Fixes to make GCC happier.

Makefile

@@ -27,7 +27,7 @@ debug: prep wrend
 
 # Debug command-line interpreter.
 wrend: $(DEBUG_OBJECTS)
-	$(CC) $(CFLAGS) $(DEBUG_CFLAGS) -Iinclude -o wrend $^
+	$(CC) $(CFLAGS) $(DEBUG_CFLAGS) -Iinclude -lm -o wrend $^
 
 # Debug object files.
 build/debug/%.o: src/%.c include/wren.h $(HEADERS)
@@ -38,7 +38,7 @@ release: prep wren
 
 # Release command-line interpreter.
 wren: $(RELEASE_OBJECTS)
-	$(CC) $(CFLAGS) $(RELEASE_CFLAGS) -Iinclude -o wren $^
+	$(CC) $(CFLAGS) $(RELEASE_CFLAGS) -Iinclude -lm -o wren $^
 
 # Release object files.
 build/release/%.o: src/%.c include/wren.h $(HEADERS)

src/main.c

@@ -1,3 +1,5 @@
+#define _GNU_SOURCE // Makes getline() available in GCC.
+
 #include <stdarg.h>
 #include <stdbool.h>
 #include <stdio.h>
@@ -56,6 +58,10 @@ static int runFile(WrenVM* vm, const char* path)
     case WREN_RESULT_SUCCESS: result = 0; break;
     case WREN_RESULT_COMPILE_ERROR: result = 65; break; // EX_DATAERR.
     case WREN_RESULT_RUNTIME_ERROR: result = 70; break; // EX_SOFTWARE.
+    default:
+      // Unreachable.
+      result = 255;
+      break;
   }
 
   wrenFreeVM(vm);

src/wren_compiler.c

@@ -2248,6 +2248,9 @@ static int getNumArguments(const uint8_t* bytecode, const Value* constants,
       // There are two bytes for the constant, then two for each upvalue.
       return 2 + (loadedFn->numUpvalues * 2);
     }
+
+    default:
+      UNREACHABLE();
   }
 }
 

src/wren_value.c

@@ -159,7 +159,7 @@ ObjFiber* wrenNewFiber(WrenVM* vm, Obj* fn)
 
 ObjFn* wrenNewFunction(WrenVM* vm, Value* constants, int numConstants,
                        int numUpvalues, int numParams,
-                       u_int8_t* bytecode, int bytecodeLength,
+                       uint8_t* bytecode, int bytecodeLength,
                        ObjString* debugSourcePath,
                        const char* debugName, int debugNameLength,
                        int* sourceLines)

src/wren_value.h

@@ -564,7 +564,7 @@ ObjFiber* wrenNewFiber(WrenVM* vm, Obj* fn);
 // copy [constants] into its own array.
 ObjFn* wrenNewFunction(WrenVM* vm, Value* constants, int numConstants,
                        int numUpvalues, int numParams,
-                       u_int8_t* bytecode, int bytecodeLength,
+                       uint8_t* bytecode, int bytecodeLength,
                        ObjString* debugSourcePath,
                        const char* debugName, int debugNameLength,
                        int* sourceLines);