Add `-ansi` cflag to Autotools.
@@ -92,7 +92,7 @@ libtcod_la_SOURCES = \
../../src/png/lodepng.c \
../../src/png/lodepng.h
-libtcod_la_CFLAGS = $(AM_CFLAGS) $(PTHREAD_CFLAGS)
+libtcod_la_CFLAGS = $(AM_CFLAGS) $(PTHREAD_CFLAGS) -ansi
libtcod_la_LIBADD = $(PTHREAD_LIBS)
