diff --git a/src/cfg/opt.c b/src/cfg/opt.c
index 10d1540..6a1862f 100644
--- a/src/cfg/opt.c
+++ b/src/cfg/opt.c
@@ -28,6 +28,10 @@ TargetConfig default_target_config_from_args(int argc, char *argv[]) {
             config.print_asm = true;
         } else if (strcmp(option, "--print-ir") == 0) {
             config.print_ir = true;
+        } else if (strcmp(option, "--mode=app") == 0) {
+            config.mode = Application;
+        } else if (strcmp(option, "--mode=lib") == 0) {
+            config.mode = Library;
         }
     }
 
@@ -40,9 +44,10 @@ void print_help(void) {
             "Compile file(s): gsc <options> [files]",
             "Build project (build.toml): gsc [directory] [target]|all",
             "Options:",
-            "    --print-ast    print resulting abstract syntax tree to a file",
-            "    --print-asm    print resulting assembly language to a file",
-            "    --print-ir     print resulting LLVM-IR to a file"
+            "    --print-ast      print resulting abstract syntax tree to a file",
+            "    --print-asm      print resulting assembly language to a file",
+            "    --print-ir       print resulting LLVM-IR to a file",
+            "    --mode=[app|lib] set the compilation mode to either application or library"
     };
 
     for (unsigned int i = 0; i < sizeof(lines) / sizeof(const char *); i++) {
diff --git a/src/cfg/opt.h b/src/cfg/opt.h
index 5c9e6b5..cd00b62 100644
--- a/src/cfg/opt.h
+++ b/src/cfg/opt.h
@@ -8,11 +8,26 @@
 #include <toml.h>
 #include <glib.h>
 
+typedef enum TargetCompilationMode_t {
+    Application,
+    Library
+} TargetCompilationMode;
+
 typedef struct TargetConfig_t {
     char* name;
     bool print_ast;
     bool print_asm;
     bool print_ir;
+    // root module file which imports all submodules
+    char* root_module;
+    // output directory for binaries
+    char* output_directory;
+    // output directory for intermediate representations (LLVM-IR, Assembly, ...)
+    char* archive_directory;
+    // mode of compilation
+    TargetCompilationMode mode;
+    // number between 1 and 3
+    int optimization_level;
 } TargetConfig;
 
 typedef struct ProjectConfig_t {