Build folder (#528)

* validate Pointer incl. tests

* using cargo clippy for coding style as well as cargo fmt

* multi-type declarations incl. tests

* subcommand as well as simple build description file

* improved subcommand

* improved build description file

* adding libraries and parsing them

* documentation and minor improvements

* Pull Request improvements

* package_commands for build description file

* changes after review

* improvements from review

* adding sysroot and target-triple as inline parameters for subcommand

* addingchangable build location

* typos from Build Description File #523

* tests added

* Small review changes

* change relative path to absolut, improved tests

* adapt test for windows

* tests improved

* Made the build work regadless of start location

* make every key optional/default

* typo

* Added lib location to build parameters, made sure default names are calculated from input

Co-authored-by: Ghaith Hachem <[email protected]>

.vscode/launch.json

@@ -39,7 +39,7 @@
                     "kind": "bin"
                 }
             },
-            "args": ["--ir", "/home/ghaith/git/oscat/oscat_single_file.st","/home/ghaith/git/oscat/std_stubs.st", "-o", "/tmp/comp.ll"],
+            "args": ["build", "..\\..\\build_commands_tests\\test_proj\\plc.json"],
             "cwd": "${workspaceFolder}"
         },
         {

book/src/using_rusty/build_description_files.md → book/src/using_rusty/build_description_file.md

@@ -75,7 +75,7 @@ Similarly to specifying an output file via the `-o` or `--output` option, in the
 
 ### target
 
-To build and compile [structured text](https://en.wikipedia.org/wiki/Structured_text) for the rigth platform we need to specify the `target`. As `rustyc` is using [LLVM](https://en.wikipedia.org/wiki/LLVM) a target-tripple supported by LLVM needs to be selected. The default `target` is `x86_64-linux-gnu`.
+To build and compile [structured text](https://en.wikipedia.org/wiki/Structured_text) for the rigth platform we need to specify the `target`. As `rustyc` is using [LLVM](https://en.wikipedia.org/wiki/LLVM) a target-tripple supported by LLVM needs to be selected. The default `target` is the host machine's target. So if a dev container on an `x86_64-docker` is used the target is `x86_64-linux-gnu`.
 
 
 ### compile_type