[perf] Fix SDL compilation for MacOS X

The attached patch makes the SDL tests compile under Mac OS X.  The
problem is:

1) that <SDL_main.h> should be included in files that define the main
function for SDL Mac OS X programs (this is not true with the upcoming
SDL 1.3 release).

2) that -lSDLmain, because it is statically linked, needs the Cocoa
framework in the LDADD of the main program.  Again, 1.3 will not require
this.

perf/Makefile.am

@@ -55,6 +55,10 @@ cairo_perf_SOURCES += cairo-perf-posix.c
 endif
 endif
 
+if CAIRO_HAS_SDL_SURFACE
+cairo_perf_LDADD = $(LDADD) $(sdl_LIBS)
+endif
+
 libcairoperf_la_SOURCES = \
 	cairo-perf-report.c	\
 	cairo-stats.c		\

perf/cairo-perf.c

@@ -33,6 +33,10 @@
 
 #include "cairo-boilerplate-getopt.h"
 
+#if CAIRO_HAS_SDL_SURFACE
+#include <SDL_main.h>
+#endif
+
 /* For basename */
 #ifdef HAVE_LIBGEN_H
 #include <libgen.h>

test/Makefile.am

@@ -294,6 +294,10 @@ if HAVE_PTHREAD
 cairo_test_suite_LDADD += -lpthread
 endif
 
+if CAIRO_HAS_SDL_SURFACE
+cairo_test_suite_LDADD += $(sdl_LIBS)
+endif
+
 BUILT_SOURCES += cairo-test-constructors.c
 noinst_SCRIPTS = make-cairo-test-constructors.pl
 EXTRA_DIST += $(BUILT_SOURCES) $(noinst_SCRIPTS) COPYING

test/cairo-test-runner.c

@@ -33,6 +33,10 @@
 #undef CAIRO_VERSION_MICRO
 #include "../cairo-version.h"
 
+#if CAIRO_HAS_SDL_SURFACE
+#include <SDL_main.h>
+#endif
+
 #include <pixman.h> /* for version information */
 
 #if HAVE_FORK && HAVE_WAITPID