add cmake build process + switch to bison

.gitignore

@@ -0,0 +1,2 @@
+build/
+CMakeCache.txt

CMakeLists.txt

@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 2.8.12)
+project(WRAITH_LANG C)
+
+set(CMAKE_C_STANDARD 99)
+
+find_package(BISON)
+find_package(FLEX)
+
+include_directories(${CMAKE_SOURCE_DIR})
+
+BISON_TARGET(Parser wraith.y ${CMAKE_CURRENT_BINARY_DIR}/y.tab.c COMPILE_FLAGS -d)
+FLEX_TARGET(Scanner wraith.lex ${CMAKE_CURRENT_BINARY_DIR}/lex.yy.c)
+
+ADD_FLEX_BISON_DEPENDENCY(Scanner Parser)
+
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+add_executable(
+    wraith_compile
+    ${BISON_Parser_OUTPUTS}
+    ${FLEX_Scanner_OUTPUTS}
+)

wraith.lex

@@ -1,3 +1,7 @@
+%{
+    #include "y.tab.h"
+%}
+
 %option noyywrap
 
 %%

wraith.y

@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include "ast.h"
 #include "stack.h"
-#define YYSTYPE struct Node*
 void yyerror(FILE *fp, char *s)
 {
     fprintf (stderr, "%s\n", s);
@@ -10,10 +9,13 @@ void yyerror(FILE *fp, char *s)
 
 Stack *stack;
 
-#define YYDEBUG 1
-int yydebug=1;
+extern char *yytext;
+extern int yylex (void);
+extern FILE *yyin;
 %}
 
+%define api.value.type {struct Node*}
+
 %token NUMBER
 %token INT
 %token UINT
@@ -234,8 +236,6 @@ Declarations            : Declaration Declarations
                         }
 %%
 
-#include "lex.yy.c"
-
 int main(int argc, char *argv[])
 {
     if (argc < 2)