add command line flags to include "cairo.h" and link against libcairo

Author: marssaxman

gum/fast/Makefile

@@ -7,7 +7,9 @@ fast.so: fast.c
 	gcc -shared -pthread -fPIC -fwrapv -O2 -Wall -fno-strict-aliasing \
             -I/usr/include/python2.5 -I/usr/include/python2.6 \
             -I/usr/include/python2.7 \
-            -lcairo -o fast.so fast.c
+            `pkg-config --cflags cairo` \
+            -o fast.so fast.c \
+            `pkg-config --libs cairo`
 	if [ ! -e ../fast.so ]; then ln -s fast/fast.so ../; fi
 
 fast.c: fast.pyx

gum/fast/fast.h

@@ -5,11 +5,3 @@ typedef struct {
   void *ctx;
 } PycairoContext;
 
-void cairo_move_to (void *cr, double x, double y);
-void cairo_line_to (void *cr, double x, double y);
-void cairo_rectangle(void *cr, double x, double ymin,
-                     double w, double h);
-void cairo_set_source_rgb (void *cr, double r, double g, double b);
-void cairo_stroke (void *cr);
-void cairo_fill (void *cr);
-void cairo_set_line_width(void *cr, double w);

gum/fast/fast.pyx

@@ -6,6 +6,8 @@ cdef extern from "math.h":
 cdef extern from "fast.h":
     ctypedef struct PycairoContext:
       void *ctx
+
+cdef extern from "<cairo.h>":
     void cairo_move_to (void *cr, double x, double y) nogil
     void cairo_line_to (void *cr, double x, double y) nogil
     void cairo_rectangle(void *cr, double x, double ymin,