; added more errors / warnings
+            # some have been set to be errors, but the option _WARNINGS_AS_ERRORS
+            # (see below) should still be used in strict pipelines.
+            -Werror=uninitialized
+            -Werror=float-equal
+            -Werror=write-strings
+            -Werror=strict-aliasing -fstrict-aliasing
+            -Werror=missing-declarations
+            -Werror=missing-field-initializers
+            -Werror=ctor-dtor-privacy
+            -Werror=switch-enum
+            -Wswitch-default
+            -Werror=unused-result
+            -Werror=implicit-fallthrough
+            -Werror=return-type
+            -Wmissing-include-dirs
+    )
+
+    if (${PROJECT_NAME}_WARNINGS_AS_ERRORS)
+        set(CLANG_WARNINGS ${CLANG_WARNINGS} -Werror)
+        set(MSVC_WARNINGS ${MSVC_WARNINGS} /WX)
+    endif()
+
+    set(GCC_WARNINGS
+            ${CLANG_WARNINGS}
+            -Wmisleading-indentation # warn if indentation implies blocks where blocks
+                                                             # do not exist
+            -Wduplicated-cond # warn if if / else chain has duplicated conditions
+            -Wduplicated-branches # warn if if / else branches have duplicated code
+            -Wlogical-op     # warn about logical operations being used where bitwise were
+                                         # probably wanted
+            # -Wuseless-cast # warn if you perform a cast to the same type (modified: removed)
+    )
+
+    if(MSVC)
+        set(PRJ_WARNINGS ${MSVC_WARNINGS})
+    elseif(CMAKE_CXX_COMPILER_ID MATCHES ".*Clang")
+        set(PRJ_WARNINGS ${CLANG_WARNINGS})
+    elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+        set(PRJ_WARNINGS ${GCC_WARNINGS})
+    else()
+        message(AUTHOR_WARNING "No compiler warnings set for '${CMAKE_CXX_COMPILER_ID}' compiler.")
+    endif()
+
+    target_compile_options(${project_name} PUBLIC ${PRJ_WARNINGS})
+
+    if(NOT TARGET ${project_name})
+        message(AUTHOR_WARNING "${project_name} is not a target, thus no compiler warning were added.")
+    endif()
+endfunction()