Fix the build with --enable-compile-warnings=error

1. Add missing 'const' keyword for string literals.
2. Add missing 'static' keyword for internal functions.
3. Add missing default cases for switch statements.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/main.c b/src/main.c
index 43ba73d..4b46032 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,8 +6,6 @@
 extern FILE *yyin;
 extern AST_NODE *prog;
 
-void printGV(AST_NODE *root, char* fileName);
-
 int main (int argc, char **argv)
 {
     if (argc != 2) {