Add the base containerized c toolchain environment

README.md

@@ -20,5 +20,3 @@ Rules:
 * Please provide an adequate entry in the Wiki for each non-trivial code contribution.
 
 For additional information, please refer to the [Wiki](https://gitea.dmz.rs/sborovic/dmzOS/wiki).
-
-TEST

TOOLCHAIN.md

@@ -0,0 +1,18 @@
+# Instruction on running utilities
+
+## c_toolchain utility docker image
+
+Dockerfile: `dockerfile.c_toolchain`
+Run the docker-compose command to get a `bash` shell that is bound to the `dmzOS` directory:
+```bash
+docker-compose run --rm c_toolchain
+```
+
+Any changes in the container shell will be reflected in the local `dmzOS` directory.
+
+The image contains `ident` abd `clang-format` as `C` code formatters. A .vimrc file is automatically part of the image, and it contains a rule to make vim run the following formatting command on buffer save:
+```bash
+ident -kr -ts4 %
+```
+
+This is using the Kernighan and Ritchie code styling, as well as identations with 4 spaces.

config/.vimrc

@@ -0,0 +1,7 @@
+set nobackup
+set nowritebackup
+set noswapfile
+set autoread
+
+set number relativenumber
+autocmd BufWritePost *.[ch] exec "!indent -kr -nut % && rm %~"

dmzOS/test/test.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[])
+{
+    if (argc < 2) {
+        printf("Please provide at least one argument\n");
+        exit(1);
+    };
+    printf("Hello, C!\n");
+    return 0;
+}

docker-compose.yml

@@ -0,0 +1,12 @@
+version: '3.8'
+
+services:
+  c_toolchain:
+    build:
+      context: ./
+      dockerfile: dockerfile.c_toolchain
+    container_name: c_toolchain
+    tty: true
+    stdin_open: true
+    volumes:
+      - ./dmzOS:/dmzOS

dockerfile.c_toolchain

@@ -0,0 +1,6 @@
+FROM ubuntu:18.04
+RUN apt-get update && apt-get install -y vim gcc indent clang clang-format gdb binutils
+WORKDIR /dmzOS
+#Getting prebuilt binary from llvm 
+COPY ./config/* /root
+ENTRYPOINT [ "bash" ]