Date: Wed, 01 Mar 2006 10:14:31 +0000

From: "alan buckley"
Subject: Re: Updating SDL for RISC OS

I've attached a zip file with three diffs to get SDL to build on RISC OS.

configure.in.diff and makedeps.sh.diff have been modified so that they
can build the assembler file in video/riscos. You may want to double
check these as I don't know a lot about unix shell programming.
(I've tested them cross-compiling on cygwin).

sdlsysthread.diff is the changes required to SDL_systhread.c for RISC
OS. As you suspected with these changes in place you can delete the
RISC OS specific threading code in thread/riscos.

I've also renamed SDL_riscosASM.s to SDL_riscosASM.S, but I'm never
quite sure how to rename files in CVS, so if you could to this it would
be appreciated.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401463

build-scripts/makedep.sh

@@ -67,6 +67,12 @@ __EOF__
 
 	\$(LIBTOOL) --tag=CC --mode=compile \$(auxdir)/strip_fPIC.sh \$(NASM) $src -o \$@
 
+__EOF__
+        ;;
+        S) cat >>${output}.new <<__EOF__
+
+	\$(LIBTOOL)  --mode=compile \$(CC) -c $src  -o \$@
+
 __EOF__
         ;;
         *)   echo "Unknown file extension: $ext";;

configure.in

@@ -2325,6 +2325,7 @@ case "$target" in
         if test x$enable_video = xyes; then
             AC_DEFINE(SDL_VIDEO_DRIVER_RISCOS)
             SOURCES="$SOURCES $srcdir/src/video/riscos/*.c"
+            SOURCES="$SOURCES $srcdir/src/video/riscos/*.S"
             have_video=yes
         fi
         # Set up files for the joystick library
@@ -2388,6 +2389,7 @@ OBJECTS=`echo $SOURCES | sed 's,[[^ ]]*/\([[^ ]]*\)\.asm,$(objects)/\1.lo,g'`
 OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.cc,$(objects)/\1.lo,g'`
 OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.m,$(objects)/\1.lo,g'`
 OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.c,$(objects)/\1.lo,g'`
+OBJECTS=`echo $OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.S,$(objects)/\1.lo,g'`
 
 SDLMAIN_OBJECTS=`echo $SDLMAIN_SOURCES | sed 's,[[^ ]]*/\([[^ ]]*\)\.cc,$(objects)/\1.o,g'`
 SDLMAIN_OBJECTS=`echo $SDLMAIN_OBJECTS | sed 's,[[^ ]]*/\([[^ ]]*\)\.m,$(objects)/\1.o,g'`

src/thread/pthread/SDL_systhread.c

@@ -34,6 +34,13 @@ static int sig_list[] = {
 	SIGVTALRM, SIGPROF, 0
 };
 
+#ifdef __RISCOS__
+/* RISC OS needs to know the main thread for
+ * it's timer and event processing. */
+int riscos_using_threads = 0;
+Uint32 riscos_main_thread = 0; /* Thread running events */
+#endif
+ 
 
 static void *RunThread(void *data)
 {
@@ -58,6 +65,14 @@ int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
 		SDL_SetError("Not enough resources to create thread");
 		return(-1);
 	}
+
+#ifdef __RISCOS__
+	if (riscos_using_threads == 0) {
+		riscos_using_threads = 1;
+		riscos_main_thread = SDL_ThreadID();
+	}
+#endif
+
 	return(0);
 }